Transcutaneous electric nerve stimulation system

Details Transcutaneous electric nerve stimulation system Transcutaneous electric nerve stimulation system

1990-12-13

1994-03-08

Kamm, William E.

Surgery

Truss

Pad

A61N 140

Patent

active

052918831

ABSTRACT:
An apparatus for transcutaneous electric nerve stimulation (TNS) with a power supply, a frequency generator and an electric circuit for the generation of different output frequencies of variable intensity at the output electrodes which may be connected to the apparatus and to an output short circuit to improve the pulse form emitted. The output short circuit network comprises a transistor T1, which upon actuation by a triggering pulse activates with its collector the base of a subsequent transistor T2, in a manner such that the trigger pulse is inverted in the transistor T1, whereby the transistor T2 switches to the negative pulse flank and the outlet is short-circuited by the discharge resistor R(ent) connected to the emitter side.

REFERENCES:
patent: 3563247 (1971-02-01), Bowers
patent: 4558703 (1985-12-01), Mark
patent: 4674482 (1987-06-01), Waltonen et al.
Donaldson et al., "When are actively balanced biphasic (`Lilly`) stimulating pulses necessary in a neurological prosthesis?", Medical & Biological Engineering & Computing, Jan. 1986, pp. 41-49.

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