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Electronic multiplying driving power supply of electron multiplying charge coupled device (EMCCD)

A technology of driving power supply and electron multiplication, applied in electrical components, adjusting electrical variables, and output power conversion devices, etc., can solve the problems of low efficiency of analog linear power supply and large power supply ripple, and achieve low ripple and reduce power consumption. , high efficiency

Active Publication Date: 2015-02-18
GEOPTICS SEQUENCING EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a high-speed high-voltage drive signal power supply for EMCCD to solve the problems of large ripples in the existing DC-DC power supply, the working clock is not synchronized with the readout clock of the EMCCD, there is no power-on initial state control, and the efficiency of the analog linear power supply is low. power supply

Method used

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  • Electronic multiplying driving power supply of electron multiplying charge coupled device (EMCCD)
  • Electronic multiplying driving power supply of electron multiplying charge coupled device (EMCCD)
  • Electronic multiplying driving power supply of electron multiplying charge coupled device (EMCCD)

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specific Embodiment approach 1

[0020] Specific implementation mode 1. Combination figure 1 and figure 2 Describe this embodiment, an electron multiplication drive power supply for EMCCD, including an adjustable DC-DC power supply part, an adjustable analog linear power supply part, a controller and an external input power supply;

[0021] The adjustable DC-DC power supply part includes the first low-voltage DAC circuit, negative detection circuit, logic circuit, low-voltage power supply circuit, small transformer and related circuits, sampling feedback circuit, DC-DC chip and peripheral circuits, and a dual-secondary coil A transformer, a first rectification filter circuit and a second rectification filter circuit;

[0022] The adjustable analog linear power supply part includes a second low voltage DAC circuit, a third low voltage DAC circuit, a first analog voltage regulating circuit with optocoupler and a second analog voltage regulating circuit with optocoupler;

[0023] The external input power supp...

specific Embodiment approach 2

[0027] Specific embodiment two, combine Figure 1 to Figure 5 Describe this embodiment, this embodiment is the embodiment of the electron multiplication drive power supply of a kind of EMCCD described in specific embodiment one:

[0028] For the traditional DC-DC power supply, the efficiency is high, but the output ripple is large, and the output voltage is fixed; for the traditional analog adjustable power supply, the output voltage changes due to the fixed input voltage, and the power supply efficiency is low when the output voltage is low; combined figure 1 , the present invention combines the adjustable DC-DC power supply with the adjustable analog linear power supply, and can greatly reduce the output ripple through two-stage ripple suppression; through two-stage voltage adjustment, it can ensure the input and output of the adjustable analog linear power supply The output voltage drop is maintained at a lower constant dropout voltage to achieve high power efficiency; V in...

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Abstract

An electronic multiplying driving power supply of an electron multiplying charge coupled device (EMCCD) relates to the technology of a power supply of a CCD and resolves the problem that the existing direct current (DC)-DC power supply is large in ripple wave, a working clock is not synchronous with a reading clock of the EMCCD, power-on initial state control does not exist and analog linear power supply efficiency is low. The power supply adopts two-stage voltage adjustment of DC-DC conversion and analog conversion, achieves high efficiency by enabling DC-DC output and analog output to keep constant, utilizes a ripple wave restraining function in a low voltage difference power supply chip to achieve low ripple wave output, adopts combination of a digital to analog converter (DAC) and a linear optical coupler to achieve digital voltage adjustment, is capable of achieving isolation of a control portion and a power supply portion, adopts a small transformer to achieve synchronization of DC-DC power supply working frequency and reading clock frequency, reduces interference of a switch power supply in output images, outputs high voltage required by multiplying in the pixel reading stage and outputs low voltage satisfying load transfer in the non-reading stage to further reduce power consumption.

Description

technical field [0001] The invention relates to a CCD power supply technology, in particular to a power supply for EMCCD high-speed and high-voltage drive signals. 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 gained here. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/00H02M3/22H02M1/14H02M1/36
Inventor 余达刘金国郭永飞周怀得李广泽翟岩梅贵
Owner GEOPTICS SEQUENCING EQUIP CO LTD
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