Voltage regulator
AssigneeCardiac Pacemakers, Inc.
InventorsSuneel Arora, David W. Kelly
Life of this patent
Estimating the term…
Abstract
A voltage regulator in a battery powered device, such as an implantable cardiac defibrillator, provides regulated output voltage for other circuits. When large currents are drawn from the battery, such as during charging of defibrillation output capacitors, switches decouple the regulator from receiving power from the battery and couple the regulator to receive power from a stable boost output voltage generated by a boost converter. The regulator provides a stable regulated output voltage less noisy than the boost output voltage. Controlled switch conductances in the regulator provide operation over a wide range of output load currents.
Claims15
A regulator for generating a regulated output voltage, the regulator comprising:
- an amplifier circuit having a power terminal and an amplifier output terminal;
- a switch coupled to the power terminal for receiving a power supply and coupling the power supply to the power terminal, the switch having a control terminal;
- and
- a control circuit, coupled to the control terminal of the switch, for controlling the conductance of the switch for improving a frequency response of the amplifier circuit.
A method of generating a regulated output voltage, the method comprising:
- receiving a first power supply;
- generating a boosted second power supply from the first power supply;
- and
- switching between:
- (a) bypassing the boosted second power supply and regulating the output voltage from the first power supply;
- and
- (b) regulating the output voltage from the boosted second power supply.
Dependencies are inferred from the claim text.