Digital modulator

Details Digital modulator Digital modulator

H - Electricity

03

F

330/12, 354/70

H03F 3/181 (2006.01) H03F 3/183 (2006.01) H03F 3/20 (2006.01)

Patent

CA 1193017

Abstract An amplifier (Figs. 1-3) is disclosed for amplifying an amplitude and frequency varying input signal. The amplifier includes a circuit (24, 100) responsive to the input signal to provide a digital representation thereof. In addition, a plurality of signal sources (30-36) are provided which each provide an associated signal. Another circuit (38-52) combines selected ones of the associated signals in accordance with the digital representation to provide a first combined signal having substantially the same waveform as, hut of greater amplitude than the input signal. In several embodiments, a circuit (74, 76-78) provides an error signal in accordance with the difference between the desired and actual forms of the first signal. This error signal is combined with the first combined signal to derive an error corrected signal.

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