Patent ID: 8238476
Filing Date: 2012-08-07
Classification: G06K,H01L

Abstract:
1. A semiconductor device comprising: a demodulation circuit for demodulating an alternating signal and generating a first demodulation signal; and an amplifier comprising: wherein the first transistor and the second transistor are arranged so that, when the first line and the second line are respectively applied with a first power source voltage and a second power source voltage, a changing point of input-output characteristics of the amplifier is located at a voltage lower than a half value of a difference between the first power source voltage and the second power source voltage, wherein the first demodulation signal is input to gates of the first transistor and the second transistor of the amplifier, wherein the amplifier generates and outputs a second demodulation signal, and wherein an amplitude of the second demodulation signal is equal to either an amplitude of the first power source voltage or an amplitude of the second power source voltage.