90dB, 90MHz, 30mW OTA with the gain-enhancement implemented by one- and two- stage amplifiers

Markus Helfenstein, Qiuting Huang, George S. Moschytz

Research output: Contribution to journalConference articlepeer-review

7 Scopus citations

Abstract

The design of simple gain-enhancement configurations for cascode transistors is presented. Applying one- or two-stage differential amplifiers, or an improved regulated cascode configuration in the feedback loop of a cascode, allows high speed and high gain super-transistors at low-voltage to be designed. These concepts were implemented in a symmetrical OTA resulting in a measured 90 dB, 90 MHz, 30 mW amplifier performance for a 14 pF load. Settling measurements to 0.1% error for a unity-gain configuration are presented.

Original languageEnglish
Pages (from-to)1732-1735
Number of pages4
JournalProceedings - IEEE International Symposium on Circuits and Systems
Volume3
StatePublished - 1995
Externally publishedYes
EventProceedings of the 1995 IEEE International Symposium on Circuits and Systems-ISCAS 95. Part 3 (of 3) - Seattle, WA, USA
Duration: 30 Apr 19953 May 1995

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