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A CMOS operational amplifier with load- and signal-independent settling time

: Hosticka, B.J.; Klinke, R.; Pfleiderer, H.-J.; Zimmer, G.

Institute of Electrical and Electronics Engineers -IEEE-:
Symposium on VLSI Circuits 1988. Digest of Technical Papers
Piscataway/N.Y., 1988
pp.7-8 : Abb.,Tab.,Lit.
Symposium on VLSI Circuits <Tokyo>
Conference Paper
Fraunhofer IMS ()

In this contribution we present a very high slew-rate CMOS operational amplifier. It uses an additional circuit to inject an extra bias current into a source-coupled CMOS differential input stage in presence of large differential input signals. This measure substantially increases the slew-rate of an operational amplifier for a given quiescent current. We present the circuit principle, its realization, and measurements at the integrated prototype.