[(诸如晶体加速度计麦克风等)]交流耦合传感器可能产生很大动态范围的信号,但预示其实际飞行状态下的电平是件困难的事。本文介绍了一种电话及高保真-高灵敏度系统用的压扩电路。将它用于遥测能增加信号的动态范围和精度,也能降低低电平信号下的噪声,又能减少超量程时的削波。该压扩器可用单端或双端方式,根据数据要求而定。虽然压扩器本身可能产生一些可预示的附加产物,但其中大部分可被消除。 Acoustically coupled transducers (such as crystal accelerometer microphones, etc.) may generate signals with a large dynamic range, but predicting the level of their actual flight conditions is a difficult task. This article describes a phone and high-fidelity - high-sensitivity system with the expansion circuit. Using it for telemetry increases the dynamic range and accuracy of the signal, as well as reducing noise under low-level signals and clipping while over-measuring. The compander can be single-ended or double-ended, depending on the data requirements. Although the compander itself may produce some predictable additional products, most of it can be eliminated.