Linear CCD (charge coupled device) signal amplification circuit structure and amplification implementation method thereof

Abstract

The invention provides a linear CCD signal amplification circuit structure. The linear CCD signal amplification circuit structure comprise a direct current reference level input circuit, a CCD signal amplification circuit, a filter circuit and an AD (analog / digital) collector which are sequentially connected, wherein the CCD signal amplification circuit is composed of a resistor R3, a resistor R4, a capacitor C2 and operational amplifiers U1A; the direct current reference level input circuit is connected with the resistor R3, the capacitor C2 is connected in parallel with the resistor R4 and then connected in series with the resistor R3; the filter circuit is connected with the first pin of the operational amplifiers U1A; both ends of the capacitor C2 are connected with the first pin and the second pin of the operational amplifiers U1A respectively; linear CCD output signals CCD_OS are connected with the third pin the operational amplifier U1As. The invention also provides a linear CCD signal amplification implementation method. According to the linear CCD signal amplification circuit structure, through treatment on direct current signals and small signals of CCD output signals by two operational amplifiers, post AD data collection can be facilitated, and circuit simplification, performance reliability and low cost can be achieved.

Description

technical field [0001] The invention relates to the technical field of electronic products, in particular to a linear CCD signal amplifying circuit structure and an amplifying realization method thereof. Background technique [0002] CCD is a semiconductor device that converts optical images into digital signals. Its working principle is: the photosensitive element can generate charge when it is exposed to external light, and the charge is stored in the MOS (metal-oxide-semiconductor) unit, and the amount of charge generated is proportional to the intensity of light and the irradiation time. Driven by a sequential external circuit, the charges stored in the CCD can be shifted out sequentially. In the process of CCD application, in addition to the complex driving signal generation circuit, the post-processing of the output analog signal is also very important, which directly affects the image quality. Therefore, the design of the post-stage circuit becomes the key to analog-...

AI Technical Summary

Problems solved by technology

[0004] One of the technical problems to be solved by the present invention is to provide a linear CCD signal amplification circuit structure, which has the characteristics of simple circuit, reliable performance and low cost, and can effectively solve the problem of The structure is too complex and the design cost is high

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