Design and Analysis of Low Power High Gain Amplifiers for DAC Application

Amplifier is an electronic circuit which amplifies the input signal strength or amplitude. The main concern in designing amplifier is the gain and power dissipation so to review this, the amplifiers compared in this paper include common source amplifier, differential amplifier, operational amplifier with different loads such as resistive load, active load and current mirror. These amplifiers were designed and simulated using mentor graphics tool in 130nm technology. It was found that Differential amplifier with active load using current mirror was having lower power dissipation of 0.376 nW and operational amplifier having the highest gain of 159.42. As OPAMPS’s are having the highest gain (44dB) of all three amplifiers and also when compared with previous works it was used for designing application DAC (digital to analog converter).