IRFPA (Infrared Focal Plane Array) and read-out circuit thereof
A technology of infrared focal plane and readout circuit, which is applied in the field of infrared focal plane array and infrared focal plane array readout circuit, can solve the problems of high working performance, low power consumption and low complexity of the readout circuit, and achieve The effect of low power consumption
Active Publication Date: 2012-06-27
北方广微科技有限公司
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Problems solved by technology
[0009] The purpose of the present invention is to provide an infrared focal plane array readout circuit to solve the problems in the prior art that it is difficult to combine high performance, low power consumption and low complexity
[0010] Another object of the present invention is to provide an infrared focal plane array to solve the problem that its readout circuit has high performance, low power consumption, and low complexity.
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[0030] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0031] First of all, it should be noted that some reference signs will be simplified without affecting the clarity of the description of the present invention, for example figure 2 The first first-stage analog output buffer shown is referenced buffer1, and subsequent first-stage analog output buffers are only labeled - ; In addition, in order to meet the needs of some parts describing the whole part or some parts describing the individual parts, the names of some parts may also be changed. For example, in some places below, the first stage switch I2 will be called switch S0 or S0 , S0-S0 .
[0032] Such as figure 2 As shown, the infrared focal plane array readout circuit of the present invention includes a column control signal generation logic (not shown in the figure), an output node OUT, and N+1 amplifiers I1 for amplifying...
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The invention discloses an IRFPA (Infrared Focal Plane Array) and a read-out circuit thereof. The read-out circuit comprises output nodes, N+1 amplifiers, N+1 primary switches and a column control signal generating logic and also comprises M+1 output buses and M+1 primary analog output buffers, wherein the N+1 amplifiers are uniformly divided into M+1 groups, one amplifier of each group of amplifiers is respectively connected to each output bus through a primary switch, the input ends of the M+1 primary analog output buffers are respectively connected to the M+1 output buses, the output ends of the M+1 primary analog output buffers are respectively connected with the output nodes through secondary switches; and the control signals of the primary switches and the secondary switches are generated by a column control signal generating module, wherein M and N are natural numbers, and N+1 is the integral multiple of M+1. An analog voltage can be accurately output to the outside of a chip at a high speed, and power consumption is lower.
Description
technical field [0001] The present invention relates to the technical fields of microelectronics and optoelectronics, in particular to an infrared focal plane array (infrared focal plane array) readout integrated circuit, and in particular to an infrared focal plane array with the readout circuit. Background technique [0002] Infrared imaging technology has important applications in military, industry and agriculture, medicine, astronomy and other fields. The infrared focal plane array, which is the core of infrared imaging technology, includes two parts: an infrared detector array and a readout circuit. The function of the detector array is to realize photoelectric conversion, and the function of the readout circuit is to complete the processing and readout of pixel signals. Among them, the readout circuit has an important influence on the performance of the infrared imaging system. [0003] The existing infrared focal plane array readout circuit such as figure 1 As sho...
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IPC IPC(8): G01J5/10G01J5/02
Inventor 刘俊雷述宇
Owner 北方广微科技有限公司