New concept of a Gm tuning circuit for voltage- or current-controlled transconductance circuits

Akira Hyogo, Keitaro Sekine

Research output: Contribution to conferencePaper

Abstract

A new concept of a transconductance (Gm) tuning circuit using switched-capacitor (SC) circuits for voltage- or current-controlled transconductance circuits is proposed. This concept uses an integrator which is controlled by time (or frequency) as a current-to-voltage converter for tuning. The Gm can be determined by the integrated time of the current from the transconductance circuit, the integration capacitor and the reference voltage(s). Moreover, the Gm control voltage produced by the proposed circuit has no ripple. The proposed circuit can tune operational transconductance amplifiers, MOS resistive circuits and so on. Finally, an offset voltage cancellation technique for the integrator is shown. SPICE simulations are performed to verify the performance of the proposed circuits.

Original languageEnglish
Pages581-586
Number of pages6
Publication statusPublished - 1 Dec 1994
EventProceedings of the 1994 IEEE Asia-Pacific Conference on Circuits and Systems - Taipei, Taiwan
Duration: 5 Dec 19948 Dec 1994

Conference

ConferenceProceedings of the 1994 IEEE Asia-Pacific Conference on Circuits and Systems
CityTaipei, Taiwan
Period5/12/948/12/94

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Hyogo, A., & Sekine, K. (1994). New concept of a Gm tuning circuit for voltage- or current-controlled transconductance circuits. 581-586. Paper presented at Proceedings of the 1994 IEEE Asia-Pacific Conference on Circuits and Systems, Taipei, Taiwan, .