Patent ID: 7023292

Claim:
A polar modulator for a RF carrier signal, comprising: a controller that is configured to generate a plurality of modulation control signals based on information that is to be transmitted, wherein the controller varies the plurality of modulation control signals independently of one another; a phase splitter that is configured to split the RF carrier signal into quadrature component signals that are 90 degrees out of phase with each other; a plurality of variable current sources that are each configured to generate a variable amplitude current signal based on a different one of the modulation control signals; a plurality of transistor circuits that are each configured to amplify a different one of the quadrature component signals with a variable amplification based on the variable amplitude current signal from a different one of the variable current sources to generate an amplitude adjusted quadrature component signal; and a combiner that is configured to combine the amplitude adjusted quadrature component signals from each of the transistor circuits to generate a phase-modulated RF carrier output signal.