Proceedings ArticleDOI
A Low Voltage 100 DB Three-Stage Opamp with Self Bias Technique for Bio Medical Applications.
S. Raparthi Nagulapalli,Sriadibhatla Sridevi,Achalla Surya Bharath +2 more
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TLDR
In this paper, a high gain low voltage three stage Opamp has been discussed and a negative resistance load for the amplifier stages without compromising on dc latch-up issues is used.Abstract:
In this paper, a high gain low voltage three stage Opamp has been discussed. We used a negative resistance load for the amplifier stages without compromising on dc latch-up issues. Nested miller compensation for three stages has been discussed and presented systematic producer to approach the optimal specification space. The proposed circuit is implemented in 65nm CMOS technology and simulated with Spectre. Simulation results shows that the proposed circuit offers 102dBdc gain, 1-MHz unity gain bandwidth under 0.5pF load capacitance. Step response agreed with the frequency response. The circuit consumes $\pmb{346\mu\mathrm{W}}$ from 1V supply and occupying $\pmb{3000\mu \mathrm{m}^{2}}$ silicon area.read more
References
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Journal ArticleDOI
An improved frequency compensation technique for CMOS operational amplifiers
TL;DR: 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.
Journal ArticleDOI
A 100-MHz 100-dB operational amplifier with multipath nested Miller compensation structure
TL;DR: In this paper, a multipath nested structure which overcomes the bandwidth reduction in the conventional nested structure by appending an independent feedforward path for high frequencies is presented, and the two regions of operation can be independently and closely matched, unaffected by variations in the parameters of the IC process in which the amplifier is fabricated.
Book
Frequency Compensation Techniques for Low-Power Operational Amplifiers
TL;DR: The author outlines the basic Frequency Compensation of Integrated Circuits and some of the techniques used to derive Multipath Compensation Techniques, as well as some new techniques developed in the last few years.
Journal ArticleDOI
Design techniques for cascoded CMOS op amps with improved PSRR and common-mode input range
D.B. Ribner,M.A. Copeland +1 more
TL;DR: In this paper, two circuits are presented that overcome the power-supply rejection ratio (PSRR) problems of the earlier amplifier: one for virtual ground applications such as switched-capacitor integrators, the other for buffer applications requiring wide common-mode input range.
Journal ArticleDOI
A high-swing CMOS telescopic operational amplifier
Kush Gulati,Hae-Seung Lee +1 more
TL;DR: In this paper, a high-swing, high-performance CMOS telescopic operational amplifier is described, which employs the tail and current source transistors in the deep linear region to achieve high swing of the op-amp.