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本文介绍了TeO_2晶体声光编转器专用驱动信号源的设计和制作.扼要地介绍了设计思想.并且对其中主要线路克拉泼振荡器和宽带线性高频大功率放大器进行了定性分析.并就信号源主要优点和存在问题进行了阐述.在设计上考虑到为能基本观察到稳定的光点矩阵,点扫描速度较高,所以采用了由阶梯波电压扫描控制的变容二极管压控振荡器系统.为了使40MC带宽范围内实现线性功率放大,采用了传输线变压器作间匹配的甲乙类高频大功率放大器.信点源设置了相应的数字电路,从而提供了二维128×128的等差频率输出.为便于实验观察需要又考虑了手控打码和显示打码状态装置.可以获得固定频率输出和慢速逐点扫描.扫描方式分点、行、帧三种.扫描速度分为3μs,5μs,7μs等八种.可随机选取128×128等十三种状态二维输出.利于在实验中观察器件性能.由于可调因素较多,元件特性的离散性(主要是变容二极管),造成频率间隔不够均匀,此外由于功率放大器选取变压器材料不合适造成低端波形不够好.这些问题都是在今后必须解决的.
This paper introduces the design and manufacture of the special driving signal source for the TeO 2 crystal acousto-optic compilator, introduces the design idea briefly, and qualitatively analyzes the main line Clapp oscillator and the broadband high-frequency linear high-power amplifier The main advantages of the signal source and existing problems are described in the design taking into account the basic observed stable spot matrix, point scanning speed is higher, so the use of a step-wave voltage sweep control varactor diode voltage-controlled oscillator System.In order to realize the linear power amplification in the range of 40MC, a transmission line transformer is used as a matched high-power class A and B high-power amplifier.The corresponding digital circuit is provided in the source of the signal source, thereby providing a two-dimensional differential of 128 × 128 Frequency output. In order to facilitate the experimental observation needs to consider the manual code and display code state device can get fixed frequency output and slow point-by-point scan, the scanning mode points, lines, frames 3. Scan speed is divided into 3μs , 5μs, 7μs and so on 8. Can choose randomly 128 × 128 thirteen kinds of state two-dimensional output, which is conducive to observe the performance of the device in the experiment due to more adjustable factors, components Of discrete (mainly varactor diode), resulting in a uniform frequency spacing is not enough, since the power amplifier in addition to improper material selected low-side transformer waveform is not good enough. These are issues that must be addressed in the future.