Waveform shaping circuit, signal generation apparatus, and signal reading system
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United States of America Patent
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May 31, 2022
Grant Date -
Nov 4, 2021
app pub date -
Jul 24, 2019
filing date -
Jul 26, 2018
priority date (Note) -
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Abstract
A waveform shaping circuit is configured without including a diode that is affected by temperature. The waveform shaping circuit includes: a capacitor with one end into which a differential signal Vd0 is inputted and another end connected to an output; an impedance element that has one end connected to the other end of the capacitor and another end into which a target constant voltage is applied; a switch circuit that is constructed of a series circuit with an impedance element and a switch without including a diode, has one end connected to the output, and has another end into which the target constant voltage is applied; and a switch control circuit that shifts the switch into an on state during a low voltage period in an AC component of the differential signal and shifts the switch to an off state during a high voltage period of the AC component.
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