rejection amplifier

Analog front-end circuit consists of preamplifier, low pass filter circuit and back stage amplifier circuit, preamplifier circuit instrumentation amplifier is used because it has a high input impedance, high common mode rejection ratio ( CMRR), low noise, and low drift.

模拟前端电路由前置放大电路、高低通滤波电路和后级放大电路组成，前置放大电路用的是仪表放大器，因为它有高输入阻抗、高共模抑制比（CMRR）、低噪声、低漂移。

The static operating current is only several μ A at 1.8 V~ 5.5 V supply voltage. The amplifier achieves an open-loop gain higher than 80 dB, and had high power supply rejection ratio ( PSRR) and high common mode rejection ratio ( CMRR).

电源工作电压1.8V~5.5V，静态工作电流仅为μA级，并具有80dB的开环增益、高电源电压抑制比和高共模抑制比等特点。

In this situation, the CMRR ( common-mode rejection ratio ) of the input differential amplifier was unsatisfactory.

在这种情况下, 输入差分放大器的CMRR ( 共模抑制比 ) 不令人满意.

By means of applied technology of IC operational amplifiers, digital to analog converter and single chip microcontroller, a programmable precision measuring differential amplifier with low noise, low drift, high input impedance and high common mode rejection ratio is developed and introduced.

介绍了一种由DAC电压衰减器作为集成运放反馈电路的低噪声、低漂移、高输入阻抗和高共模抑制比的可编程精密差动测量放大器。

On the Relation Between Power Source Rejection Ratio, Open Loop Voltage Gain and Common Mode Rejection Ratio of an Operational Amplifier

运算放大器电源电压抑制比、开环电压增益和共模抑制比的关系