Oscillators inventions 05/06

20060109058 - Clock oscillator: An oscillator circuit and a method of generating an oscillating signal are disclosed. An oscillator comprises a first flip-flop and a second flip-flop coupled with the first flip-flop to provide an oscillating signal. A method of generating an oscillating signal comprises providing the oscillating signal as a first clock input...

20060109059 - System and method for maintaining an accurate frequency on a voltage controlled oscillator: A method for phase-locking a voltage controlled oscillator is disclosed. The method comprises receiving, at a phase detector, a phase input signal and a phase feedback signal from the voltage controlled oscillator; measuring a pulse width property of an error signal output from the phase detector to obtain a pulse...

20060109060 - Cr oscillation circuit: A CR oscillation circuit comprises first and second logic elements, a capacitive element, and a resistive element. The first logic element is connected between a first node and a second node. The second logic element is connected between the second node and a third node. The capacitive element is connected...

20060103474 - Oscillator, integrated circuit, and communication apparatus: An oscillator of the present invention includes: (a) a plurality of voltage control oscillator circuits, each of whose oscillation frequency varies, according to a control voltage, between a lower limit frequency and an upper limit frequency; and (b) a selection circuit for selecting an arbitrary voltage control oscillator circuit from...

20060103473 - Ultrawideband cmos transceiver: A direct conversion ultrawideband transceiver employing three phase locked loops (PLLs). The PLLs are preferably fixed-frequency PLLs that operate continuously, at different frequencies, with a selected frequency determined by selecting the output of one of the three PLLs. The use of three PLLs is suitable for use in a communication...

20060103475 - Oscillator device for frequency modulation: The present invention pertains to an oscillator arrangement for carrying out a frequency modulation process, wherein an oscillator (1) with automatic amplitude control (5, 6, 7) is provided. The shift keying is not realized with reconnectable capacitances in the oscillator (1) that determine its oscillator frequency, but rather by suitably...

20060103476 - Phase lock loop and the control method thereof: A phase lock loop and the control method thereof. The phase lock loop adjusts operating states automatically to generate a feedback clock for tracing a reference clock. The control method generates the first and second clocks corresponding to the highest and lowest frequency oscillating clocks respectively generated by the phase...

20060103477 - Oscillator and method for operating an oscillator: An oscillator is provided that includes at least one capacitor, at least one comparator, and at least one device for charging or discharging the at least one capacitor. The capacitor is coupled to the comparator. The comparator compares the voltage on the capacitor with a reference voltage, and activates the...

20060103479 - Oscillator delay stage with active inductor: According to some embodiments, a circuit includes a ring oscillator delay stage. The delay stage may include a first transistor, a second transistor, and an active inductor. A gate of the first transistor may receive a first input signal, a gate of the second transistor may receive a second input...

20060103478 - Ultra high frequency ring oscillator with voltage controlled frequency capabilities: A pseudo Set/Reset latch circuit is configured with modified NOR or NAND gates wherein one of the series pull-up devices or pull-down devices is removed. A minimum of three pseudo Set/Reset latches may be coupled as a ring oscillator generating an output and a non-skewed complementary output. Additionally, feed-forward inverting...

20060103480 - Method and apparatus for selectively performing lock-out function in integrated circuit device: A lock-out circuit is adapted to selectively perform a lock-out function in an integrated circuit device. The lock-out function cuts off the supply of an operating voltage to the integrated circuit device whenever a power supply voltage for the device falls below a predetermined detection voltage. However, the lock-out function...

20060103481 - Clock signal generator: A clock signal generator includes a quartz crystal multivibrator circuit and a pulse-shaping circuit. The pulse-shaping circuit includes a D trigger. The D trigger includes a Q terminal, a Q′ terminal, a CP terminal, and a D terminal. An output signal from the quartz crystal multivibrator is transferred to the...

20060097796 - Apparatus and method for phase lock loop gain control using unit current sources: A gain compensator compensates for the gain variation of a varactor-tuned voltage tuned oscillator (VCO) in a phase lock loop (PLL). The VCO includes a parallel LC circuit having multiple fixed capacitors that can be switched-in or switched-out of the LC circuit according to a capacitor control signal to perform...

20060097797 - Apparatus and method for phase lock loop gain control using unit current sources: A gain compensator compensates for the gain variation of a varactor-tuned voltage tuned oscillator (VCO) in a phase lock loop (PLL). The VCO includes a parallel LC circuit having multiple fixed capacitors that can be switched-in or switched-out of the LC circuit according to a capacitor control signal to perform...

20060097793 - Control device of a pll and control method thereof: A control device of a phase-locked loop (PLL) for controlling an oscillator of the PLL to generate a clock signal, includes: a phase frequency detector (PFD) for generating at least one digital signal according to the phase and the frequency of at least one input signal; a digital filtering module...

20060097795 - Phase and delay locked loops and semiconductor memory device having the same: A phase locked loop includes a phase difference detector for detecting a phase difference between an input clock signal and an output clock signal to generate an up signal and a down signal; a charge pump for raising a level of a control signal by supplying a supply current in...

20060097794 - Phase-locked loop apparatus and method thereof: A PLL device includes a first hybrid PLL and a second digital phase/frequency detection module. The second digital phase/frequency detection module and the first hybrid PLL's oscillator, switching unit, and analog control signal generating module are capable of forming a second hybrid PLL. The switching unit selectively activates either the...

20060097798 - Voltage controlled oscillator with varactor-less tuning: According to an exemplary embodiment, a voltage controlled oscillator includes a PFET having a first gate terminal, a first source terminal, a first drain terminal, and a first body terminal, where the first source terminal is coupled to a bias voltage and the first body terminal is coupled to a...

20060097799 - Cmos balanced colpitts oscillator: A CMOS Balanced Colpitts oscillator which benefits from low cost CMOS technology. By overcoming the limited transconductance of CMOS transistors to permit oscillation with a crystal, the Balanced Colpitts application is expanded beyond simple VCO designs and permits crystal oscillator applications. The crystal is connected between the gates of the...

20060097800 - Low power balanced colpitts oscillator with improved negative resistance: A low power balanced Colpitts oscillator circuit with improved negative resistance. The oscillator circuit comprises two cross-coupled Colpitts oscillators with a crystal oscillator connected between the two oscillators. A single current source can be used for both Colpitts oscillators since only one Colpitts needs a current source at a time....

20060097801 - Oscillator and communication device: The oscillator includes: a first oscillator circuit in which first and second transistors cross-connected to each other are connected to a resonant circuit; and a second oscillator circuit in which third and fourth transistors cross-connected to each other are connected to a resonant circuit, wherein a coupling capacitor and coupling...

20060097803 - Electronic circuitry: Electronic circuitry comprising operational circuits of active switching type requiring timing signals, and conductive means for distributing said timing signals to the operational circuits, wherein the timing signal distribution means includes a signal path that has different phases of a drive signal are supplied via active means at different positions...

20060097804 - Internal voltage generator for semiconductor memory device: An internal voltage generator capable of reducing the variation width in the level of an internal voltage VPP, by performing charge pumping only a predetermined number of times in a period where an oscillator driving signal is at a logic HIGH level, and then stopping the charge pumping operation. The...

20060097802 - Sram ring oscillator: An SRAM design evaluation circuit topology has the gates of the SRAM cell pass Gate Field Effect Transistors (FETs) connected to the cross-coupled gates of the inverter pair of the SRAM cell. This evaluation circuit typology is used in a full cell implementation. A series of full cells are interconnected...

20060097805 - Temperature compensation for a voltage-controlled oscillator: An oscillator is provided that includes an oscillating structure generating an output signal with a frequency that drifts as a function of a parameter of its environment, and a compensation circuit coupled to the oscillating structure. The oscillating structure has a ring structure that includes delay cells looped together, and...

20060097806 - Wideband gaussian white noise source: A white noise generator comprising a MOSFET operated in its linear region and having zero source-drain DC bias current. This is achieved by connecting the source or drain terminal of the MOSFET to a gate terminal of a MOSFET amplifier that may be implemented as a multi-stage differential amplifier. Such...

20060097807 - Hyperfrequency oscillator with very high stability: The oscillator of the invention comprises a one-piece dielectric resonator in the form of a right cylinder frustum hollowed out at mid-height along chords of its cross section, so as to leave a central core and two lateral flanges, the drillholes having symmetry of order N, where N≧4, at least...

20060097808 - Semiconductor device and semiconductor chip: A semiconductor device according to an embodiment of the present invention includes a semiconductor chip and a quartz oscillator. The semiconductor chip includes a first clock signal input terminal receiving a clock signal from the quartz oscillator, and a second clock signal input terminal receiving an externally generated clock signal....

20060097810 - Cmos single-ended frequency doubler: A CMOS single-ended frequency doubler with improved subharmonic rejection and low phase noise which allows a single ended reference signal to be utilized in a Balanced Colpitts oscillator. The input is reproduced with a 180-degree phase shift for the opposite Colpitts transistor. This is achieved by adding two PMOS transistors....

20060097809 - Generation of electric oscillations by continuous, supercooled superconductors under a voltage: The essence of the invention is the use of supercooled superconductors for generation of high-frequency electric oscillations. The superconductor is supercooled, i.e. in the normal phase at a temperature lower than the critical transition temperature for superconductivity, under an applied electric energy source. In such non equilibrium conditions the superconductor...

20060097811 - Variable inductor, and oscillator and communication system using the same: There are provided a variable inductor with little degradation in quality factor, and an oscillator and a communication system using the variable inductor. An inductance controller comprising a reactance device with a variable device value, such as, for example, a variable capacitor, is connected to a secondary inductor, magnetically coupled...

20060097812 - Amplitude level control circuit for an oscillator: Amplitude level control circuit for an oscillator comprising first means arranged to generate a first current for driving the oscillator; and second means arranged to generate a second current such that in direct current conditions the second current is arranged to be a predetermined ratio of the first current, wherein...

20060097813 - Oscillator of semiconductor device: An oscillator of a semiconductor memory device, wherein a reference voltage that flexibly shifts according to the shift in a power supply voltage is generated, and a reference clock is generated using the reference voltage. It is thus possible to generate the reference clock having a constant cycle regardless of...

20060091963 - Control loop filter: A feedback control loop having a filter response and a cut-off frequency comprises a system under control for generating an output signal being an output signal of the feedback control loop in response to a control difference signal, a loop filter for generating a feedback signal in response to the...

20060091964 - Method and apparatus for jitter reduction in phase locked loops: A method and apparatus for jitter reduction in a Phase Locked Loop (PLL) that includes determining a size of a original charge pump adequate to generate an appropriate control voltage to a Voltage Controlled Oscillator (VCO) of a PLL based on the charge pump receiving a single up signal or...

20060091965 - Novel circuit for minimizing filter capacitance leakage induced jitter in phase locked loops (plls): A method, an apparatus, and a computer program are provided to minimize filter capacitor leakage in a Phased Locked Loop (PLL). In high frequency processors and devices, filter leakage currents can cause substantial problems by causing PLLs to drift out of phase lock. To combat the leakage currents, a dummy...

20060091966 - Synchronously coupled oscillator: A phase synchronous multiple LC tank oscillator is described. A plurality of oscillator stages are configured to oscillate synchronously. The phase of each of the plurality of oscillator stages is substantially the same and the plurality of oscillators are inductively coupled....

20060091967 - Tunable ring oscillator: A tunable ring oscillator, in accordance with the teachings described herein, may include one or more delay circuits having a coarse tuning circuitry and a fine tuning circuitry. The coarse tuning circuitry may be used to set one of a minimum time delay or a maximum time delay as a...

20060091968 - Method and system for a differential switched capacitor array for a voltage controlled oscillator (vco) or a local oscillator (lo) buffer: Methods and systems for increasing an amplifier circuit's Q factor are disclosed herein. The method may comprise coupling a first LC tank to a source of a single switching transistor and coupling a second LC tank to a drain of the single switching transistor. A gate of the single switching...

20060091969 - Lc tank clock driver with automatic tuning: A new clock driver is described for the use in the phase detector of a clock and data recovery circuit (CDR). By building a resonant LC tank, whose center frequency is similar to the clock frequency, a low power clock driver is realized. A method based upon minimizing power consumption...