A high-voltage sine wave drive signal generator

Abstract

The invention provides a generating device of a high-voltage sine wave drive signal. The generating device comprise a computer, a single-chip microcomputer, a field-programmable logic gate array, a digital frequency synthesizer, a transformer, a first low-pass filter, a bias voltage generator, a signal amplifying module, a bias power supply, a high-voltage power supply, a high-voltage amplifying module, a clamping circuit and a second low-pass filter. The amplitude-controllable sine wave signal output by the digital frequency synthesizer is amplified in the mode that the signal amplifying module and the high-voltage amplifying module are in two-stage cascade, and then the high-voltage sine wave signal is obtained through clamping by the bottom clamping circuit. In addition, the noise of the sine wave signal is eliminated through the first low-pass filter after being directly output by the digital frequency synthesizer and through the second low-pass filter after signal clamping. By the adoption of the generating device of the high-voltage sine wave drive signal, the generation method of the sine wave is simplified, the frame frequency of an electron multiplying charge coupled device CCD60 reaches over 1000 Hz, the frequency is increased by one time compared with the frequency of foreign cameras of the same type, and the generating device of the high-voltage sine wave drive signal is used for generating electron gain through high-frequency high-voltage gain drive of the charge coupled device.

Description

technical field [0001] The invention belongs to the field of low-light imaging, and relates to a high-voltage sine wave drive signal generating device, which is mainly used for driving a unique electronic gain register of an EMCCD to generate electronic gain. Background technique [0002] Electron Multiplying Charge Coupled Device (EMCCD) integrates hundreds of electron multiplication registers on the silicon chip, which can amplify signal electrons by more than 1000 times in the electronic domain and obtain very high sensitivity, especially suitable for Imaging under low light conditions. However, the charge-coupled device requires a unique sine wave or square wave driving signal with a low voltage of 4.0V and a high voltage of 20V-50V to generate electronic gain. This requirement is very difficult in the actual implementation of the circuit. In addition, the readout amplifiers of some electron multiplication CCDs can reach a pixel clock frequency above 18MHz after special...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the existing charge-coupled device high-voltage gain sine wave drive device cannot reach the driving frequency of 20MHz and the charge-coupled device 60 cannot reach the highest frame frequency of 1000Hz, a charge-coupled device with a signal frequency of 20MHz and a signal amplitude of 45V was invented. Coupling device sine wave driver

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