Detection device, sensor, electronic apparatus, and moving object
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United States of America Patent
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Mar 21, 2017
Grant Date -
Oct 16, 2014
app pub date -
Mar 18, 2014
filing date -
Mar 22, 2013
priority date (Note) -
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Abstract
A detection device includes a driving circuit and a detection circuit. The detection circuit includes first and second electric charge-voltage conversion circuits to which first and second detection signals are input, first and second gain adjustment amplifiers that amplify output signals of the circuits, a switching mixer that has first and second input nodes to which the output signals of the first and second gain adjustment amplifiers are input, and performs differential synchronous detection thereon on the basis of a synchronization signal from the driving circuit, so as to output first and second output signals to first and second output nodes, first and second filters that receive the first and second output signals from the first and second output nodes of the switching mixer, and an A/D conversion circuit that receives output signals from the first and second filters so as to perform differential A/D conversion thereon.
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