ScholarLens Back to search
2016•Unpublished venueRequires access

The method of speeding of the operational amplifiers based on the folded cascode

Nikolay N. Prokopenko, I. V. Pakhomov, Anna V. Bugakova, Nikolay Butyrlagin

Open publisher page 14 citations

Abstract

The new architectures of the high-speed operational amplifier (op-amp) based on the complementary folded cascodes (FCs), which form the intermediate stage of op-amp, are suggested. In the folded cascode the circuit techniques, excluding the traditional limitations of its output current, which recharges the balancing capacitor of op-amp, are provided. It increases the maximum slew rate of op-amp (SR) by a factor of 4-5. It is recommended to use class AB differential amplifiers as an input stage of op-amp. When realizing the op-amp on the Zarlink process, the maximum slew rate is more than 20000 V/μs. Besides, other parameters of the transient (the stability, the oscillability, the maximum overshoot, the dependence of SR on the impulse input signal amplitude, etc.) don't worsen. The circuit of op-amps is realized within the classical technologies, including BiJ, BiFET, CMOS.

About this research paper

What this paper is about

The new architectures of the high-speed operational amplifier (op-amp) based on the complementary folded cascodes (FCs), which form the intermediate stage of op-amp, are suggested. In the folded cascode the circuit techniques, excluding the traditional limitations of its output current, which recharges the balancing capacitor of op-amp, are provided. It increases the maximum slew rate of op-amp (SR) by a factor of 4-5. It is recommended to use class AB differential amplifiers as an input stage of op-amp. When realizing the op-amp on the Zarlink process, the maximum slew rate is more than 20000 V/μs. Besides, other parameters of the transient (the stability, the oscillability, the maximum overshoot, the dependence of SR on the impulse input signal amplitude, etc.) don't worsen. The circuit of op-amps is realized within the classical technologies, including BiJ, BiFET, CMOS.

Why it matters

OpenAlex reports 14 citations for this work. Citation counts describe recorded attention and do not establish research quality.

Key contribution

A contribution statement is not available in the OpenAlex record.

Method / approach

Method details are not available in the OpenAlex metadata.

Main findings

Findings are not separately available in the OpenAlex metadata.

Limitations

Limitations are not available in the OpenAlex metadata.

Applications

Application details are not available in the OpenAlex metadata.

Available abstract

The new architectures of the high-speed operational amplifier (op-amp) based on the complementary folded cascodes (FCs), which form the intermediate stage of op-amp, are suggested. In the folded cascode the circuit techniques, excluding the traditional limitations of its output current, which recharges the balancing capacitor of op-amp, are provided. It increases the maximum slew rate of op-amp (SR) by a factor of 4-5. It is recommended to use class AB differential amplifiers as an input stage of op-amp. When realizing the op-amp on the Zarlink process, the maximum slew rate is more than 20000 V/μs. Besides, other parameters of the transient (the stability, the oscillability, the maximum overshoot, the dependence of SR on the impulse input signal amplitude, etc.) don't worsen. The circuit of op-amps is realized within the classical technologies, including BiJ, BiFET, CMOS.

Key concepts: Slew rate, Cascode, Operational amplifier, Capacitor, Amplifier, Overshoot (microwave communication), Transient response, CMOS

Related papers

Related paper 1Related paper 2Related paper 3
Back to paper searchBrowse research topicsOriginal source
The method of speeding of the operational amplifiers based on the folded cascode — Research Paper | ScholarLens