Title :
1.5 V 5.0 MHz switched capacitor circuits in 1.2 μm CMOS without voltage bootstrapper
Author :
Wang, Lei ; Embabi, S.H.K. ; Sanchez-Sinencio, Edgar
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
Abstract :
A fully-differential switched capacitor (SC) bandpass biquad and a 4th order bandpass Δ-Σ modulator were designed and fabricated in 1.2 μm CMOS process. The supply voltage is 1.5 V without using any voltage bootstrapper. The clock frequency is 5.0 MHz in both circuits. The bandpass filter had Q=8.0 and IM3=-52 dB at its central frequency of 833 KHz. The 4th order bandpass Δ-Σ modulator had SNR=61 dB and IM3<-78 dB in its narrowband of 25 KHz centered at the central frequency of 1.25 MHz
Keywords :
CMOS analogue integrated circuits; band-pass filters; biquadratic filters; delta-sigma modulation; low-power electronics; switched capacitor filters; 1.2 micron; 1.5 V; 5.0 MHz; CMOS chip; auto-zeroed integrator; central frequency; clock frequency; fourth-order band-pass delta-sigma modulator; fully-differential switched-capacitor band-pass biquad filter; low-voltage circuit; CMOS process; CMOS technology; Circuit testing; Clocks; Frequency; Low voltage; Switched capacitor circuits; Switches; Switching circuits; Threshold voltage;
Conference_Titel :
Custom Integrated Circuits, 2001, IEEE Conference on.
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-6591-7
DOI :
10.1109/CICC.2001.929715
