Reading circuit based on relaxor ferroelectric monocrystal pyroelectric detector

A technology for reading out circuits and detectors, applied in the direction of electrical radiation detectors, etc., can solve the problems of low operating frequency of circuits, nonlinear output signals, etc., and achieve the effect of good linearity and uniformity, and low noise.

Inactive Publication Date: 2010-08-18
NANTONG UNIVERSITY
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Problems solved by technology

The detector bias of this structure is determined by the reset level, but the bias will change with the integration time and the integration current, which will cause the detector bias to change, and the SFD (source follower type) readout circuit is in the middle and high In the background, there is a serious problem of output signal non-linearity, and the operating frequency of the circuit is also low

Method used

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  • Reading circuit based on relaxor ferroelectric monocrystal pyroelectric detector
  • Reading circuit based on relaxor ferroelectric monocrystal pyroelectric detector
  • Reading circuit based on relaxor ferroelectric monocrystal pyroelectric detector

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with drawings and embodiments.

[0032] The circuit module of the present invention such as figure 1 As shown, it is mainly composed of a CTIA (capacitance feedback mutual conductance) input stage circuit module, a double sampling and holding circuit module, and a multiplex transmission circuit module, and the above modules are integrated on an integrated circuit chip. CTIA (capacitance feedback mutual conductance) input stage circuit module converts the output current signal of the relaxor ferroelectric detector into a voltage signal and transmits it to the input terminal of the double sampling and holding circuit module. After the double sampling and holding circuit samples and holds the signal, the multi The channel transmission circuit is responsible for turning on each channel one by one.

[0033] The circuit structure of the single-channel CTIA (capacitive feedback mutual conductance) input stag...

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Abstract

The invention relates to a reading circuit based on relaxor ferroelectric monocrystal pyroelectricity, which can realize the outputting of a relaxor ferroelectric monocrystal pyroelectric signal. The output current signal of the relaxor ferroelectric detector is converted into a voltage signal through an CTIA input-stage circuit module, the voltage signal is output after amplification, a double sampling hold circuit samples the signal twice, and a multichannel transmission circuit outputs the signals in each channel after conduction. The circuit modules are integrated on an integrated circuit chip and connected with a detector chip, and the control signal of the circuit modules is provided by an external drive circuit, thus the integrated circuit chip can effectively read the signal of the relaxor ferroelectric detector.

Description

technical field [0001] The invention relates to a detector readout circuit, in particular to a readout circuit of a relaxation ferroelectric single crystal pyroelectric detector. Background technique [0002] In recent years, Chinese scientists have taken the lead in discovering that relaxor ferroelectric single crystal materials have excellent pyroelectric comprehensive properties. Compared with traditional pyroelectric materials, they have very high pyroelectric coefficients, relatively low thermal diffusivity, and comparative Stable chemical properties are very beneficial to the storage and processing of thermal images and improve lateral resolution, which is very important for infrared imagers; easy processing and thinning can reduce the thickness of crystal components, improve detection capabilities and resolution, and make It is very important to design the matching detector readout circuit if the performance of this material is brought into play and practical. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J5/14
Inventor 景为平王将丁俊民顾勇鲁华祥李言谨
Owner NANTONG UNIVERSITY
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