Signal processing device
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United States of America Patent
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Aug 11, 2015
Grant Date -
Nov 20, 2014
app pub date -
May 15, 2014
filing date -
May 20, 2013
priority date (Note) -
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Abstract
A signal processing device is produced. The signal processing device including a first transistor with high off-state resistance, a second transistor which controls conduction between two different nodes, a capacitor which holds electric charge, and a current control element such as a transistor or a resistor. The first node to which a gate of the second transistor and a second electrode of the current control element are connected, and the second node to which one of a source and a drain of the first transistor, a first electrode of the capacitor, and a first electrode of the current control element are connected. The capacitance (including a parasitic capacitance) of the second node is greater than ten times the capacitance (including a parasitic capacitance) of the first node. The capacitance does not affect the first node; thus, a boosting effect is large and charge retention characteristics are favorable.
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