Electromedical apparatus for interference current treatment

Details Electromedical apparatus for interference current treatment Electromedical apparatus for interference current treatment

1980-08-04

1983-02-22

Cohen, Lee S.

Surgery

Truss

Pad

A61N 136

Patent

active

043745245

ABSTRACT:
In an exemplary embodiment, the simultaneous intensity control of the individual current circuits is to be effected while avoiding undesired intensity deviations in the current circuits such as occur because of nonuniformity of multiple potentiometers, for example. Expediently, the signal frequencies are digitally generated. According to the disclosure, in every output current circuit a transistor is connected-in, which is switched between a conducting and a nonconducting condition so that the collector output exhibits either a zero value or an operating voltage value, all switching transistors being activated on the collector side via a common control element from a single voltage source. In the through-connected state, the collector voltages of the switching transistors have the same value, respectively, which can be synchronously varied in dependence upon the setting of common control element.

REFERENCES:
patent: 3895639 (1975-07-01), Rodler
patent: 3958577 (1976-05-01), Rodler
patent: 4153061 (1979-05-01), Nemec
patent: 4280504 (1981-07-01), Rodler

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