Amplifying circuit
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United States of America Patent
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Apr 17, 2012
Grant Date -
Aug 25, 2011
app pub date -
Feb 22, 2011
filing date -
Feb 22, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
To efficiently obtain two outputs including one at a normal level and the other at an excessive level. An input signal input to the negative input terminal of an operational amplifier (14) having a negative feedback path is amplified to output an output signal. Signal combining units (18, 20, 22) are provided for adding in a weighted manner a negative input terminal side signal obtained by combining the input signal input to the negative input terminal of the operational amplifier (14) and a feedback signal from the negative feedback path and the output signal from the operational amplifier to output a combined signal, so that two signals, namely the output signal from the operational amplifier (14) and the combined signal, are obtained.
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