An Uncooled Infrared Focal Plane Array Readout Circuit

A focal plane array and uncooled infrared technology, which is applied in the field of infrared imaging, can solve the problems of increasing the absolute value of the response rate of the readout circuit and the output voltage exceeding the dynamic range, etc., and achieve the effect of eliminating the change of the response rate and eliminating the change

Active Publication Date: 2021-09-21
HANGZHOU HIKMICRO SENSING TECH CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the substrate temperature is strictly controlled, when the detector is at a high temperature, as the substrate temperature increases, the absolute value of the responsivity of the output of the readout circuit will increase, which in turn will cause the output voltage to exceed the dynamic range.

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
  • An Uncooled Infrared Focal Plane Array Readout Circuit
  • An Uncooled Infrared Focal Plane Array Readout Circuit
  • An Uncooled Infrared Focal Plane Array Readout Circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with this specification. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present specification as recited in the appended claims.

[0022] The terms used in this specification are for the purpose of describing particular embodiments only, and are not intended to limit the specification. As used in this specification and the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the t...

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

This specification provides an uncooled infrared focal plane array readout circuit, the readout circuit includes an M*N array circuit and a mirror circuit, and the readout circuit also includes: for the M*N array circuit and The mirror circuit respectively provides a bias generating device for a dynamic bias voltage, and the bias generating device includes: a sensing resistor whose resistance value varies linearly with changes in the temperature of the substrate on the readout circuit; A voltage generation module, configured to generate a dynamic bias voltage related to the resistance value according to the preset fixed bias voltage and the resistance value of the sensing resistor, so as to provide the pixel and all the pixels in the M*N array circuit A dynamic bias voltage is provided across the sensor resistor in the mirror circuit described above. In this way, the influence of the change of the substrate temperature on the output voltage responsivity of the readout circuit is reduced, thereby avoiding the problem that the output voltage of the uncooled infrared focal plane array detector exceeds the dynamic range at high temperature.

Description

technical field [0001] This specification relates to the field of infrared imaging technology, and in particular to an uncooled infrared focal plane array readout circuit. Background technique [0002] At present, uncooled infrared imaging technology has important applications in security, industry and agriculture, medicine, astronomy and other fields. As the core of the uncooled infrared imaging technology, the infrared focal plane array includes two parts: an infrared detector array and a readout circuit. Among them, the microbolometer focal plane array (FPA) has high sensitivity and is the most widely used uncooled infrared focal plane array. Its working principle is that the temperature of the heat-sensitive material changes after absorbing the incident infrared radiation, thereby It causes the change of its own resistance value, and detects the magnitude of the infrared radiation signal by measuring the change of its resistance value. [0003] Microbolometers generall...

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
Patent Type & AuthorityPatents(China)
IPC IPC(8): G01J5/24
CPCG01J5/24G01J2005/0077G01J2005/202
Inventor刘俊何佳
OwnerHANGZHOU HIKMICRO SENSING TECH CO LTD