Sine wave multiplication device and input device having the same
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United States of America Patent
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Jun 25, 2019
Grant Date -
Jan 11, 2018
app pub date -
Sep 25, 2017
filing date -
Apr 14, 2015
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Abstract
Provided is a sine wave multiplication device of simple configuration, broad input signal level range, and minimal fluctuation in characteristics due to temperature. A signal component that corresponds to a product of an input signal Si and the third harmonic wave of a first square wave W1 included in an output signal Su1; and a signal component that corresponds to a product of the input signal Si and the fifth harmonic wave of the first square wave W1 is canceled by: a signal component that corresponds to a product of the input signal Si and the fundamental wave of a second square wave W2 included in an output signal Su2; and a signal component that corresponds to a product of the input signal Si and the fundamental wave of a second square wave W3 included in an output signal Su3.
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