Semiconductor device with improved variable gain amplification
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United States of America Patent
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May 22, 2018
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app pub date -
Oct 19, 2017
filing date -
Apr 22, 2015
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Abstract
In a semiconductor device, a first variable gain amplifier and a second variable gain amplifier constitute a switched capacitor type variable gain amplifier. A selection switch switches connection among the first variable gain amplifier, the second variable gain amplifier, and a load circuit such that the first variable gain amplifier and the load circuit are connected to each other when an amplification factor of the first variable gain amplifier is a predetermined gain or less, and the second variable gain amplifier is connected between the first variable gain amplifier and the load circuit when the amplification factor of the first variable gain amplifier is larger than the predetermined gain.
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