System for realizing signal driving of EMCCD (Electron Multiplication Charge Couple Device) by high-voltage operational amplifier

A high-voltage, signal technology, applied in the field of high-speed high-voltage drive signal realization system, can solve the problems such as difficult to realize the drive method, achieve the effect of high circuit stability, reduce the power consumption of the operational amplifier, and realize the effect of closed-loop control
CN102447849AInactive Publication Date: 2012-05-09CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
4 Cites 18 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
Publication Date
2012-05-09
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a system for realizing signal driving of an EMCCD (Electron Multiplication Charge Couple Device) by a high-voltage operational amplifier, relating to a driving technology of a CCD (Charge Couple Device), and solving the problems which are difficult to realize by the existing driving method. In the invention, a high-speed and high-voltage driving signal is obtained by a gain-adjustable high-speed and high-voltage operational amplifying circuit and can be applied when the working frequency is high and the multiplier voltage is high; by directly adopting digital signal control, the circuit stability is high; by adopting a DC (Direct Current)-DC power supply for supplying power, the voltage of the power supply changes according to the amplitude change of an output signal, and the power consumption of the operational amplifier can be lowered when the amplitude of the output signal is lower; and a low-pass filter converts an amplitude-adjustable square wave generated by a digital-to-analog converter into a sine wave, and the sine wave is amplified by the high-speed and high-voltage operational amplifier so as to generate a high-speed and high-voltage driving signal. The amplitude of the output signal is changed through two paths of digital control signals so as to realize the digital control on the output signal, thereby ensuring that final high and low level values are in the allowable working range of the device.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a driving technology of a CCD, in particular to a system for realizing a high-speed and high-voltage driving signal of an EMCCD. Background technique

[0002] When imaging a darker target, if the noise of the CCD's readout amplifier is relatively large, it will often cover up the useful signal, especially when the readout speed is high, and the readout noise will increase with the increase of the readout speed . With the continuous development of CCD manufacturing technology, the advent of EMCCD enables tiny signals to overcome the noise of the readout amplifier, and this type of CCD can obtain image quality similar to that of ICCD without any additional structure; EMCCD's The basic structure is roughly the same as the traditional frame transfer CCD, but hundreds of gain registers are added between the readout register and the sense amplifier. Its electrode structure is different from the transfer register, and the signal is g...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More