Method for inhibiting bias voltage ripples and line output amplifier channel non-uniformity
A bias voltage and column output technology, which is applied in the direction of output power conversion devices and electrical components, can solve the problems of bias voltage ripple and uneven channel of column output amplifiers, and achieve the effect of removing rolling stripes
Inactive Publication Date: 2015-05-13
NANJING UNIV OF SCI & TECH
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[0007] The purpose of the present invention is to provide a method for suppressing the bias voltage ripple and the unevenness of the column output amplifier channel, aiming at the image caused by the noise fluctuating with time on the bias voltage of the microbolometer focal plane output from the outside world Rolling stripes caused by uneven column channel output during row integral sampling can effectively remove rolling stripes on the image
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[0025] The method for suppressing the bias voltage ripple and the channel unevenness of the column output amplifier of the present invention, the steps are as follows:
[0026] In the first step, external radiation is incident on the focal plane of the improved detector, and the photoelectric conversion effect of the focal plane converts the light energy into the form of current, that is, in the standard pixel detector focal plane array based on do The column continuation of pixels around the array so that the original array size becomes , with Sapphire as Extending the material of the background pixel, the entire pixel array is connected to the readout circuit; The value of is selected according to the existing focal plane, where N, M, and n are integers, N is at most 1024, M is at most 1024, and n is generally less than N, so taking half of it is more appropriate. For the following content, take N as 320, M as 240, and n as 160 as an example.
[0027] In the sec...
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The invention discloses a method for inhibiting bias voltage ripples and line output amplifier channel non-uniformity. Outside radiation enters an improved detector focal plane, light energy is converted into a current type through a photoelectric conversion effect of the focal plane, namely, line prolongation of n made on the basis of a detector focal plane array of standard N*M picture elements is positioned around an N*M picture element array to ensure that the size of the original array N*M is changed into (N+n)*M, sapphire is used as materials of n line prolongation background pixel elements, the whole (N+n)*M picture element array is connected with a reading circuit, the reading circuit is used for integrating each frame of image according to the line in accordance with the time sequence requirement for processing a voltage signal to ensure that the final actual output part is kept in a uniform degree, and thus rolling ripples on the images are effectively removed.
Description
technical field [0001] The invention belongs to the hardware calibration technology of a readout circuit of a microbolometer, in particular to a method for suppressing bias voltage ripple and channel unevenness of column output amplifiers. Background technique [0002] Infrared radiation can be detected due to internal interactions in matter, heating effects through photon-to-photon exchange, or through direct electron absorption / internal photoelectron effects. The former absorbs radiation and heats up to increase the temperature. Therefore, the parameters of the detector change with temperature are measured. Such a device is called a square law device; the latter, the valence band electrons in the bandgap semiconductor transition due to direct absorption of photons To the conduction band, so the increase in the number of electrons in the conduction band can be detected. This type of device is called a quantum detector. The most prominent difference between the square law an...
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IPC IPC(8): H02M1/14
Inventor 陈钱许轰烈顾国华隋修宝刘宁季尔优钱惟贤路东明于雪莲张闻文何伟基毛义伟王士绅陈明杰
Owner NANJING UNIV OF SCI & TECH