Transient suppression with lossless steady state operation
AssigneeQuantance, Inc.
InventorsVikas Vinayak, Serge Francois Drogi
Life of this patent
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Abstract
A power supply efficiently suppresses transient voltages by storing the maximum charge expected in the transient and releasing it during the transient event at a rate in an equal but opposite amount to the transient, preventing the battery voltage from collapsing. The described power supply provides improved efficiency compared to conventional architectures for transient suppression, thus increasing the length of time between battery charges and creating a better user experience.
Claims20
A transient suppression circuit, comprising:
- a power supply terminal configured to couple to a voltage source and to an electronic device to provide power to the electronic device;
- an operational amplifier having an output coupled to the power supply terminal to provide an output current during a transient load condition;
- and
- a bias capacitor, coupled to a bias input of the operational amplifier, to discharge and provide a bias current to the operational amplifier during the transient load condition.
A transient suppression circuit, comprising:
- a power supply terminal configured to couple to a voltage source and to an electronic device to provide power to the electronic device;
- an operational amplifier having an output coupled to the power supply terminal to provide an output current during a transient load condition;
- a bias capacitor, coupled to a bias input of the operational amplifier, to discharge and provide a bias current to the operational amplifier during the transient load condition;
- and
- a current limiting element, coupled between the power supply terminal and the bias input of the operational amplifier, to limit an amount of current flowing from the power supply terminal to at least one of the bias input of the operational amplifier and the bias capacitor during the transient load condition.
A transient suppression circuit for providing power to an electronic device, comprising:
- a power supply terminal configured to couple to a voltage source and to the electronic device to provide power to the electronic device;
- an operational amplifier to receive a differential input voltage and produce an output current responsive to the differential input voltage being positive;
- an operational amplifier input circuit to provide the differential input voltage to the operational amplifier, the differential input voltage being positive during a transient load condition, and the differential input voltage being negative during a nominal load condition;
- and
- a bias capacitor coupled to a bias input of the operational amplifier to supply a bias current to the bias input of the operational amplifier during the transient load condition to enable the operational amplifier to supply the output current.
Dependencies are inferred from the claim text.