| 摘要 |
<p>PCT No. PCT/DE97/01157 Sec. 371 Date Dec. 14, 1998 Sec. 102(e) Date Dec. 14, 1998 PCT Filed Jun. 9, 1997 PCT Pub. No. WO97/48160 PCT Pub. Date Dec. 18, 1997A circuit arrangement for producing an output voltage with a first polarity with respect to a reference-earth potential from an operating voltage with a second polarity with respect to the reference potential. The circuit arrangement operates on the basic principle that a first capacitor is charged, by means of a voltage rise on a coil after current has been removed from it, to a voltage which is positive with respect to the fixed reference-earth potential. During the on-phase of a transistor, the first capacitor charges a second capacitor to a voltage which is negative with respect to the fixed reference-earth potential and can be picked off from the outside. An electrical resistor is connected between the circuit output connection and the control line of the transistor.</p> |
