High Slew-Rate and Very-Low Output Resistance Class-AB Flipped Voltage Follower Cell for Low-Voltage Low-Power Analog Circuits

Jindal, Caffey; Pandey, Rishikesh

doi:10.1007/s11277-021-09127-2

Cited by 3 publications

(2 citation statements)

References 30 publications

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Section: Introductionmentioning

confidence: 99%

“…The cascode FVF of Figure 1c (denoted here as CONV_CSCFVF) is a class A circuit with a positive slew rate seriously limited by the bias current to a value: SR + = Ibias/CL. Class AB versions of the FVF have also been reported [6][7][8][9] to overcome this limitation to a certain degree. The low-voltage cascode current mirror of Figure 2a (denoted here as CN_CS_CM) has been used for many years as a high-bandwidth linear current amplifier.…”

Section: Introductionmentioning

confidence: 99%

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Class AB Voltage Follower and Low-Voltage Current Mirror with Very High Figures of Merit Based on the Flipped Voltage Follower

Ramírez-Angulo

Paul

Gangineni

et al. 2023

JLPEA

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The application of the flipped voltage follower to implement two high-performance circuits is presented: (1) The first is a class AB cascode flipped voltage follower that shows an improved slew rate and an improved bandwidth by very large factors and that has a higher output range than the conventional flipped voltage follower. It has a small signal figure of merit FOMSS = 46 MHz pF/µW and a current efficiency figure of merit FOMCE = 118. This is achieved by just introducing an additional output current sourcing PMOS transistor (P-channel Metal Oxide Semiconductor Field Effect Transistor) that provides dynamic output current enhancement and increases the quiescent power dissipation by less than 10%. (2) The other is a high-performance low-voltage current mirror with a nominal gain accuracy better than 0.01%, 0.212 Ω input resistance, 112 GΩ output resistance, 1 V supply voltage requirements, 0.15 V input, and 0.2 V output compliance voltages. These characteristics are achieved by utilizing two auxiliary amplifiers and a level shifter that increase the power dissipation just moderately. Post-layout simulations verify the performance of the circuits in a commercial 180 nm CMOS (Complementary Metal Oxide Semiconductor) technology.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Class AB Voltage Follower and Low-Voltage Current Mirror with Very High Figures of Merit Based on the Flipped Voltage Follower

Ramírez-Angulo

Paul

Gangineni

et al. 2023

JLPEA

View full text Add to dashboard Cite

show abstract

A novel low-input-resistance, high-output-resistance and wide-bandwidth current mirror using class-AB FVF cell

Jindal

Pandey

2021

Sādhanā

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Impedance-mode capacitance multiplier with OTA-based flipped voltage follower for high accuracy and large multiplication factor

Padilla-Cantoya

Gurrola-Navarro

Bonilla-Barragan

et al. 2022

IEICE Electron. Express

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A capacitance multiplier with large multiplication factor, increased accuracy, and class AB operation is presented. The multiplier is an impedance mode implementation consisting of a Flipped Voltage Follower based on Operational Transconductance Amplifiers (OTA). This gives the possibility to offer rail-to-rail operation and class AB operation to drive demanding loads depending on the application. In addition, one of the OTAs is designed to offer a transconductance gain based on passive resistors and achieve increased accuracy in the multiplication factor by means of proper layout techniques. The circuit was implemented in a 0.5µm technology and has multiplication factors of 10, 100, 1k and 10k, a power dissipation of 0.56 mW and a silicon area of 0.059 mm 2 . Simulation and experimental results of the multiplier demonstrate the proper operation.

show abstract

High Slew-Rate and Very-Low Output Resistance Class-AB Flipped Voltage Follower Cell for Low-Voltage Low-Power Analog Circuits

Cited by 3 publications

References 30 publications

Class AB Voltage Follower and Low-Voltage Current Mirror with Very High Figures of Merit Based on the Flipped Voltage Follower

Class AB Voltage Follower and Low-Voltage Current Mirror with Very High Figures of Merit Based on the Flipped Voltage Follower

A novel low-input-resistance, high-output-resistance and wide-bandwidth current mirror using class-AB FVF cell

Impedance-mode capacitance multiplier with OTA-based flipped voltage follower for high accuracy and large multiplication factor

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