High-Swing CMOS Cascode Current Mirror Operating with 1V Power Supply Voltage

概要

論文の詳細を見る
A high performance, high-swing CMOS cascode current mirror operating with 1V power supply voltage and using standard CMOS technology is presented. The present circuit employs PMOS source-coupled pair as voltage level shifter to reduce the power supply voltage requirement. The additional advantages of the use of the source-coupled pair are the improved output resistance and the automatic adaptive biasing, thereby enabling the high-swing of output terminal, when used in the cascode configuration. An analytical discussion of the circuit is carried out and the results are confirmed by SPICE simulation. SPICE simulation results show that the input voltage requirement is 370mV and the minimum output voltage requirement is 273mV at the maximum input current of 40μA, whose requirements decrease with decreasing input currents. The output resistance is shown to be greater than 4MΩ at the maximum output current of 40μA, which increases with decreasing output currents. The -3dB bandwidth is shown to be greater than 400MHz and the total harmonic distortion better than -54.34dB at 100kHz at the maximum peak-to-peak input current swing of 40μA. The present circuit will be useful for the low voltage, low power, high-performance mixed analog/digital signal processing.
社団法人電子情報通信学会の論文
1997-06-25