TOCA-based electronically-tunable continuous-time filters
Journal
International Journal of Electronics
Journal Volume
71
Journal Issue
2
Pages
253-264
Date Issued
1991
Author(s)
Abstract
A new CMOS translinear operational current amplifier (TOCA) and continuous-time ladder filters using the proposed TOCAs are presented. The TOCA based integrators provide better high frequency properties and require less capacitance compared with their counterparts which use conventional operational amplifiers. A sixth-order band-pass ladder filter with centre frequency 455 kHz, 0-5 dB ripple, and 80kHz bandwidth is simulated. A third-order electronically tunable low-pass ladder filter with 0-3 dB ripple and a biquad filter with low-pass and band-pass outputs are experimentally demonstrated using TOCAs which are realized with discrete components. The techniques will be useful for monolithic integration in the analogue filtering circuits. © 1991 Taylor & Francis, Ltd.
SDGs
Other Subjects
Amplifiers, Operational; Electric Filters, Bandpass; Integrated Circuits, Monolithic; Analog filters; Biquad filters; Continuous-time filters; Ladder filters; Electric Networks
Type
journal article