论文信息 - Electronically tunable active filters with operational transconductance amplifiers

Electronically tunable active filters with operational transconductance amplifiers

The design of voltage- or current-controlled active filters with operational transconductance amplifiers (OTA's) is much less expensive than with analog multipliers. This paper presents some experimental results on known circuits and a new configuration which allows the electronic control of the absolute bandwidth of a biquad circuit.

Henrique S. Malvar

[1] Kenneth R. Laker,et al. Effects of excess phase in multiple-feedback active filters , 1980 .

[2] G JungW. 正パルストリガで負出力を出す555ワンショットマルチバイブレータ回路 | 文献情報 | J-GLOBAL 科学技術総合リンクセンター , 1976 .

[3] L. Bruton. Electronically tunable analog active filters , 1972 .

[4] J. B. Grimbleby. Simple electronically tunable 2nd-order active filter , 1977 .

[5] A. S. Sedra,et al. Programmable active filters [spectrum analyzer application] , 1973 .

[6] L. P. Huelsman,et al. State-Variable Synthesis for Insensitive Integrated Circuit Transfer Functions , 1967 .

[7] L. Thomas,et al. The Biquad: Part I-Some practical design considerations , 1971 .

[8] C. H. Coker,et al. Synthetic voices for computers , 1970, IEEE Spectrum.

[9] J. Tow. Active RC filters—A state-space realization , 1968 .