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Infrared focal plane read-out circuit unit circuit

An infrared focal plane, unit circuit technology, applied in the direction of electrical radiation detectors, etc., to achieve the effect of reducing noise, reducing power consumption, and saving unit area

Inactive Publication Date: 2009-12-02
SOUTHEAST UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of the development of focal plane arrays to large-scale and small-unit sizes, its shortcoming becomes more obvious

Method used

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  • Infrared focal plane read-out circuit unit circuit
  • Infrared focal plane read-out circuit unit circuit
  • Infrared focal plane read-out circuit unit circuit

Examples

Experimental program
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Embodiment Construction

[0036] like figure 1 As shown, a unit circuit of an infrared focal plane readout circuit includes:

[0037] Integrating capacitance selection unit 1, connected between the first node A1 and the third node A3, controls the output size of the integral voltage by selecting the size of the integral capacitance of the unit circuit; the first node A1 is used to receive the output signal of the infrared detector;

[0038] Integral / reset control unit 2, connected between the first node A1 and the third node A3, the control unit circuit works in the integral or reset state, the unit circuit integrates the output signal of the infrared detector in the integral state, and in the reset state, The unit circuit resets the integral capacitor;

[0039] The input amplifier 3 is connected between the fourth node A4 and the seventh node A7, the fourth node A4 and the seventh node A7 are respectively connected to the power supply and the ground, adopts a unipolar amplifier, and passes through th...

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PUM

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Abstract

The invention discloses a unit circuit of an infrared focal plane readout circuit, which is characterized in that the unit circuit includes: an integral capacitor selection unit, an integral / reset control unit, an input amplifier, a sample hold unit and a source follower unit. The present invention utilizes the reset of the integration / reset control unit to provide a constant infrared detector bias voltage inside the unit circuit without external bias voltage; most of the transistors use P-type MOS tubes, which effectively reduces the noise of the unit circuit; The single-stage amplifier replaces the differential amplifier, which reduces the power consumption of the unit circuit and saves the unit area; two levels of capacitance are designed for selection, which can meet the needs of different background conditions; the integration time can be adjusted according to different detector currents. selection.

Description

technical field [0001] The invention relates to a unit circuit of an infrared focal plane readout circuit in an infrared imaging system, which belongs to the technical field of microelectronics and optoelectronics. Background technique [0002] Infrared imaging technology is being increasingly widely used in military, space technology, medicine and related fields of national economy. The infrared focal plane array component is the core optoelectronic device for obtaining infrared image signals in infrared imaging technology. The component consists of an infrared detector and an infrared focal plane readout circuit (ROIC: readout integratedcircuits). With the continuous expansion of the scale of infrared focal plane array components, the infrared focal plane readout circuit as an important part must not only meet high working performance, but also require low power consumption. [0003] The basic function of the ROIC circuit is to convert, amplify and transmit the infrared ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J5/20G01J5/24
Inventor 孙伟锋夏晓娟谢亮冯娜陆生礼时龙兴
Owner SOUTHEAST UNIV
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