Low-Voltage Transconductor with Wide Input Range and Large Tuning Capability  

作　　者：孔耀晖 杨宏 蒋明 徐淑正 杨华中 

机构地区：[1]The First Research Institute of the Ministry of Public Security [2]Department of Electronic Engineering,Tsinghua University

出　　处：《Tsinghua Science and Technology》2011年第1期106-112,共7页清华大学学报（自然科学版（英文版）

摘　　要：A CMOS triode transconductor was developed with common mode feedback suitable for operating in low-voltage and low-power applications. The design is based on a body-driven input stage with feedback loops to extend both the signal input range and the tuning capability. The effective transconductance of the body-driven triode stage is increased using a partial positive feedback technique which also partially solves the problem introduced by the small transconductance. This design uses the UMC 0.18 μm CMOS process. Simulations show the transconductor operated with 1 V supply voltage has less than -55 dB total harmonic distortions （THD） in the complete tuning range （0 V≤ Vcont≤ 0.43 V） for a 1 MHz 0.8 Vp-p differential input. The power consumption is 70 μW for a 0.43 V control voltage.A CMOS triode transconductor was developed with common mode feedback suitable for operating in low-voltage and low-power applications. The design is based on a body-driven input stage with feedback loops to extend both the signal input range and the tuning capability. The effective transconductance of the body-driven triode stage is increased using a partial positive feedback technique which also partially solves the problem introduced by the small transconductance. This design uses the UMC 0.18 μm CMOS process. Simulations show the transconductor operated with 1 V supply voltage has less than -55 dB total harmonic distortions （THD） in the complete tuning range （0 V≤ Vcont≤ 0.43 V） for a 1 MHz 0.8 Vp-p differential input. The power consumption is 70 μW for a 0.43 V control voltage.

关 键 词：LOW-VOLTAGE CMOS TRANSCONDUCTOR wide input range 

分 类 号：TN386.1[电子电信—物理电子学]