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US 7,459,971 B2Granted
Amplifier circuit
AssigneeSony Corporation
InventorsKatsuhisa Daio, Tomoyuki Hiro
Life of this patent
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Abstract
The present invention provides an amplifier circuit comprising a differential amplifier and a negative feedback loop circuit, in which a positive feedback loop circuit having a gain smaller than a gain of the negative feedback loop circuit is formed inside the negative feedback loop circuit.
Claims4
An amplifier circuit comprising a differential amplifier and a negative feedback loop circuit, wherein:
- a positive feedback loop circuit having a gain smaller than a gain of said negative feedback loop circuit is formed inside the negative feedback loop circuit;
- the gain of the positive feedback loop circuit and the gain of the negative feedback loop circuit have a positive correlation;
- and
- the positive feedback loop circuit includes a positive feedback amplifier having a gain Gp, and the negative feedback loop circuit includes a negative feedback amplifier having a gain Gn.
1 more element
Dependencies are inferred from the claim text.