Patent ID: 9154082
Filing Date: 2015-10-06
Classification: H03B,H03F,H04B

Abstract:
1. An input signal amplifier. comprising: an inverting amplifier that outputs an input signal, a logic of which is inverted; a first switch that switches an input terminal of the inverting amplifier between being grounded and not grounded; and a feedback resistor connected in parallel with the inverting amplifier and including a first value of resistance and a second value of resistance that is lower than the first value of resistance, wherein the feedback resistor includes both a second switch that allows the feedback resistor to have the first value of resistance and a third switch that allows the feedback resistor to have the second value of resistance, and wherein when a state of the input signal amplifier switches from off to on, the first switch is controlled to have the input terminal of the inverting amplifier be not grounded, and the third switch is controlled to have the feedback resister have the second value of resistance for a predetermined period of time.