Institute of Chongqing Optical-Electronic Technology,Chongqing,40060,China
In order to meet the analysis and parameter evaluation of multi-spectral TDICCD, a multi-spectral TDICCD measurement circuit was designed. The circuit consists of three parts: digital voltage generator, driver and signal processing. The FPGA generates the logic timing for TDICCD operation. Then the logic timing is used to generate the pulse signals to drive the CCD through the drive circuit. The CCD converts the photos into analog signals. Analog signals are converted to digital numbers by the LM98640. The FPGA arranges the digital numbers into image data and sends it to the PC through Camera Link. The PC host computer software is in accordance with the national military standard "Charge-coupled imaging device test method". Processing and calculating the image data, and obtaining various parameter indexes of the CCD. The test results show that the measurement board can make a convenient voltage-adjustment, and the noise of the measurement board is 0.24mV, the signal-to-noise ratio is 56dB, and the deviation of repeated measurement is about 1.44%, which satisfies the requirements of TDICCD parameter measurement evaluation. The measurement board has been applied to the development of a satellite-board TDICCD.