Design of CMOS instrumentation amplifier with improved gain & CMRR for low power sensor applications

IC 741 a nd IC AMP02FP Based Signal Conditioning Circuit f or Electrostatic Sensor u sing Multisim

“…The instrumentation amplifier furnishes low noise, high input impedance and high CMRR. For wider range of noise detection applications instrumentation amplifiers are used [6]. The gain of the two-stage signal conditioning circuit is given by…”

Design of CMOS Instrumentation Amplifier Using Three-Stage Operational Amplifier for Low Power Signal Processing

“…CMOS Integration technique has various benefits such as it reduces power consumption, requires lesser chip area comparison to Op-Amp based circuit, faster operation with high accuracy with improved CMRR performance and higher gain. The previous works [1] on two-stage Operational amplifier have some disadvantages if operated at high speed by reducing channel length then gain is reduced. The threestage direct-coupled capacitor compensation linear CMOS operational amplifier is proposed in the further section of this paper which can be used in obtaining better performance of Instrumentation Amplifier.…”

“…In recent times, the instrumentation amplifiers are widely employed in power management of battery-operated portable devices such as mobile phones, etc. This amplified voltage signals that occur at the output of instrumentation amplifier are converted by ADC into digital signal [1]. Further, this digital signal is fed to the microcontroller for digital signal processing.…”