This circuit can greatly enhance stability and accuracy of gas sensors which have start resistance drift but basically constant sensitivity.
该电路适用于起始阻值漂移，而灵敏度基本不变的气敏元件，可大大提高此类元件的稳定性与准确性。
A three phase half controlled bridge circuit with constant current and high efficiency is designed in the charged loop of the welding power supply. So a limiting current resistance is canceled.
在焊接电源的充电回路中设计了三相桥式半控、恒流高效充电回路，取消了限流电阻；
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