Signal processing device, and driving method and program thereof
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United States of America Patent
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Jun 21, 2016
Issued Date -
N/A
app pub date -
Aug 18, 2014
filing date -
Aug 20, 2013
priority date (Note) -
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Abstract
A power switch 307a is provided between a bias generation circuit 301 and a high potential power source, or a power switch 307b is provided between the bias generation circuit 301 and a low potential power source. A bias potential Vb output from the bias generation circuit 301 is held by a potential holding circuit 300. The bias potential Vb held by the potential holding circuit 300 is input to a bias generation circuit 301a, and a bias potential Vb2 output from the bias generation circuit 301a on which an input signal IN is superimposed is input to an amplifier circuit 302. The potential holding circuit 300 is constituted of a capacitor 306 and a switch 305 formed of, for example, a transistor with a low off-state current that is formed using a wide band gap oxide semiconductor. Structures other than the above structure are claimed.
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