Stage background inhibiting infrared focal plane unit circuit

An infrared focal plane and background suppression technology, which is applied in the field of microelectronics and optoelectronics, can solve the problems of reducing background suppression non-uniformity and high background suppression non-uniformity, so as to reduce background suppression non-uniformity and improve the ability to detect weak signals , high linearity effect

Inactive Publication Date: 2010-01-27
江苏佳源铝业有限公司 +1
View PDF0 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of high non-uniformity of background suppression between existing unit circuits in the infrared readout circuit, and to provide a staged background suppression infrared focal plane unit circuit to effectively reduce the backgro

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Stage background inhibiting infrared focal plane unit circuit
  • Stage background inhibiting infrared focal plane unit circuit
  • Stage background inhibiting infrared focal plane unit circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] see figure 2 , The unit circuit of the present invention consists of four parts, which are respectively an injection circuit 1, an integrating capacitor circuit 2, a background subtracting current circuit 3, and a row selection control circuit 4. Among them, the injection circuit 1 includes a P-type MOS transistor M INT , forming an injection tube; the integral capacitor circuit 2 contains an N-type MOS tube M as a reset switch RST , integrating capacitance C INT ; The background subtracting current circuit 3 contains an N-type MOS tube M 1 , as a switch N-type MOS tube M 2 And N-type MOS tube M 3 ; The row selection control circuit 4 contains an N-type MOS transistor M RSEL , forming a row selection switch tube.

[0023] The circuit connection relationship is as follows: P-type MOS tube M INT The source of the infrared controller is connected to the output terminal A1 of the infrared controller; the P-type MOS tube M INT The drain, N-type MOS tube M RST The d...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a stage background inhibiting infrared focal plane unit circuit which is characterized by comprising an injection circuit, an integrating capacitor circuit, a background subtracting current circuit and a row selection control circuit, wherein the output end of an infrared detector is connected with the input end of the injection circuit; the output end of the injection circuit is connected with the input end of the integrating capacitor circuit; the output end of the integrating capacitor circuit and the output end of the background subtracting current circuit are connected with the input end of the row selection control circuit; the output end of the row selection control circuit is connected with a following signal processing circuit; the first input end and the second input end of the background subtracting current circuit are respectively connected with bias voltage VB1 and bias voltage VB2; and the charge accumulated on an integrating capacitor by background current is subtracted by the stage conduction of the background subtracting current circuit in the process of integration so as to realize background inhibition.

Description

technical field [0001] The invention relates to a readout circuit in an infrared imaging system, in particular to a staged background suppression infrared focal plane unit circuit, which belongs to the technical field of microelectronics and optoelectronics. Background technique [0002] Infrared imaging technology, also known as thermal imaging technology, is a technology that uses the property that any object above absolute zero emits infrared rays to convert invisible infrared radiation into visible images. The infrared imaging device converts the self-radiation difference (thermal image) of the scene into a visible light image by means of a detector sensitive to infrared radiation (ie, an infrared detector), thereby extending the human visual range to the infrared band. At present, 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 a key...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01J5/02G01J5/06H04N5/33
Inventor 夏晓娟周杨帆谢亮刘思超孙伟锋陆生礼时龙兴
Owner 江苏佳源铝业有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap