A Double Gain-Boosted Amplifier with Widened Output Swing Based on Signal-and Transient-Current Boosting Technique in CMOS 130-nm Technology

摘要

A modified cascode current-mirror amplifier with double gain-boosting technique is presented in this paper. Signal-and transient-current boosting (STCB) technique is incorporated to further boost the gain of the amplifier, while the characteristic of a single-pole system is retained. Designed in CMOS 130-nm technology, the simulated results show that the output swing can be extended up to 73% and 77% of the positive and negative supply rails, respectively, under supply voltages of ± 0.6V. The proposed amplifier is able to attain a DC gain over 150 dB with its unity-gain frequency (UGF) and phase margin (PM) around 0.67 MHz and 86°, respectively, when it is loaded with a 100 pF output capacitor.