04210151 is referenced by 40 patents and cites 5 patents.

A first oscillator dictates the pulse duration and frequency of stimulating signals; the oscillator output wave form is coupled to an output amplifier stage, and thence to the patient. A scanning oscillator provides a substantially linear ramp voltage, which in turn controls pulse duration, pulse frequency, and pulse intensity modulators. In turn, these modulators appropriately establish conditions within the first oscillator and the output stage whereby the output parameters are scanned through respective predetermined ranges, thereby periodically achieving optimum stimulating conditions.

Title
Electronic pain control with scanned output parameters
Application Number
5/945974
Publication Number
4210151
Application Date
September 26, 1978
Publication Date
July 1, 1980
Inventor
John W Keller Jr
Miami
FL, US
Agent
Audley A Ciamporcero Jr
Assignee
Stimtech
MN, US
IPC
A61N 1/36
View Original Source