A kind of APD array address coding active output circuit
A technology of address encoding and address output, applied in the direction of exclusive-OR circuit, logic circuit with logic function, etc., can solve the problems of slow speed, low power consumption, fast address output speed, etc., and achieve the effect of high efficiency and fast speed
Inactive Publication Date: 2018-04-24
HUAZHONG UNIV OF SCI & TECH
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[0002] At present, the address output technology of APD array mainly includes two types: scanning type and non-scanning type. The scanning address output technology requires a more complex digital timing control circuit, especially for large-scale APD arrays, which has slow speed, high power consumption, and high cost.
The non-scanning address encoding circuit actively outputs the address of the corresponding unit through light detection, and each unit corresponds to a fixed encoding address. The address selection switch is controlled by simple combinational logic. The address output speed is fast and the power consumption is low. Scan output can only realize the output of single pixel address
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[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.
[0021] see figure 1 , The structure adopted in the present invention includes a photodiode 1, an address selection control circuit 2, an address encoding circuit 3 and an address output circuit 4. When the detector is working, each APD is in the working mode of detecting light, that is, the corresponding photodiode converts the light signal into a current signal, and generates a light detection...
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The invention discloses a 2mX2k APD array address code active output circuit, and belongs to the field of APD arrays. Existing non-scanning output can only realize output of a single point pixel address. According to the active output circuit, the output switch of an address code circuit is controlled via an address control circuit, a corresponding image element block head address is outputted via an address output circuit, and four unit addresses are obtained via a subsequent processing circuit so that a complex time sequence control circuit is not required, efficiency is high and speed is high.
Description
technical field [0001] The invention belongs to the field of avalanche photodiode (Avalanche Photo Diode APD) arrays, and more specifically relates to a 2 m ×2 k APD array address coding active output circuit. Background technique [0002] At present, the address output technology of APD array mainly includes scanning type and non-scanning type. The scanning address output technology requires a more complex digital timing control circuit, especially for large-scale APD arrays, which is slow, consumes a lot of power, and costs high. The non-scanning address encoding circuit actively outputs the address of the corresponding unit through light detection, and each unit corresponds to a fixed encoding address. The address selection switch is controlled by simple combinational logic. The address output speed is fast and the power consumption is low. Scan output can only realize the output of single-point pixel address. Contents of the invention [0003] Aiming at the problems...
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IPC IPC(8): H03K19/21
CPCH03K19/21
Inventor 余国义黄伟陈壮邹雪城
Owner HUAZHONG UNIV OF SCI & TECH