| 摘要 |
A signal amplification/shaping unit with feedback for magnetotherapy apparatus comprises a microcontroller (MC), a key driver, field effect transistors VT1, VT2,VT3, VT4, stabilitrons VD1, VD2, a resistor R1, an inductor L and a shunt resistor R2. The field-effect transistors connected according a half-bridge circuit with piecewise progressive pumping are used, a feedback is used also. |
