High temperature resistant multi-path measurement signal switching circuit based on time-sharing power supply technology

The invention discloses a high temperature resistant multi-path measurement signal switching circuit based on a time-sharing power supply technology, belonging to the field of sensing and measurement. The high temperature resistant multi-path measurement signal switching circuit based on the time-sharing power supply technology solves a problem that when environment temperature is high than 125 DEG C, multi-path switch chip resource of such temperature level is scarce and a manner of performing time-sharing switching for multi-path measurement signals by a multi-way switch is limited. The circuit provided by the invention comprises a 555 timer, a binary counter, three-input/eight-output selection decoder, triodes Q1-Q16, operational amplifiers A1-A8 and an output resistor; the 555 timer generates a group of frequency-adjustable square wave signals, only one of eight output variables is high level at any time, the rest seven variables are all low level, the eight paths of operational amplifiers also work circu