A CMOS OTA for HF filters with programmable transfer function


Zwan, Eric J. van de and Klumperink, Eric A.M. and Seevinck, Evert (1991) A CMOS OTA for HF filters with programmable transfer function. IEEE journal of solid-state circuits, 26 (11). pp. 1720-1724. ISSN 0018-9200

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Abstract:A CMOS operational transconductance amplifier (OTA) for programmable HF filters is presented. When used in an OTA-C integrator, the unity-gain frequency phase error remains less than 0.3° for frequencies up to more than one tenth of the OTA bandwidth. The OTA has built-in phase compensation, which allows tuning of the transconductance of the OTA (Gm) while maintaining a small phase error. Since this phase error is preserved over the Gm range of the OTA, the OTA is suitable for filters with a programmable transfer function. Using stacked square-law transistors improves the linearity, DC-gain, and power-consumption properties of the OTA
Item Type:Article
Copyright:©1991 IEEE
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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Link to this item:http://purl.utwente.nl/publications/14486
Official URL:https://doi.org/10.1109/4.98994
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