Low Power Low Noise CMOS Chopper Amplifier
نویسندگان
چکیده
AbstractChopping is a proficient way to reduce the low frequency offset and 1/f noise in amplifiers. In this paper, a low power low noise CMOS chopper amplifier is presented. It is composed of a two stage amplifier. The first stage’s high output impedance and the equivalent Miller capacitance of the second stage constitute together a low pass filter, which reduces the power consumption. The circuit of the presented amplifier is designed and simulated at 0.18μm CMOS Process and 1.8V supply. The simulation results show that the average power consumption is 44 μW. The chopper amplifier has a gain of 103.5dB and unity gain bandwidth of 100KHz.
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