鉴相式数显表前置放大器的设计

The Design of Preamplifier in Phase-discriminating Type Digtal Display Set

论述了鉴相式数显表前置放大器的设计方法．定尺信号的处理顺序为：宽带放大，限幅处理，两节串联二阶带通滤波器滤波，滞后比较器整形．这种设计方法可在满足细分精度的条件下，提高温度稳定性和抗干扰能力．

This paper describes the design way about the preamplifier of phase-discrindnating digitaldisplay set.it is that the signal of stator of inductosyns is amplified through a breadbend amplifier, limited on amplitade before through a bandpass filter with a structure double second order and the changed into pulse by sehmitt trigger.In this way, the stability is temperature andability to restrain disturbance can be hened on the condition of meeting accuracy.