An adjustable simulating TDI CCD output signal generator

Abstract

The invention discloses an adjustable simulating TDI CCD output signal generator and belongs to electronic application technical field. The adjustable simulating TDI CCD output signal generator is used for generating a simulating signal of an adjustable TDI CCD output signal and comprises a waveform generating circuit, a signal amplitude-adjusting circuit, a signal superposition circuit, a signal Low-pass filtering circuit, and a power supply circuit. The waveform generating circuit generates a logic signal pulse which may adjust the amplitude of a signal with the signal amplitude-adjusting circuit. Then, the simulating signal of the TDI CCD output signal can be preliminary obtained via the signal superposition circuit. Finally, the simulating signal of the TDI CCD output signal with adjustable amplitude is obtained through the signal Low-pass filtering circuit. The voltage of the waveform generating circuit, the signal amplitude-adjusting circuit, the signal superposition circuit, and the signal Low-pass filtering circuit are all supplied by the power supply circuit. The adjustable simulating TDI CCD output signal generator adjusts the reset level and the signal level of the simulating signal so as to simulate simulating signals of TDI CCD output signals in different X-ray dosage irradiation. Therefore, the simulating signal substitutes for the TDI CCD output signal and is used in development of TDI CCD signal processing circuits.

Description

technical field [0001] The invention belongs to the field of signal analog output, and relates to a signal generator, in particular to an adjustable analog TDI CCD (Time Delay Integration Charge Coupled Devices, Time Delay Integration Charge Coupled Devices) output signal generator. Background technique [0002] TDI CCD is a new type of linear array photoelectric sensor, which exposes the same target multiple times through the method of time delay integration to increase the photon energy collection of the target. Compared with CMOS (Complementary Metal Oxide Semiconductor, Complementary Metal Oxide Semiconductor) image sensors, TDI CCD can obtain high sensitivity without sacrificing spatial resolution and working speed, and obtain high-quality images through time-delay integration in low illumination The advantages of image information, and TDI CCD has the advantages of good color saturation, sharper images and more realistic texture, especially in low-light environments, h...

AI Technical Summary

Problems solved by technology

The current method is to directly use the hardware circuit to simulate the function of the CCD device and obtain the corresponding output signal, but the existing hardware circuit debugging is complicated, the development cycle is long, the output signal cycle is not adjustable, the signal cannot be changed, and the signal when the CCD has an object cannot be simulated. Variations, unsatisfactory waveforms and other defects

Images