Patent ID: 8587372
Filing Date: 2013-11-19
Classification: H03F,H05B

Abstract:
1. A multi-input differential amplifying device, comprising: a differential amplifier including an inverting input terminal and a non-inverting input terminal; and an input portion configured to apply a first input voltage to a first input terminal which is one of the inverting input terminal and the non-inverting input terminal and apply a second input voltage to a second input terminal which is the other one of the inverting input terminal and the non-inverting input terminal, the first input voltage corresponding to first input signals including a plurality of input signals for the first input terminal, the second input voltage corresponding to a second input signal which is one input signal for the second input terminal, wherein: the input portion is configured to correct an offset voltage between the first input voltage and the second input voltage, the input portion comprises a plurality of input circuits corresponding to the plurality of first input signals, and each of the input circuits comprises: