Patent ID: 8547446
Filing Date: 2013-10-01
Classification: H03F,H04N

Abstract:
1. A fully-differential amplifier provided with a positive-phase input terminal, a negative-phase input terminal, a positive-phase output terminal, and a negative-phase output terminal, the fully-differential amplifier comprising: a positive-phase input transistor having a gate terminal connected to the positive-phase input terminal; a negative-phase input transistor having a gate terminal connected to the negative-phase input terminal; first and second resistance elements that are provided to connect a source terminal of the positive-phase input transistor and a source terminal of the negative-phase input transistor; a third resistance element provided to connect the source terminal of the positive-phase input transistor to the positive-phase output terminal; and a fourth resistance element provided to connect the source terminal of the negative-phase input transistor to the negative-phase output terminal, wherein the first and third resistance elements are connected in parallel with each other between the source terminal of the positive-phase input transistor and a power terminal, and wherein the second and fourth resistance elements are connected in parallel with each other between the source terminal of the negative-phase input transistor and a power terminal.