Programmable Gain and Bandwidth Op-Amp Using Controllable Input Stage Tail Current

Zaidi, Muhaned; Grout, Ian; A’ain, Abu Khari

doi:10.1109/ieecon.2018.8712233

Cited by 2 publications

(2 citation statements)

References 8 publications

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“…The greatest challenge in designing the op-amp is dealing with a situation where power and voltage diminish, prompting a decrease in the performance of the amplifier. For example, reduced power consumption leading to a decreased frequency response performance (such as unity gain frequency (UGF) or slew rate (SR)) at high speed [6, because UGF and SR are current dependent [7].…”

Section: Introductionmentioning

confidence: 99%

Low-voltage Low-power Bulk-driven CMOS Op-Amp Using Negative Miller Compensation for ECG

Zaidi¹

2022

J. Eng. Technol. Sci.

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Two bulk-driven CMOS (Complementary Metal Oxide Semiconductor) operational amplifier (op-amp) designs for electrocardiogram (ECG) application are presented and compared in this paper. Both op-amps are based on two-stage amplification, where bulk-driven differential input is the first stage, while additional DC gain is the second stage. Different compensation techniques were integrated in each op-amp design. Standard Miller compensation was used for the first op-amp parallel with the second stage. The novelty of the second op-amp is that it utilizes negative Miller compensation between the bulk-driven input node and the output node of the first stag, while standard Miller compensation was used in the second stage. The purpose of this work was to compare DC gain, phase margin (PM) and unit gain frequency (UGF) obtained through different simulated compensation strategies and test results. The op-amps were simulated using 0.25 μm CMOS technology. The simulation results are presented using the standard model libraries from Tanner EDA tools, operating on a single rail +0.8V power supply.

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Section: Introductionmentioning

confidence: 99%

Low-voltage Low-power Bulk-driven CMOS Op-Amp Using Negative Miller Compensation for ECG

Zaidi¹

2022

J. Eng. Technol. Sci.

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“…Analog switches represent basic circuits in analog signal processing. They are used in signal routing circuits [3,4], programmable gain amplifiers [5,6], reconfigurable filters [7], switching demodulators [8], sample and hold circuits [9][10][11][12], digital potentiometers [13], and many other circuits.…”

Section: Introductionmentioning

confidence: 99%

Nonvolatile Analog Switch for Low-Voltage Applications

Ilie

Tudoran²,

Neagoe³

et al. 2021

Electronics

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In this paper, a nonvolatile switch based on n-type floating-gate transistors is described. The switch states are programmed through the memory cell floating-gate voltage, allowing higher levels than the application supply. Furthermore, due to its nonvolatile nature, the power consumption is reduced. The on-state resistance, which does not depend on the supply voltage, is one of the greatest advantages of this type of switch in comparison to conventional switches. This benefit can be successfully exploited in low-voltage applications. The switch on-resistance can be increased without the need for increasing the switch area. The characteristics of the proposed switch were confirmed by the experimental results obtained on a test chip fabricated in a 0.18 µm EEPROM process. Measured on-resistance values between 45 and 70 Ω were obtained for a floating-gate voltage of 6.2 V and input source levels below 2 V. The required programming voltage was 18 V. The maximum off-state leakage current was measured at 5 nA.

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Programmable Gain and Bandwidth Op-Amp Using Controllable Input Stage Tail Current

Cited by 2 publications

References 8 publications

Low-voltage Low-power Bulk-driven CMOS Op-Amp Using Negative Miller Compensation for ECG

Low-voltage Low-power Bulk-driven CMOS Op-Amp Using Negative Miller Compensation for ECG

Nonvolatile Analog Switch for Low-Voltage Applications

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