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Acousto-optic driver base on direct digital synthesis technology

A digital synthesis and driver technology, applied in the direction of automatic power control, electrical components, pulse shaping, etc., can solve the problems of inaccurate and inconvenient output frequency of acousto-optic drivers, and achieve a concise and clear human-computer interface, convenient development, Control flexible and convenient effects

Inactive Publication Date: 2011-03-16
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The output frequency of this type of acousto-optic driver is not accurate and stable enough, and its frequency drift often reaches several megahertz, and it is very inconvenient to provide an additional accurate and stable analog control voltage when using it.

Method used

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  • Acousto-optic driver base on direct digital synthesis technology
  • Acousto-optic driver base on direct digital synthesis technology
  • Acousto-optic driver base on direct digital synthesis technology

Examples

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Embodiment 1

[0017] See attached figure 1 , the frequency synthesizer 1 directly digitally synthesizes the waveform of the required frequency and amplitude through direct digital synthesis technology. Adopt special direct digital synthesis chip AD9951. The chip is a product of ADI Company, 48-pin TQFP chip package, internal clock frequency up to 400MHz, integrated 14-bit digital-to-analog converter, 32-bit frequency word, 25M serial interface, 1.8V power supply. Its 2-wire serial interface is connected to the logic controller 2; analog 1.8V power supply, digital 1.8V power supply, input and output 3.3V power supply, and the 3-way power supply is respectively connected to the power management module 5; the clock input pin is connected to the reference clock 3 , the 400MHz internal clock is obtained through the internal phase-locked loop; the reset pin is connected to an RC oscillator circuit for power-on reset; the required waveform is output by the output pin, and transmitted to the radio...

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Abstract

The present invention relates to an acousto-optic driver based on the technology of Direct Digital Synthesis (DDS), and consists of a frequency synthesizer (1), a logic controller (2), a reference clock (3), a radio frequency control and amplification device (4), and a power management module (5). The logic controller is connected with the frequency synthesizer; under the control of the logic controller, the frequency synthesizer can transmit waveforms of frequency and amplitude, and provide the display state of liquid crystal display; the reference clock is connected with the frequency synthesizer, and is used for providing signals of the reference clock for the frequency synthesizer; the radio frequency control and amplification device is connected with the frequency synthesizer, and isused for amplifying and transmitting the high-frequency signals generated by the frequency synthesizer; the power management module is connected with the power supply with each device. The acousto-optic driver has the advantages of wide driving frequency band, high frequency accuracy, high resolution, and excellent frequency stability, and is suitable for various acousto-optic devices and ultrasonic devices of high-frequency and radio-frequency bands.

Description

technical field [0001] The invention relates to an acousto-optic driver, especially an acousto-optic driver based on direct digital synthesis technology (DDS). Background technique [0002] In many fields of industry and scientific research, acousto-optic devices have many applications, such as: fast spectral analysis, acousto-optic Q-switched lasers, acousto-optic frequency shifting, acousto-optic chopping, acousto-optic active mode-locked lasers, etc. The original acousto-optic driver is mainly composed of a voltage-controlled oscillator frequency synthesizer and a radio frequency control and amplifier. Traditionally, a voltage-controlled oscillator (VCO) is used as a tunable frequency synthesizer. The output frequency is controlled by applying different voltages, and the output RF signal is amplified by the RF control and amplifier. The output frequency of this type of acousto-optic driver is not accurate and stable enough, and its frequency drift often reaches several m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K5/01H03L7/00
Inventor 张璋林强
Owner ZHEJIANG UNIV
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