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Photoelectric conversion output signal compensating method and device

A technology of output signal and photoelectric conversion, which is applied in the field of signal processing, can solve the problems of restricting the correct reception and sampling of output electrical signals, inaccurate digital signals, and limited bandwidth of output electrical signals, so as to improve the quality, accuracy of sampling and signal processing, Solve the effect of low precision

Inactive Publication Date: 2011-09-07
深圳市方隅光电科技有限公司
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Problems solved by technology

In practical situations, the bandwidth of the output electrical signal of common photoelectric conversion modules is very limited, which limits the correct reception and sampling of the output electrical signal at the receiving end
[0003] The existing sampling technology only simply samples the output electrical signal of the photoelectric conversion module. In this case, even if the sampling itself is accurate, it cannot change the fact that the signal itself is incomplete and accurate. The sampled digital signal also inaccurate

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  • Photoelectric conversion output signal compensating method and device

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Embodiment Construction

[0018] A further detailed description of a photoelectric conversion output signal compensation device of the present invention will be given below in conjunction with the accompanying drawings and embodiments:

[0019] A photoelectric conversion output signal compensator, including a high-pass filter, an A / D converter, a digital signal compensator and an adder. The high-pass filter receives the sinusoidal signal output from the photoelectric module, judges the basic frequency of the signal output by the photoelectric module, sets the cut-off frequency according to the basic frequency of the signal output by the photoelectric module, and filters the signal output by the photoelectric module to filter out low-frequency noise. and send it to the A / D converter. The high-pass filter can be implemented using existing technologies, and the low-frequency noise is a signal whose frequency is lower than the above-mentioned basic frequency in the received output signal of the photoelectr...

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Abstract

The invention specifically relates to a photoelectric conversion output signal compensating device, belonging to the technical field of signal processing and aiming at providing a device for improving the photoelectric conversion precision. The device is characterized by comprising a high-pass filter, an A / D (analog / digital) converter, a digital signal compensator and an adding device. In the device, the signal compensator and the adding device are utilized so as to carry self-adapting compensation on a signal, the problem of low photoelectric conversion signal precision caused by insufficient output bandwidth of the photoelectric conversion module is solved, and the quality of a photoelectric module output signal is improved. The compensated photoelectric module output signal has a better eye pattern so as to ensure the integrity of the received sine wave, so that the subsequent sampling and signal processing are more accurate and truer.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and in particular relates to a photoelectric conversion output signal compensation device. Background technique [0002] Photoelectric conversion is the process of converting optical parameters into electrical parameters. Due to the characteristics and limitations of photoelectric conversion devices, the output bandwidth of common photoelectric converters in the sensor field ranges from several hundred Hz to several hundred megahertz, and the output waveforms are mostly sine waves. From the Fourier series formula of the sine wave, it can be known that the sine wave has abundant high-order harmonic components. If you want to accurately restore the sine wave, you must restore the high-order harmonic part better, at least completely restore the The integrity of the signal can be guaranteed only when the third harmonic is above. In practical situations, the bandwidth of the output electri...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/26
Inventor 郭绪穆宝华阳海银王威王天海
Owner 深圳市方隅光电科技有限公司
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