| 摘要 |
PCT No. PCT/EP86/00042 Sec. 371 Date Oct. 2, 1986 Sec. 102(e) Date Oct. 2, 1986 PCT Filed Jan. 30, 1986 PCT Pub. No. WO86/04752 PCT Pub. Date Aug. 14, 1986.A circuit supplied with direct voltage serves for generation of voltages and/or currents of differing curve shape and differing frequency and/or differing polarity. A load L with ohmic, inductive, capacitive or complex resistance behavior is switched in series with a choke D. Furthermore, at least two controlled semiconductor switches T1 and T2 are provided, which are each, respectively in series, as far as the load L and the choke D are connected, but which, however, lie in current paths 1 and 2 which are connected at different potentials of the supply voltage. In operational use, the one switch T2 is held open while the other switch T1 is opened and closed in alternating sequence, and after termination of an adjustable and controllable time period, the switch T1, which has been hitherto operated in alternating sequence, is now kept open, while the switch T2, kept open hitherto, is now opened and closed in alternating sequence, and this alternating sequence of switch actuation is constantly repeated. These switches T1 and T2 can hereby be controlled by magnitudes inherent in the circuit or however also by magnitudes which act from the outside from the circuit (for instance computer control).
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