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Transimpedance amplifier with gain bootstrap function

A technology of transimpedance amplifier and error amplifier, applied in the field of transimpedance amplifier, can solve serious problems such as reducing the bandwidth of transimpedance amplifier, and achieve the effect of bandwidth expansion

Active Publication Date: 2016-04-27
QIANDU TONGCHIP XIAMEN MICROELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0025] The purpose of the present invention is to provide a transimpedance amplifier with a gain bootstrap function, which solves the serious problem that the Miller equivalent capacitance of the gate-drain capacitance of the input tube of the transimpedance amplifier is more serious in reducing the bandwidth of the transimpedance amplifier

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  • Transimpedance amplifier with gain bootstrap function
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  • Transimpedance amplifier with gain bootstrap function

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Embodiment Construction

[0031] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] A transimpedance amplifier with gain bootstrap function, the structure is as figure 2 shown.

[0033] Including error amplifier A0, NMOS transistor MN1, NMOS transistor MN2, NMOS transistor MN3, NMOS transistor MN4, NMOS transistor MN5, NMOS transistor MN6, NMOS transistor MN7, NMOS transistor MN8, NMOS transistor MN9, NMOS transistor MN10, NMOS transistor MN11, current Source I0, current source I1, resistor R0, resistor R1, resistor R2, resistor R3, capacitor C0;

[0034] The drain of the NMOS transistor MN3, the drain of the NMOS transistor MN4, the drain of the NMOS transistor MN5 and one end of the resistor R1 are simultaneously connected to the power supply VDD;

[0035] The gate of the NMOS transistor MN3 is simultaneously connected to the other end of the resistor R1, the drain of the NMOS transistor MN2 and the non-inverting...

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Abstract

The invention discloses a transimpedance amplifier with a gain bootstrap function. The transimpedance amplifier is characterized by comprising an error amplifier A0, an NMOS transistor MN1, an NMOS transistor MN2, an NMOS transistor MN3, an NMOS transistor MN4, an NMOS transistor MN5, an NMOS transistor MN6, an NMOS transistor MN7, an NMOS transistor MN8, an NMOS transistor MN9, an NMOS transistor MN10, an NMOS transistor MN11, a current source I0, a current source I1, a resistor R1, a resistor R2, a resistor R3 and a capacitor C0. The problem that the Miller equivalent capacitance of gate-drain capacitance of an input pipe of a common transimpedance amplifier generates serious influence on the reduction of the bandwidth of the transimpedance amplifier is solved.

Description

technical field [0001] The invention belongs to the technical field of amplifier circuits and relates to a transimpedance amplifier with a gain bootstrap function. Background technique [0002] The optical signal energy will be lost to a certain extent before reaching the photodiode at the far end through the optical fiber. At the far end, a photodiode converts the light intensity into a current at a certain ratio, and this current is amplified and converted into a voltage by a transimpedance amplifier (TIA). TIA design requires trade-offs among noise, bandwidth, gain, supply voltage, and power loss, and presents serious challenges in both CMOS and bipolar technologies. [0003] The invention relates to the design content of a transimpedance amplifier with a gain bootstrapping function. [0004] figure 1 The circuit structure of a commonly used transimpedance amplifier is given. figure 1 Among them, the transimpedance amplifier is composed of a high-gain single-ended NMO...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/08
CPCH03F3/082H03F2200/36
Inventor 李景虎刘德佳陈晓华
Owner QIANDU TONGCHIP XIAMEN MICROELECTRONICS TECH CO LTD
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