Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific voltage responsive fault sensor
Patent
1986-10-22
1988-04-19
Pellinen, A. D.
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific voltage responsive fault sensor
361 91, 361 58, 357 48, 357 2313, H02H 314
Patent
active
047394374
ABSTRACT:
A protected output switch for an implantable medical device, such as a pacemaker, is disclosed. Through this output switch, a stimulation pulse is delivered from an internal storage element to an output terminal. The output switch includes a first N-channel MOSFET switch having its source terminal connected to the internal storage element and its drain terminal connected to the output terminal. The gate terminal of the N-channel MOSFET switches is connected to approriate logic switching signals. Included as part of the output switch is a second N-channel MOSFET switch having its source terminal connected to the P-well terminal of the first N-channel MOSFET switch, its drain terminal connected to the internal storage element, and its gate terminal connected to the output terminal. This second switch serves to block any potentials, whether internal or external, from being applied to the base of a parasitic NPN bipolar transistor that exists within the output switch. Should such NPN bipolar transistor be turned on, large potentially destructive currents could flow through the output switch.
REFERENCES:
patent: 4496849 (1985-01-01), Kotowski
COS/MOS Quad Bilateral Switch, CD4066A types, "RCA COS/MOS Intergrated Circuits," p. 519 (1977 RCA Corporation).
Deboer Todd E.
Gold Bryant R.
Pellinen A. D.
Siemens-Pacesetter, Inc.
LandOfFree
Pacemaker output switch protection does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pacemaker output switch protection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pacemaker output switch protection will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2180277