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Foldable differential-to-single-ended amplifier capable of increasing swing amplitude of output voltage of output end

A differential-to-single-ended, output voltage technology, applied in differential amplifiers, amplifiers with semiconductor devices/discharge tubes, DC-coupled DC amplifiers, etc., can solve the problem of small output voltage swing at the output terminal and achieve large output Effect of Voltage Swing

Pending Publication Date: 2018-11-27
CHONGQING PAIXINRUWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, the main purpose of the present invention is to provide a folded differential-to-single-ended amplifier that can increase the output voltage swing at the output end, aiming at solving the problem that the output voltage swing at the output end is smaller in the differential-to-single-ended amplifier

Method used

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  • Foldable differential-to-single-ended amplifier capable of increasing swing amplitude of output voltage of output end
  • Foldable differential-to-single-ended amplifier capable of increasing swing amplitude of output voltage of output end
  • Foldable differential-to-single-ended amplifier capable of increasing swing amplitude of output voltage of output end

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as Figure 4 As shown, a folded differential-to-single-ended amplifier with increased output voltage swing at the output,

[0043] Including MOS tubes M1, M2, M5, M6, M7, M8; transistors M3 and M4; and constant current source;

[0044] The drains of M1 and M2 are connected and then connected to VDD through a constant current source, the sources of M1 and M2 are respectively grounded through a constant current source, and the gates of M1 and M2 are respectively connected to Vin+ and Vin-;

[0045] The source of M3 is connected to the source of M1, the source of M4 is connected to the source of M2; the gates of M3 and M4 are connected, the drains of M3 and M4 are respectively connected to the drains of M7 and M8,

[0046] The gates of M7 and M8 are connected, the gate of M7 is connected to the drain of M7, the sources of M7 and M8 are connected and then connected to VDD;

[0047] The drain of M4 is connected to Vout.

[0048]The present invention reduces one-stage...

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Abstract

The invention discloses a foldable differential-to-single-ended amplifier capable of increasing the swing amplitude of output voltage of an output end. The amplifier comprises a PMOS pair tube and anNMOS pair tube group; the NMOS pair tube group comprises multiple pairs of NMOS pair tubes sequentially connected in series; one pair of pins of the PMOS pair tube are connected with one pair of pinsof the NMOS pair tube group respectively and then separately grounded through a constant current source, and the other pair of pins of the PMOS pair tube are connected to each other and then connectedto the other pair of pins of the NMOS pair tube group through the constant current source. The swing amplitude of the output voltage of the output end in the differential-to-single-ended amplifier can be increased.

Description

technical field [0001] The invention belongs to the technical field of integrated circuit design, and in particular relates to a folded differential-to-single-ended amplifier whose output terminal can increase the output voltage swing. Background technique [0002] The input signal of the differential-to-single-ended operational amplifier is a differential signal, and the output signal is a single-ended signal. Because it shows better advantages in terms of noise, voltage swing, bandwidth frequency, and unity gain, it is often used as a high-speed amplifier. It is synonymous with performance, and because it can convert a pair of differential signals into a single signal, it can be used in some special-needed circuits. Traditional differential-to-single-ended amplifiers commonly include single-stage and two-stage amplifiers, and single-stage op amps can also be divided into simple differential-to-single-ended amplifiers, sleeve-type cascodes and folded cascodes. Three struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/45
CPCH03F3/45417H03F2203/45126
Inventor 唐枋
Owner CHONGQING PAIXINRUWEI TECH CO LTD
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