US 11,886,216 B2 · Voltage regulator circuit and method for regulating a voltage

Abstract

A voltage regulator is provided. The voltage regulator includes a shunt transistor and a feedback circuit. The shunt transistor has a first current electrode coupled to a first voltage source terminal, a second current electrode coupled to a second voltage source terminal, a control electrode coupled to receive a reference voltage, and a body electrode. The feedback circuit has an input terminal coupled to the body electrode of the shunt transistor, and an output terminal coupled to the control electrode of the shunt transistor. The voltage regulator is suitable for use in a passive RFID device to protect the device from over-voltage damage. In another embodiment, a method for regulating a voltage is provided.

Claims20

Dependent claims

A voltage regulator circuit comprising:

a shunt transistor having a first current electrode coupled to a first voltage source terminal, a second current electrode coupled to a second voltage source terminal, a control electrode coupled to receive a reference voltage, and a body electrode;
and
a feedback circuit having an input coupled to the body electrode of the shunt transistor, and an output terminal coupled to the control electrode of the shunt transistor.

A voltage regulator circuit comprising:

a voltage reference circuit coupled between a first voltage source terminal and second voltage source terminal, and an output terminal for providing a reference voltage;
a shunt transistor having a first current electrode coupled to the first voltage source terminal, a second current electrode coupled to a second voltage source terminal, a control electrode coupled to receive the reference voltage, and a body electrode;
and
a feedback circuit having an input terminal coupled to the body electrode of the shunt transistor, and an output terminal coupled to the control electrode of the shunt transistor.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

17/453,218Filed 2 Nov 2021

Published

US 2023/0135571 A14 May 2023

Granted

30 Jan 2024

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

G05F 1/575
Using semiconductor devices in series with the load as final control devices: characterised by the feedback circuit
G05F 3/242
Wherein the transistors are of the field-effect type only: with compensation for device parameters, e.g. channel width modulation, threshold…
G05F 1/468
Wherein the variable actually regulated by the final control device is DC: characterised by reference voltage circuitry, e.g. soft start, remote…
G05F 1/613
Wherein the variable actually regulated by the final control device is DC: using semiconductor devices in parallel with the load as final control…

Voltage regulator circuit and method for regulating a voltage

Life of this patent

Voltage regulator circuit and method for regulating a voltage

Life of this patent

Abstract

Claims20