SU1700765A2 - Photosignal sensor - Google Patents

Abstract

The invention relates to optoelectronics and can be used in multi-element devices for recording, storing and processing photosignals. The purpose of the invention is to increase the signal to noise ratio. The device contains a photodiode 1, a bias current generator 2, a CCD register element 3, a reset key 4, a driver, a torus 5, a coupling capacitor 6, keys 7.8, a gated subtraction unit 9 consisting of a current generator 10, VDP transistors 11 , 12 and differential amplifier 13, switch 26, low-pass filter 27. The operating mode of the photodiode 1 is set by the constant voltage applied to the bias input of the photodiode 1 and the bias current. In the initial state, a reset pulse arrives at the gates of keys 4.7.8, which opens these keys. The signal amplified by the Varactor 5 is fed to the input of the differential amplifier 13, and its output through the public key 26 to the filter 27. 5 Il. and S (L

Description

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Claims (1)

Claim Photo Signal Reader 45 la by Aut. St. No. 1469569, characterized in that, in order to increase the signal-to-noise ratio, a third controlled key and a low-pass filter are introduced in series, the output of which is connected to the first electrode of the CCD register, the signal input of the third controlled key is connected to the output of the differential amplifier, and the control the input of the third controlled key is the input of the strobe pulse. 17po5