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US 8,552,698 B2Granted
High voltage shunt-regulator circuit with voltage-dependent resistor
AssigneeInternational Rectifier Corporation
InventorMelvin Kit Ho Chow
Life of this patent
Estimating the term…
Abstract
A voltage regulator circuit comprising a first circuit functioning as a voltage dependent resistor, the first circuit having an input coupled to a voltage source and an output and having a resistance dependent on the voltage applied across the circuit by the voltage source such that the resistance increases as the applied voltage increases; and a regulator coupled to the output of the first circuit for providing a regulated output voltage.
Claims19
A voltage regulator circuit comprising:
- a first circuit functioning as a voltage dependent resistor, the first circuit having an input coupled to a voltage source and an output and having a first circuit resistance dependent on an applied voltage applied across the first circuit by the voltage source such that the first circuit resistance increases as the applied voltage increases;
- and
- a regulator coupled to the output of the first circuit for providing a regulated output voltage;
- the first circuit comprising a MOS transistor and a series JFET, wherein the voltage source is connected to both the MOS transistor and the series JFET at a single node, and wherein the series JFET has its main terminals connected in series with main terminals of the MOS transistor.
1 more element
A voltage regulator circuit comprising:
- a first circuit functioning as a voltage dependent resistor, the first circuit having an input coupled to a voltage source and an output and having a first circuit resistance dependent on an applied voltage applied across the first circuit by the voltage source such that the first circuit resistance increases as the applied voltage increases;
- and
- a regulator coupled to the output of the first circuit for providing a regulated output voltage;
- the first circuit comprising a MOS transistor and a series JFET functioning as the voltage dependent resistor, wherein the series JFET is an internal JFET of the MOS transistor.
1 more element
A voltage regulator circuit comprising:
- a first circuit functioning as a voltage dependent resistor, the first circuit having an input coupled to a voltage source and an output and having a first circuit resistance dependent on an applied voltage applied across the first circuit by the voltage source such that the first circuit resistance increases as the applied voltage increases;
- and
- a regulator coupled to the output of the first circuit for providing a regulated output voltage;
- the first circuit comprising a MOS transistor and a series JFET functioning as the voltage dependent resistor, wherein said MOS transistor has a gate coupled to a biasing circuit for biasing the MOS transistor in a triode region of operation.
1 more element
Dependencies are inferred from the claim text.