A Reconfigurable Active-RC Filter with Variable Gain and An RC-Reused Tuning Circuit
- Resource Type
- Conference
- Authors
- Gao, Shan; Chen, Zhi-Jian; Sun, Xiangfeng; Yang, Siyuan; Li, Bin; Lin, Xiao-Ling
- Source
- 2022 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS) Circuits and Systems (APCCAS), 2022 IEEE Asia Pacific Conference on. :355-359 Nov, 2022
- Subject
- Components, Circuits, Devices and Systems
Engineered Materials, Dielectrics and Plasmas
General Topics for Engineers
Wireless communication
Low-pass filters
Bandwidth
Voltage
Receivers
CMOS technology
Harmonic analysis
LPF
active-RC filter
VGA
tuning scheme
- Language
A 3 rd -order reconfigurable fully differential active-RC low pass filter (LPF) is presented in this paper. It provides Butterworth response with tunable 3dB-bandwidth from 200KHz to 40MHz and variable gain from OdB to 30dB in 1dB steps. The Tuning circuit presented in this paper is more area-saving by using the R-C array of the filter instead of additional R-C array. The filter is designed in SMIC 55nm CMOS technology and dissipates 6.5mW for a supply voltage of 1.3V. Post-simulation shows that the 3 rd -order harmonic intercept point (IIP3) is larger than 24.4dBm and spurious-free dynamic range (SFDR) is 57.7dB while the gain and bandwidth of the filter are set to OdB and 14MHz respectively.