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Title: An improved tuning circuit for continuous-time filters
Authors: Jiun, F.S.
Tan, K.-S.
Fu, L.M. 
Issue Date: 1997
Citation: Jiun, F.S.,Tan, K.-S.,Fu, L.M. (1997). An improved tuning circuit for continuous-time filters. International Symposium on IC Technology, Systems and Applications 7 : 474-477. ScholarBank@NUS Repository.
Abstract: An improved automatic tuning circuit is presented in this paper. It has been incorporated into a 5th order elliptic filter using1.2μm double-poly double-metal CMOS technology. This tuning circuit is simpler in design when compare to the traditional counterpart - Phase Locked Loop tuning circuit. It takes advantage of the excellent component matching capability in CMOS technology and exploits the property of switched capacitor circuit to track the time constants in both the tuning circuit and the filter. The tuning range of the filter can be varied from 300KHz to 900KHz by varying the external clock frequency. The stopband rejection of the filter is measured to be greater than 70dB and the passband ripple is better than ±0.05dB.
Source Title: International Symposium on IC Technology, Systems and Applications
Appears in Collections:Staff Publications

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