Journal ArticleDOI
An improved frequency compensation technique for CMOS operational amplifiers
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TLDR
In this paper, a two-stage CMOS operational amplifier is proposed to provide stable operation for a much larger range of capacitive loads, as well as much improved V/SUB BB/ power supply rejection over very wide bandwidths for the same basic operational amplifier circuit.Abstract:
The commonly used two-stage CMOS operational amplifier suffers from two basic performance limitations due to the RC compensation network around the second gain stage. First, it provides stable operation for only a limited range of capacitive loads, and second, the power supply rejection shows severe degradation above the open-loop pole frequency. The technique described provides stable operation for a much larger range of capacitive loads, as well as much improved V/SUB BB/ power supply rejection over very wide bandwidths for the same basic operational amplifier circuit. The author presents a mathematical analysis of this new technique in terms of its frequency and noise characteristics followed by its implementation in all n-well CMOS process. Experimental results show 70-dB negative power supply rejection at 100 kHz and an input noise density of 58 nV/(Hz)/SUP 1/2/ at 1 kHz.read more
Citations
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Journal ArticleDOI
A novel feed-forward compensation technique for single-stage fully-differential CMOS folded cascode rail-to-rail amplifier
S. M. Rezaul Hasan,N. Ula +1 more
TL;DR: In this paper, an active and passive mixed feed-forward compensation technique for single-stage CMOS folded-cascode rail-to-rail operational transconductance amplifiers (OTA) is presented.
Proceedings ArticleDOI
A 2.5-V CMOS wideband sigma-delta modulator
TL;DR: This work has been supported by the CEE (ESPRIT IST Project UM1-34283mAMES-2) and the Spanish MCyT and the ERDF (Project TIC2001-0929/ADAVERE).
Dissertation
Energieübertragung für passive Sensor-Transponder mit hoher Reichweite
TL;DR: In this article, a passive sensor transponder with Eingang-and ausgangs-seitige Verhalten is presented, in which an integrierten Schaltung and einer antenne are used.
Journal Article
Minimum Power Miller-Compensated CMOS Operational Ampliers
TL;DR: In this article, a new approach for the design of two-stage Miller-compensated CMOS op amps is presented, which studies the basic relations between power consumption, unity gain bandwidth, biasing region, technology parameters, and the external capacitive load.
Journal ArticleDOI
Program and Verify Word-Line Voltage Regulator for Multilevel Flash Memories
TL;DR: A word-line voltage generator for multilevel (ML) Flash memory programming is presented, using a regulator supplied by an on-chip charge-pump voltage multiplier to provide the voltage required in read and in program mode, thus saving silicon area and minimizing current consumption.
References
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Journal ArticleDOI
MOS operational amplifier design-a tutorial overview
Paul R. Gray,Robert G. Meyer +1 more
TL;DR: In this paper, an overview of current design techniques for operational amplifiers implemented in CMOS and NMOS technology at a tutorial level is presented, focusing on CMOS amplifiers because of their more widespread use.
Journal ArticleDOI
A high performance low power CMOS channel filter
TL;DR: In this article, a new CMOS PCM channel filter is described, which includes transmit and receive filters on a single die, and the chip displays an idle-channel noise of typically 0 dBrnC0, a power supply rejection ratio of 40-50 dB at 1 kHz, and a fully operational power dissipation of only 35 mW.
Journal ArticleDOI
High-performance NMOS operational amplifier
TL;DR: A high performance operational amplifier 300 mil/SUP 2/ in area has been designed and fabricated in a standard n-channel silicon-gate enhancement/depletion MOS process.
Journal ArticleDOI
A single-chip CMOS PCM codec with filters
TL;DR: In this paper, a complete PCM codec using charge redistribution and switched-capacitor techniques is described, implemented in a two-level polysilicon CMOS technology using 23.4 mm/SUP 2/ of active area.
Journal ArticleDOI
Low-Power High-Drive CMOS Operational Amplifiers
TL;DR: Low-power CMOS op amps with high-drive capability and good settling characteristics are described, suitable for applications in such systems as charge-redistribution codecs and switched-capacitor filters.