Implantable cardiac pacer with characteristic controllable circuit and control device therefor
Device for non-invasive programming of implanted body stimulators
Implantable digital cardiac pacer having externally selectible operating parameters and "one shot" digital pulse generator for use therein
Programmable body stimulator
Electronic tissue stimulator with output signal controls Patent #: 4237899
ApplicationNo. 06/373679 filed on 04/30/1982
US Classes:607/59, Control signal storage (e.g., programming)607/63Promoting patient safety or comfort
ExaminersPrimary: Cohen, Lee S.
Attorney, Agent or Firm
International ClassA61N 1/08 (20060101)
AbstractA circuit for causing the gradual turn-on of electrical tissue stimulation in a digitally controlled stimulator is disclosed. A stimulation pulse counter and a pulses per step memory circuit are connected to a decoder to provide an amplitude incrementing signal after a presettable count of stimulation pulses. An amplitude counter receives the incrementing signal to increment the amplitude of the stimulation output pulse through a digital to analog converter circuit and to reset the pulse counter. A maximum amplitude memory circuit and decoder operate in conjunction with the amplitude counter to latch the counter when a preset pulse amplitude is obtained. At the end of a stimulation interval, the amplitude counter is reset and stimulation pulses begin at the minimum amplitude at the start of the next stimulation interval.