Patent ID: 6754287
Filing Date: 2004-06-22
Classification: H03F,H04L

Abstract:
An apparatus for digitally producing a modulated signal, comprising:an average power input for accepting a first input signal, the first input signal being representative of an average output power to be produced by the apparatus; an amplitude modulation input for receiving a second input signal, the second input signal being representative of an amplitude modulation to be produced by the apparatus; a summation unit for combining the first input signal with the second input signal and producing a duty cycle control signal, where the duty cycle control signal is proportional to the first input signal and the second input signal; a duty cycle controller for accepting the duty cycle control signal and producing an output signal, where the duty cycle of the output signal is proportional to the duty cycle control signal; an integrating circuit where the output signal of the duty cycle controller is accepted and integrated, thus producing an integrated output signal; and a resonant circuit for accepting the integrated output signal from the integrating circuit and resonating in proportion to the frequency and amplitude of the integrated output signal, to produce a sinusoidal output signal proportional to the integrated output signal from the integrating circuit.