A bipolar voltage-controlled tunable filter
- 1 December 1981
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal of Solid-State Circuits
- Vol. 16 (6), 729-737
- https://doi.org/10.1109/JSSC.1981.1051669
Abstract
A complete monolithic state variable filter is described which has been fabricated with bipolar technology. Two-quadrant multipliers are used in a novel fashion to achieve integration time constant large enough for audio purposes. Voltage control of frequency response from 20 Hz to above 20 kHz has been achieved without sacrifice of accuracy (notch depth >50 dB, low-pass and bandpass responses accurate to better than 0.1 dB), dynamic range (>90 dB), power supply rejection (PSRR>40 dB) or frequency drift (<200 ppm//spl deg/C). The design has been shown to be generally useful in the design of self-contained bipolar filters.Keywords
This publication has 5 references indexed in Scilit:
- MOS switched-capacitor filtersProceedings of the IEEE, 1979
- Fully-integrated high-order NMOS sampled-data ladder filtersPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1978
- A precision trim technique for monolithic analog circuitsIEEE Journal of Solid-State Circuits, 1975
- Ultralinear transistor configuration under conditions of minimal power-supply drain currentIEEE Journal of Solid-State Circuits, 1970
- A precise four-quadrant multiplier with subnanosecond responseIEEE Journal of Solid-State Circuits, 1968