POSITION DETECTING DEVICE

摘要

A position detecting sensor (13) converts position variations into a pulse train (a) that includes forward and reverse rotation pulses. The pulse train is applied through an input/output isolation circuit (3A) to a direction discriminating circuit (4), where it is separated into distance measuring pulse signal (b) and a direction discriminating signal (c). The former signal (b) is applied to a programmable frequency divider (5). The output of the latter (5) is applied, as an interruption pulse signal (d), to a microprocesor (6). The frequency division ratio is determined by a ratio selecting signal (e) provided by a programmable input/output circuit (9), e.g. under control of the microprocessor. A data input/output device (2) is coupled through a two-way bus coupler (II) to an address bus (g), a data bus (h), and a control bus (i).