Abstract: A method called voltage following and comparing is introduced, which eliminaies the effect of temperature on semiconductor pulse sensors.Compared with the method of voltage comparing directly which was used traditionally, it only follwos the tredency of original sine wave which is triggered by MR elements and has no relation with temperature;then shape it to square wave; thus eliminates the effect of temperature efficiently and elevates the encoder's working stability. In addition, the choices of circuitparameters and the application have been analysed.