Amplifiers inventions 06/06

20060139089 - Intelligent high-power amplifier module: An amplifier module has a substrate, as assembly having one or more integrated circuit (IC) dies mounted to the substrate, and one or more other electronic components mounted to the substrate. The assembly receives an input signal and generates an amplified output signal. The one or more other electronic components...

20060139090 - Signal amplification method and amplifier array: An amplifier array includes a servo amplifier, which has a reference signal input, a return signal input, and an output signal connection, which supplies an output signal path, a reference signal generator, which supplies reference signals with different level heights to the reference signal input, and with a return, which...

20060139092 - Load mismatch adaptation in coupler-based amplifiers: Coupler-based amplifiers provide a measure of load mismatch based on the difference between the two output signal amplitudes from the amplifiers. This measure can be used to control variable matching networks (VMNs) or amplifier supply voltages to maintain constant distortion levels and high power transfer/efficiency and even to control output...

20060139091 - Power amplifier employing thin film ferroelectric phase shift element: An amplifier includes a signal splitter operable to receive an input signal and generate at least first and second split signals, a first amplifier adapted to receive the first split signal and to generate a first amplified signal, and a second amplifier adapted to receive the second split signal and...

20060139093 - Three-channel state-variable compressor circuit: An all-pass state-variable Filter processes an input program signal into low, middle and high, frequency band signals. The middle frequency band signal has an additional inversion stage with respect to the low frequency and high frequency band signals. A first, second and third SDC (Scaled Detector Circuits) each have an...

20060139094 - Semiconductor integrated circuit for high frequency power amplifier, electronic component for high frequency power amplifier, and radio communication system: In a radio communication system, an electronic component for high frequency power amplifier carries out the detection of output level, required for feedback control of the output power of a high frequency power amplification circuit, by current detection. The electronic component has an error amplifier. The error amplifier compares an...

20060139095 - Digital differential amplification control device: A digital differential amplification control device includes: digital data generator for differential amplification control; differential controller for transmitting separately an A-phase signal which is a rectangular wave transmitted from the data generator, and a B-phase signal that is an inverted A-phase signal; and corrector for correcting at least one of...

20060139096 - Apparatus and method for biasing cascode devices in a differential pair using the input, output, or other nodes in the circuit: A differential amplifier is configured in a cascode configuration that includes input transistors that are connected to corresponding cascode transistors. The gates of the cascode transistors are tied together to form a common bias for the cascode devices. The input transistors of the differential amplifier receive a differential input signal...

20060139098 - Differential amplifier: A differential amplifier of the present invention comprises transistors where to each of which one of two inputs to said differential amplifier is provided; current mirror circuits where each of which delivers one of the outputs of the differential amplifier to the load side; and cut-off prevention units where each...

20060139097 - Low voltage cmos differential amplifier: A low voltage CMOS differential amplifier is provided. More specifically, there is provided a device comprising a differential pair coupled to a first tail current transistor and to a component wherein the first tail current transistor is configured to provide a tail current to the differential pair and the component...

20060139099 - Intelligent rf power control for wireless modem devices: A system and method of optimizing the output power of a power amplifier to maintain satisfactory RF response under varying power amplifier operating conditions. The operating conditions include operating temperature, supply voltage, and operating frequency. Existing sensors monitor the aforementioned operating conditions. An application within the wireless device containing the...

20060139100 - Amplifier and method for processing signals: In some embodiments, an apparatus includes an amplifier circuit and a bias circuit coupled to the amplifier. The amplifier circuit includes an input port and an output port, an input port circuit element coupled to the input port, an output port circuit element coupled to the output port, and an...

20060139101 - Step-down circuit with stabilized voltage: The present invention provides a semiconductor integrated circuit device equipped with a negative feedback amplifier circuit or a step-down circuit which realizes stabilization of an output voltage effectively in response to a variation in power supply voltage. A constant current source is used to cause a bias current for setting...

20060132230 - Method and apparatus for compensating amplifier output for temperature and process variations: An amplifier circuit includes a calibration circuit with a controllable circuit element such as a digital resistor. One or more properties of the controllable circuit element (e.g., the resistance in a digital resistor) is varied by a digital calibration word such that the voltage drop across the resistor matches a...

20060132231 - Power amplifying apparatus: A power amplifying apparatus which is of a switching type and capable of efficiently amplifying a power of an input AC signal such as an acoustic signal, includes a first switch circuit (11) and a second switch circuit (12) to which a power supply voltage Vc is applied, an inductor...

20060132232 - Multi-mode power amplifier: A power amplifier includes an input network, output stages, coupled in parallel and configured to output power optimally in corresponding power-ranges, the output stages coupled to the input network, an output impedance matching network, coupled to the output stages and not containing a switching element, and a bias-control network, coupled...

20060132234 - Integrated booster amplifier: An amplifier is provided. The amplifier comprises an H-bridge with two halves. A capacitor and two inductors are coupled to the H-bridge. Each inductor, a half of the H-bridge, and the capacitor are configured as a boost converter....

20060132233 - Integrated circuit devices having a control circuit for biasing an amplifier output stage and methods of operating the same: An integrated circuit device includes an amplifier circuit that generates an output voltage. A bias control circuit is configured to generate a bias control voltage or the output voltage at an output thereof based on a state of a control signal. An output stage driver circuit that is responsive to...

20060132236 - Apparatus and method for receiving inputted signal: An input signal receiver of a semiconductor device includes a gain control unit for outputting a gain control signal and a variable gain amplifier for amplifying external clock in response to the gain control signal, wherein the gain control signal determines a gain of the variable gain amplifier. Further, the...

20060132235 - Gain-controlled amplifier, receiver circuit and radio communication device: A gain-controlled amplifier capable of dealing with the system for performing the receiving operation continuously, and capable of correcting a change of a DC offset owing to an operation condition such as temperature; a receiver circuit using the gain-controlled amplifier; and a radio communication device installing the receiver circuit. In...

20060132237 - Linear-in-db variable gain amplifiers with an adaptive bias current: Linear-in-dB current-steering VGAs with an adaptive bias current operable so that as the gain of the amplifier decreases, the DC current consumption also decreases. The modified VGA circuits result in power consumption savings, which are of particular value in wireless (battery powered) applications....

20060132238 - Amplifier for inductive loads: An amplifier circuit controls the output current through an inductive load. A signal is amplified by one or more op amps, and sourced into a back to back coupling of an NPN transistor and a PNP transistor. In a positive circuit segment, current is sourced to an inductive load, and...

20060132239 - Input tracking current mirror for a differential amplifier system: An input tracking current mirror for a differential amplifier system includes a current mirror having an input leg and an output leg, a differential amplifier including a first set of at least two transconductance components, each having at least one input terminal for receiving input signals, the first set of...

20060132240 - Source follower and current feedback circuit thereof: A current feedback circuit is used in the source follower. The source follower includes a first MOS transistor and a current mirror. The first MOS transistor has a gate receiving an inputting signal and a source outputting an output signal. A drain current flows through the first MOS transistor. The...

20060132241 - Transistor integrated circuit device and manufacturing method thereof: There are provided a transistor integrated circuit device which reduces the integrated area of a circuit while avoiding an element destruction caused by thermal runaway, and a method of manufacturing the transistor integrated circuit device. A cut capacitor (13) is composed of an upper electrode formed from a wiring metal...

20060132242 - Low noise amplifier for wideband tunable matching: Provided is a low noise amplifier with a common source and a source degeneration, which has linearity, power gain, noise factor, and lossless input matching. The low noise amplifier includes: a first inductor having one terminal connected to an input terminal receiving a signal; a second inductor having one terminal...

20060125554 - Asynchronous btl design for a class-d audio amplifier: The present invention provides an asynchronous BTL (Bridge Tied Load) design for a Class-D audio amplifier. The Class-D audio amplifier comprises two independent signal routes, each of the two independent signal routes includes a PWM (Pulse Width Modulator), a predriver and a power MOS circuit; each of the two independent...

20060125555 - Digital amplifier: A digital amplifier (1) comprising a first modulation stage (9) arranged to receive a digital data signal and to generate a corresponding modulated reference signal; a comparator (12) arranged to receive a feedback signal and the modulated reference signal and generate a corresponding error signal (13) indicative of a difference...

20060125556 - Signal amplifier and integrated circuit: A signal amplifier and an integrated circuit capable of obtaining a high gain and high output in a wide range. The signal amplifier includes a pre-stage circuit for inputting a signal from outside and a post-stage circuit for amplifying the signal output from the pre-stage circuit and outputting it. The...

20060125557 - Impedance matched variable gain low noise amplifier using shunt feed-back: The variable gain amplifier includes a forward path that provides the amplifier variable gain, and a feedback path. The feedback path uses a switch that is turned on at low gain levels. The switch taps into the feedback resistor, shunting it to signal-ground and eliminating the feedback mechanism. This ensures...

20060125558 - Radio frequency power amplifier for lossless power combining: An amplifier device (40) includes at least one amplifier (42) having an output. A plurality of conductors (48, 50, 52) are coupled to the output in parallel with each other. The plurality of conductors (48, 50, 52) each has an electrical length that corresponds to a quarter wavelength of a...

20060125560 - Adaptive predistortion for a transmit system with gain, phase and delay adjustments: Systems and methods relating to the provision of gain, phase and delay adjustments to signals to be used by a predistortion subsystem. A portion of an input signal is delayed by delay elements prior to being received by the predistortion subsystem. The delayed input signal portion is also received by...

20060125559 - Method of enhancing power amplifier linearity: A method of enhancing power amplifier linearity includes steps to ensure power amplifier spectral purity in cable broadband environments as well as in other RF environments. The technique employed may be either non-decision directed or decision directed. The non linearity products are canceled by processing the signal before it is...

20060125561 - High slew ecl device and method therefor: In one embodiment, an ECL logic device uses a capacitor to couple a positive voltage to an output and reduce the rise time of the output signal....

20060125562 - Variable gain amplifiers systems and methods: A system for controlling gain in a polar loop is disclosed. Embodiments of the invention provide for a substantially constant gain tolerant of changes in supply voltage, ambient temperature, and/or manufacturing process....

20060125563 - Method and apparatus for calibrating analog circuits using statistical techniques: The performance of precision analog integrated electronic circuits is directly related to the degree of matching between electrical circuit elements. Any residual mismatch of circuit elements after manufacturing must be calibrated out using numerous techniques such as adjusting potentiometers, trimming capacitors, modifying binary-weighted resistor strings, etc. Prior art matching techniques...

20060125564 - Method of forming a wide bandwidth differential amplifier and structure therefor: In one embodiment, a differential amplifier uses a diode coupled transistor and a series resistor to set a Voh output level and uses another transistor in parallel with the diode coupled transistor and resistor to set a Vol output level....

20060125565 - Controllable rf broadband and amplifier with a constant input impedance: A variable-gain RF amplifier arrangement whose input impedance is essentially independent of the selected gain is proposed, which has a large number of selectable elementary amplifiers, with an input signal being scaled and the input impedance being set to be the same by means of switchable current limiting elements upstream...

20060125566 - Current mirror with low static current and transconductance amplifier thereof: A current mirror with a transconductance amplifier containing the current mirror with a low static current. The current mirror includes: a load with first end and a second end, the first end coupling to a first input current and a fixed voltage difference existing between the first and second ends;...

20060125567 - Amplifier circuit: An amplifier circuit has a simple circuit architecture that enables a push-pull output function while exhibiting low power consumption. The amplifier circuit includes a first transconductance amplifier to which an output of a two-input differential amplifier and a first bias voltage are input. An output of the first transconductance amplifier...

20060125568 - Current threshold circuit: A current threshold circuit includes a series impedance, a reference voltage source, and a comparison module. The series impedance couples an output of a current source to a load, wherein impedance of the series impedance is substantially less than impedance of the load. The reference voltage source is operably coupled...

20060114056 - Offset cancellation in a switching amplifier: A switching circuit is described having an input stage having an input referred offset voltage associated therewith. An output stage has an output offset voltage associated therewith which is due at least in part to the input referred offset associated with the input stage. Offset cancellation circuitry is operable to...

20060114058 - D-class audio power amplifier and method thereof: A D-class audio power amplifier including a microprocessor, a power amplifier, and a low pass filter is provided. The microprocessor is used to sample an input audio signal and output a pulse width modulation (PWM) clock signal. The power amplifier is used to amplify the power of the PWM clock...

20060114057 - Power multiplier system and method: A power multiplier system for an amplifier comprises a power multiplier control stage, an amplifier stage and a first switching stage connectable to the power multiplier control stage. The amplifier stage is connectable to the power multiplier control stage. The power multiplier system has a first output terminal and a...

20060114059 - Power amplifier: The present invention relates to a power amplifier for amplifying an electronic input signal (51) and a multi-band capable frontend with such power amplifier. The power amplifier comprises an amplifier transistor stage (1) having an input (52) and an output (53) and a feedback loop (4) placed between the output...

20060114060 - Composite amplifier structure: A composite power amplifier structure includes a first power amplifier (PAN+1) configured as an auxiliary amplifier of a Doherty amplifier and connected to an output node and an even number of further power amplifiers configured into at least one Chireix pair (PA 1, 1+PA 1,2 . . . PA N,...

20060114061 - Class ab cmos output circuit equiped with cmos circuit operating by predetermined operating current: In a class AB CMOS output circuit provided with a CMOS circuit including first P and N channel transistors and operating by a predetermined operating current Io, a replica circuit is formed on a semiconductor substrate of the CMOS circuit, and includes a second P channel transistor having a size...

20060114062 - Self adaptable bias circuit for enabling dynamic control of quiescent current in a linear power amplifier: A radio frequency (RF) linear power amplifier having an output transistor, and including a circuit means for generating a bias signal producing a quiescent current flowing through the output transistor, a detector circuit for detecting RF input to the amplifier and generating a driving signal according to a power level...

20060114063 - Method and system for constant or proportional to absolute temperature biasing for minimizing transmitter output power variation: In an RF communication system, aspects of constant or proportional to absolute temperature biasing for minimizing transmitter output power variation may comprise configuring at least one current source to provide a temperature dependent current, where the current may be constant with temperature or vary proportionally to absolute temperature. A control...

20060114064 - Doherty amplifier and its distortion characteristic compensation method: Pre-distortion compensation circuits (11, 12) are disposed at stages previous to carrier amplifier 13 and peak amplifier 14, respectively. Pre-distortion compensation circuit (11) has such characteristics that compensate carrier amplifier (13) for a distortion characteristically produced on the operation thereof, particularly, an amplitude-phase (AM-PM) distortion, while pre-distortion compensation circuit (12)...

20060114065 - High linearity digital variable gain amplifier: Variable gain amplifiers offering high frequency response with improved linearity and reduced power dissipation are provided. An amplifier is disclosed that is constructed from a one-stage topology with multiple signal paths and compensation networks for improved linearity and stable operation. In this amplifier, improved performance is obtained by replacing single...

20060114066 - Distortion compensating circuit having negative gain deviation, power amplifier using the same, and communication device having power amplifier: There is used a distortion compensating circuit having a structure in which a circuit including a diode is connected between a signal path and a ground, wherein a voltage applied to the diode is a forward bias voltage, and an amount of change in a ratio between output power output...