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Infrared focal plane read-out circuit unit circuit

A technology of infrared focal plane and unit circuit, which is applied in the direction of electric radiation detector to achieve the effect of reducing noise, reducing power consumption and saving unit area

Inactive Publication Date: 2008-09-10
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

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Embodiment Construction

[0037] like figure 1 As shown, a unit circuit of an infrared focal plane readout circuit includes:

[0038] The integral capacitor selection unit 1 is connected between the first node A1 and the third node A3, and controls the output size of the integral voltage by selecting the size of the integral capacitor of the unit circuit; the first node A1 is used for receiving the output signal of the infrared detector;

[0039] The integration / reset control unit 2 is connected between the first node A1 and the third node A3. The control unit circuit works in the integration or reset state. In the integration state, the unit circuit integrates the output signal of the infrared detector. In the reset state, The unit circuit resets the integrating capacitor;

[0040] 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. A single-stage amplifier is u...

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PUM

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Abstract

The invention discloses a unit circuit of an infrared focal plane reading-out circuit, which is characterized in that the unit circuit comprises an integral capacitor selection unit, an integral / reset control unit, an input amplifier, a sampling keeping unit and a source following unit. The unit circuit utilizes the reset of the integral / reset control unit to provide constant infrared detector bias voltage inside the unit circuit, without requirement of external bias voltage; most transistors adopt P-typed MOS pipes, thus effectively reducing the noise of the unit circuit; a differential amplifier is replaced by a single-step amplifier, the power loss of the unit circuit is reduced, and the unit area is saved; two capacitor values are designed to be selected, thus meeting the requirement of different background conditions; the integral time can be suitably selected according to the current of different detectors.

Description

technical field [0001] The invention relates to a unit circuit of an infrared focal plane readout circuit in an infrared imaging system, belonging to the technical field of microelectronics and optoelectronics. Background technique [0002] Infrared imaging technology is increasingly widely used in military, space technology, medicine and related fields of national economy. Infrared focal plane array components are the core optoelectronic devices for acquiring infrared image signals in infrared imaging technology. The assembly consists of an infrared detector and an infrared focal plane readout circuit (ROIC: readout integrated circuits). With the continuous expansion of the scale of infrared focal plane array components, the infrared focal plane readout circuit, which is an important part of the infrared focal plane array, must meet both high performance and low power consumption. [0003] The basic function of the ROIC circuit is to convert, amplify and transmit the infr...

Claims

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Application Information

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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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