Modulators inventions 03/09

20090079511 - Polar modulation transmission circuit and communication device: A transmission circuit for outputting transmission signals with a low distortion and a high efficiency over a wide range of output power is provided. A signal generation section (11) generates an amplitude signal and a phase signal. An angle modulation section (12) performs angle modulation on the phase signal and... Agent: Wenderoth, Lind & Ponack L.L.P.

20090072921 - Polar modulation without analog filtering: This disclosure relates to systems and methods for polar modulation without analog filters. Digitals filters, a second order hold interpolator and a reconfigurable third order noise shaper can be used instead of the analog filters used in conventional polar modulators. The polar modulator receives either receives the input in polar... Agent: Lee & Hayes, PLLC

20090066435 - Time modulation with cosine function: A method and apparatus is described for a time modulated signal. A cosine function is used as the basis for the signal with time intervals at the maximum and minimum values of the cosine function defining the encoded data. The received waveform is twice differentiated to provide a cosine function... Agent: Blakely Sokoloff Taylor & Zafman LLP

20090066436 - Multi-brand electronic apparatus and multi-band signal processing method: A multi-band electronic apparatus and method thereof is provided. The method comprises outputting a first output signal in the first band by a first voltage controlled oscillator according to a switch control signal and a control voltage, outputting a second output signal in the second band by a second voltage... Agent: Muncy, Geissler, Olds & Lowe, PLLC

20090058549 - Systems and methods to minimize startup transients in class d amplifiers: Systems and methods for minimizing startup transients in digital audio controllers that may result in audible artifacts in the output of an audio amplification system. One embodiment comprises a digital PWM amplifier that includes a mechanism for controlling the amount of dead time in the audio output signal. When the... Agent: Law Offices Of Mark L. Berrier