Quick comparison circuit
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United States of America Patent
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Dec 8, 2015
Grant Date -
Jul 16, 2015
app pub date -
Jul 30, 2014
filing date -
Jan 16, 2014
priority date (Note) -
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Abstract
A quick comparison circuit includes a cascaded N-stage operational amplifier, a flip-latch, a biasing circuit, and a control signal generating circuit, with N≧2, and two differential signals to be compared being inputted to an input terminal of a first stage operational amplifier, an output terminal of a Nth stage operational amplifier being connected with an input terminal of the flip-latch, the biasing circuit supplying a biasing current to each stage operational amplifier, the control signal generating circuit being connected with the N-stage operational amplifier and the flip-latch respectively to supply a working time sequence and a reset control signal for them, and each stage operational amplifier having the same structure. This circuit has high gain and improved comparison speed.
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