RF therapy apparatus

Details RF therapy apparatus RF therapy apparatus

1984-03-02

1987-06-09

Kamm, William E.

Surgery

Truss

Pad

A61N 100

Patent

active

046712860

ABSTRACT:
The apparatus is comprised of an analog portion which generates and shapes a high frequency signal transmitted by a treatment head and a logic portion which generates time segment cuts and regulates the amplitude of the high frequency signal.
The analog part is comprised of, in cascade, a quartz crystal stabilized high frequency oscillator (1), a modulation stage (2), a preamplification stage (3), a power amplification stage (4) and a bandpass filter (5) whose output is connected to the excitation input of the head (6). The logic part (7) generates a train of pulses which are applied to the modulating input of modulator (2) and is comprised of a digital pulse width regulator circuit (10), a pulse repetition rate regulator circuit (9), a pulse amplitude regulator circuit (11) and a continuous or rhythmic operating period regulator circuit.

REFERENCES:
patent: 3513851 (1970-05-01), Smith et al.
patent: 3670737 (1972-01-01), Peard
patent: 3800802 (1974-04-01), Berry et al.
patent: 3952751 (1976-04-01), Yarger
patent: 4210152 (1980-07-01), Berry
patent: 4318411 (1982-03-01), Elmovist
Happell et al, "Engineering Electronics", McGraw-Hill Book Co. Inc., New York, 1953, pp. 117-118 & 139.

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