Amplifiers – Sum and difference amplifiers
Reexamination Certificate
2011-05-31
2011-05-31
Shingleton, Michael B (Department: 2815)
Amplifiers
Sum and difference amplifiers
C330S110000, C330S308000, C250S2140AG, C250S2140AG, C327S309000
Reexamination Certificate
active
07952427
ABSTRACT:
A signal amplifier circuit includes peak value holding circuit11receiving positive-phase input signal, peak value holding circuit12receiving negative-phase input signal, adder13adding the positive-phase input signal and output signal of peak value holding circuit12, adder14adding the negative-phase input signal and output signal of the peak value holding circuit11, non-inverting amplifier15amplifying output signal of adder13, non-inverting amplifier16amplifying output signal of adder14, peak value holding circuit21receiving positive-phase output signal of non-inverting amplifier15, peak value holding circuit22receiving negative-phase output signal of non-inverting amplifier16, adder23adding the positive-phase output signal and output signal of peak value holding circuit22, adder24adding the negative-phase output signal and output signal of peak value holding circuit21, and differential amplifier29amplifying difference between output signals of adders23and24. Error in discrimination for small-amplitude signal embedded in tail is reduced.
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Renesas Electronics Corporation
Shingleton Michael B
Sughrue & Mion, PLLC
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