Patent ID: 6983024
Filing Date: 2006-01-03
Classification: H03C,H03F,H04L

Abstract:
1. An integrated circuit comprising: a first amplitude modulator operative to amplitude modulate a first carrier signal with a first input signal to provide a first output signal, wherein the phase of the first carrier signal is not inverted by the first input signal; a second amplitude modulator operative to amplitude modulate a second carrier signal with a second input signal to provide a second output signal, wherein the first and second input signals are derived based on a first modulating signal, and wherein the chase of the second carrier signal is not inverted by the second input signal; a third amplitude modulator operative to amplitude modulate a third carrier signal with a third input signal to provide a third output signal, wherein the phase of the third carrier signal is not inverted by the third input signal; a fourth amplitude modulator operative to amplitude modulate a fourth carrier signal with a fourth input signal to provide a fourth output signal, wherein the third and fourth input signals are derived based on a second modulating signal, and wherein the phase of the fourth carrier signal is not inverted by the fourth input signal; and a combiner operative to combine the first, second, third, and fourth output signals to provide a modulated signal, wherein the modulated signal comprises an inphase component formed by the first modulating signal and a quadrature component formed by the second modulating signal.