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Infrared focal plane array readout circuit and adaptive power consumption regulation method thereof

Inactive Publication Date: 2012-05-09
PEKING UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

Then when a lower master clock frequency is used, the tail current is larger than the actual required current, which will also introduce waste of power consumption

Method used

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  • Infrared focal plane array readout circuit and adaptive power consumption regulation method thereof
  • Infrared focal plane array readout circuit and adaptive power consumption regulation method thereof
  • Infrared focal plane array readout circuit and adaptive power consumption regulation method thereof

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Embodiment Construction

[0034] The present invention will be described in detail below through embodiments.

[0035] The infrared focal plane array readout circuit includes a pixel array, a column line connected to each column of pixels, and a column operational amplifier connected to the column line. by figure 1 (b) The array composed of MxN pixels 1 is taken as an example. The pixels in each column are connected to the same column line, so the MxN array has M column lines L , each column line is connected to a column operational amplifier 2, where M and N are natural numbers.

[0036] In order to turn off the column operational amplifiers outside the range of the readout window, a power consumption control switch tube is added to each column operational amplifier 2, such as figure 2 shown.

[0037] The power consumption control switching tube includes an NMOS transistor M1 and a PMOS transistor M2, wherein, when the input tube is a PMOS tube, M2 is set between the power supply and the gate...

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Abstract

The invention discloses an infrared focal plane array readout circuit with a window readout mode and an adaptive power consumption regulation function, and an adaptive power consumption regulation method thereof. According to the invention, the adaptive power consumption regulation of the focal plane array readout circuit with the window function is realized, tail current sources of a line operational amplifier and an output operational amplifier are respectively designed into a current source array composed of k transistors, and a power-consumption control switching tube is additionally arranged on the line operational amplifier. According to the method disclosed by the invention, the operation can be normally carried out at proper power consumption under the condition of meeting of a speed requirement not matter in a large-window low frame frequency working mode or a small-window high frame frequency working mode, and the power consumption wastes generated in different working modesare effectively avoided during single power consumption design. The infrared focal plane array readout circuit and the adaptive power consumption regulation method in the invention can meet the requirements of a high-resolution portable imaging system and can be widely applied.

Description

technical field [0001] The invention belongs to the technical field of microelectronics and optoelectronics, and in particular relates to an infrared focal plane array readout circuit with window readout mode and adaptive power consumption adjustment and an adaptive power consumption adjustment method thereof. Background technique [0002] Infrared thermal imaging systems are widely used in space, industry and agriculture, medicine, transportation, military and other fields. The core component of the infrared thermal imaging system is the infrared focal plane array (IRFPA: Infrared Focal Plane Array), which includes two parts: the infrared detector array and the readout circuit (ROIC: Readout Integrated Circuit): the function of the detector array is to realize the photoelectric Conversion, the function of the readout circuit is to complete the processing and readout of the pixel signal. Readout circuitry has a significant impact on the performance of infrared imaging syste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/33H04N5/378
Inventor 王冠男鲁文高方然张雅聪陈中建吉利久
Owner PEKING UNIV
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