中文摘要：

针对固体发动机羽烟透过率面阵测量系统的测试要求, 设计开发了两种不同的峰值保持电路。其中激光和红外光通道采用峰值保持芯片PKD01代替由比较器和取样保持器组成的峰值保持电路, 降低了由于比较器转换状态延迟和保持电压下降所导致的误差。对于可见光通道, 由于经光电转换后的电压信号为窄脉冲小信号, 为了降低峰值保持电路中二极管对小信号的非线性误差, 先对信号进行了前置放大；为了保证低电压下降率, 采用了前置峰值保持电路与PKD01相结合；为了保证高压摆率, 选用肖特基二极管和聚酯薄膜电容组成前置峰值保持电路。测量结果表明, 经过改进的峰值保持电路可以稳定、快速、准确地保持面阵烟雾透过率测量系统中各路的电压信号。

英文摘要：

Two kinds of peak detect and hold circuits for measurement system for plane array solid engine smoke transmittance are proposed. A monolithic peak detector named PKD01 is used instead of the peak detect and hold circuit consisted of comparator and sample and hold circuit for channels of laser and infrared to decrease the error generated by the delay time of comparator and the droop of voltage. For the channel of visible light, the nonlinearity of diode for small signal can be ignored owing to the preposed amplifying circuit. A combination of PKD01 and the preposed peak hold circuit makes it possible to guarantee low droop rate. Schottky diode and polyester film capacity are used in preposed peak hold circuit to gain the slew rate of peak detect and hold circuit. The test result shows that the improved peak detect and hold circuit can hold the peak voltage of measurement system for plane array smoke transmittance steadily ,quickly and accurately.