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Fully differential operational amplifier modular circuit, analog-to-digital converter and readout integrated circuit

An operational amplifier, fully differential technology, applied in the field of uncooled infrared focal plane array, which can solve the problems of unacceptable circuit design and increase of integral capacitor area.

Inactive Publication Date: 2014-12-31
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in order to increase the area of ​​the integrating capacitor, complex circuit design is not allowed in ROIC

Method used

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  • Fully differential operational amplifier modular circuit, analog-to-digital converter and readout integrated circuit
  • Fully differential operational amplifier modular circuit, analog-to-digital converter and readout integrated circuit
  • Fully differential operational amplifier modular circuit, analog-to-digital converter and readout integrated circuit

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Embodiment Construction

[0027] The specific structure of the fully differential operational amplifier module circuit of the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] figure 1 It is a schematic structural diagram of a fully differential operational amplifier module circuit according to an embodiment of the present invention.

[0029] Such as figure 1 As shown, in one embodiment of the present invention, a fully differential operational amplifier module circuit includes a folded cascode fully differential operational amplifier 10 and a clock feedthrough frequency compensation circuit 20 . The input stage of the folded cascode fully differential operational amplifier 10 includes a bias circuit having a bias input terminal nbias1. The clock feedthrough frequency compensation circuit 20 includes a capacitive element. One end of the capacitive element is connected to the bias input terminal nbias1 of the folded cascode full...

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PUM

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Abstract

An embodiment of the invention discloses a fully differential operational amplifier modular circuit which comprises a folded-cascade fully differential operational amplifier and a clock feed-through frequency compensation circuit. The clock feed-through frequency compensation circuit comprises a capacitive element. One end of the capacitive element is connected to a bias voltage input end of the folded-cascade fully differential operational amplifier, and the other end of the capacitive element is connected to clock signals CLK. The clock signals CLK are inputted to the bias voltage input end in a feed-through manner via the capacitive element, so that voltages at the bias voltage input end nbias1 can be changed. The fully differential operational amplifier modular circuit in the embodiment of the invention has the advantages that the fully differential operational amplifier modular circuit is additionally provided with the clock feed-through frequency compensation circuit with the capacitive element and control clock signals CLK and accordingly is good in step response and stable in setup time, and excellent frequency compensation effects can be realized for the fully differential operational amplifier.

Description

[0001] Technical field [0002] The invention involves the field of non -refrigerated infrared focus plane technology, especially the module circuit of a full differential computing amplifier module, the modulus converter using the full differential computing amplifier module circuit, and the non -refrigerated infrared focus plane using the module converterReading circuit of the array. [0003] Background technique [0004] Non -cooling infrared focus plane array detectors can work at room temperature without the need to refrigerate equipment, and have the advantages of light quality, small volume, long life, low cost, small power consumption, fast startup and good stability, etc., which meets the civil infrared system of civilian infrastructure systems.And some military infrared systems are urgently needed for long wave infrared detectors.As a result, this technology has been rapidly developed and widely used. [0005] Reading the circuit (ROIC) is one of the key components of t...

Claims

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Application Information

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IPC IPC(8): H03F3/45H03M1/12
Inventor 吕坚魏林海周云
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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