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US 4,402,322 AGranted
Pacer output circuit
AssigneeMedtronic, Inc.
InventorStephen R. Duggan
Life of this patent
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Abstract
Pacer output circuitry for providing biphasic stimulation pulses to heart tissue at a voltage twice the supply voltage. Additionally, the circuit may be configured to sense the intracardiac electrogram in a unipolar or bipolar configuration.
Claims4
An improved pacer output/input circuit of the type having first
- and second output electrode connections for coupling to the heart, for producing a biphasic stimulation output pulse from single ended power supply and having an output voltage twice that of said power supply in response to pace input signals including:
- a first current limiting buffer for selectively sourcing or sinking current from a first output electrode connection in response to a first control signal;
- a second current limiting buffer for selectively sourcing or sinking current from said second output electrode in response to a second control signal;
- and
- wherein the improvement comprises:
- means for producing a time sequence of the complementary first and second control signals in response to a sequence of pace input pulses.
3 more elements
Dependencies are inferred from the claim text.