Signal modulation circuit
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United States of America Patent
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Oct 10, 2017
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N/A
app pub date -
Apr 25, 2016
filing date -
Jun 11, 2013
priority date (Note) -
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Abstract
Provided is a modulation circuit that can correct an output state in real time and reliably modulate an input signal to output the modulated signal. The signal modulation circuit includes a subtractor, an integrator, a chopper circuit, a frequency divider, and a D-type flip-flop. A delay circuit of a sigma delta modulation circuit is not provided to a feedback circuit, and a signal is delayed and quantized in the D-type flip-flop. The chopper circuit inserts a zero level at timing synchronized with a clock signal, so that pulse density modulation is performed.
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