Gain filter circuit applicable to scientific-grade CCDs
A filter circuit, scientific-level technology, applied in gain control, television, electrical components, etc., to achieve the effect of solving complex control and continuously adjustable gain
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[0012] The gain filter circuit applied to a scientific grade CCD of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0013] Applying the present invention to an astronomical observation camera using a scientific-grade CCD is based on the imaging principle of a scientific-grade CCD: the CCD is composed of pixels arranged in rows and columns, the image signals are stored in the pixels, and the output of the signal is driven sequentially by the drive signal in rows and columns. The CCD output terminal outputs in turn by pixel. At present, scientific-grade CCDs all adopt the output structure of floating diffusion amplifier, and the output structure of CCD determines the form of the signal. figure 1 is a scientific grade CCD output signal legend, such as figure 1 As shown, the output signal of each pixel of the CCD can be divided into three parts t1, t2, and t3 in time order. Among them, the t1 part i...
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