Enhanced DC gain amplifier using no miller capacitor feedforward compensation

Ortiz, Héctor Iván Gómez

doi:10.1109/lascas.2013.6519007

Cited by 2 publications

(1 citation statement)

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“…This paper presents the design of a robust to PVT variations operational transconductance amplifier with feedforward frequency compensation which is an extended version of the work in [3]. The proposed amplifier avoids the connection of the feedforward path directly to the output by using current mirrors which enhances output impedance.…”

Section: Introductionmentioning

confidence: 99%

Robust to PVT enhanced DC gain amplifier using no Miller capacitor feedforward compensation

Ortiz

2014

Analog Integr Circ Sig Process

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This paper presents an operational transconductance amplifier compensated in frequency with a feedforward path implemented with current mirrors. This concept eliminates the need of Miller capacitor and improves performance compared to traditional feedforward topologies in regard to DC gain. Gain enhancement is achieved because of the use of current mirrors which reduces the number of the conductances that are connected to the output and increasing output impedance. Moreover, common mode range is improved by the PMOS differential pair used in the feedforward stage. Simulations results for the designed circuit on the typical UMC 180 nm CMOS process, show a DC gain above 60 dB with a unity gain frequency of 511 MHz, a phase margin (PM) of 49 , a slew rate (SR) of 205 V/ls and a power consumption of 5.1 mW maintaining low variations in regard to process, voltage and temperature variations.

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Section: Introductionmentioning

confidence: 99%