Modulators inventions 06/09

20090160571 - Circuit and method for generating a continuous pulse signal: The present invention discloses a circuit and method for generating a continuous pulse signal. The circuit of the present invention comprises: a PWM device generating a clock signal and a PWM signal, and a pulse continuity detector coupled to the PWM device. The pulse continuity detector further comprises: a positive... Agent: Sinorica, LLC

20090160572 - Communication apparatus: A communication apparatus has a local oscillator which performs phase modulation based on a phase component of a baseband signal and outputs a phase modulated signal, a controlling circuit which is supplied with an integer portion included in an amplitude component of the baseband signal and generates and outputs a... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20090146754 - Pulse-width modulator methods and apparatus: Otherwise conventional pulse-width modulators (PWMs) generate signals that can be converted into other forms by reshapers, and thereby overcome many of the problems of conventional PWMs in applications that demand high performance, such as switched-mode amplifiers and radio-frequency transmitters in modern communication systems. With a suitable reshaper, a conventional PWM... Agent: Potomac Patent Group PLLC

20090140821 - Apparatus and method for compensating carrier feedthrough in quadrature modulation system: The present invention relates to an apparatus and a method for compensating carrier feedthrough in a quadrature modulation system. In order to suppress the carrier feedthrough, and minimize and compensate the carrier feedthrough, differences of baseband differential input DC voltages in an in-phase as well as a quadrature-phase are simultaneously... Agent: JeffersonIPLaw, LLP