US 2026/0238197 A1Published application

Power converter current sense offset correction circuit

OwnerMustapha El-Markhi, Bikash Pradhan +2inventors

InventorsMustapha El-Markhi, Bikash Pradhan, Avadhut Junnarkar, Roland Son

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Abstract

Described embodiments include a circuit comprising a controller having four outputs. A switched capacitor circuit includes a first switch having a first terminal coupled to the output of an amplifier and a control terminal coupled to the first output of the controller. A second switch has a first terminal coupled to the first switch and a control terminal coupled to the second output of the controller. A third switch has a first terminal coupled to the output of the amplifier and a control terminal coupled to the third output of the controller. A fourth switch has a first terminal coupled to the third switch, a control terminal coupled to the fourth output of the controller, and a second terminal coupled to the second switch. A first capacitor is coupled to the second switch and ground. A second capacitor is coupled to the fourth switch and ground.

Claims21

Dependent claims

A circuit, comprising:

a controller having first, second, third and fourth outputs;
an amplifier having first and second inputs and an output;
a switched capacitor circuit that includes:
a first switch having first and second terminals and a control terminal, the first terminal coupled to the output of the amplifier, the control terminal coupled to the first output of the controller;
a second switch having first and second terminals and a control terminal, the first terminal coupled to the second terminal of the first switch, the control terminal coupled to the second output of the controller;
a third switch having first and second terminals and a control terminal, the first terminal coupled to the output of the amplifier, the control terminal coupled to the third output of the controller;
a fourth switch having first and second terminals and a control terminal, the first terminal coupled to the second terminal of the third switch, the control terminal coupled to the fourth output of the controller, and the second terminal coupled to the second terminal of the second switch;
a first capacitor having a first terminal coupled to the first terminal of the second switch and a second terminal coupled to a ground terminal;
and
a second capacitor having a first terminal coupled to the first terminal of the fourth switch and a second terminal coupled to the ground terminal.

7 more elements

A circuit, comprising:

a controller having first, second, third and fourth outputs;
a first amplifier having first and second inputs and an output, the first input coupled to a voltage terminal;
and
a switched capacitor circuit that includes:
a first switch having first and second terminals and a control terminal, the first terminal coupled to the output of the first amplifier, the control terminal coupled to the first output of the controller;
a second switch having first and second terminals and a control terminal, the first terminal coupled to the second terminal of the first switch, the control terminal coupled to the second output of the controller;
a third switch having first and second terminals and a control terminal, the first terminal coupled to the output of the first amplifier, the control terminal coupled to the third output of the controller;
a fourth switch having first and second terminals and a control terminal, the first terminal coupled to the second terminal of the third switch, the control terminal coupled to the fourth output of the controller, and the second terminal coupled to the second terminal of the second switch;
a first capacitor having a first terminal coupled to the first terminal of the second switch and a second terminal coupled to a ground terminal;
and
a second capacitor having a first terminal coupled to the first terminal of the fourth switch and a second terminal coupled to the ground terminal;
a second amplifier having an input and an output, the input coupled to the second terminal of the fourth switch;
a third amplifier having an input and an output, the input coupled to the voltage terminal;
a subtractor having first and second inputs and an output, the first input coupled to the output of the second amplifier, the second input coupled to the output of the third amplifier;
and
a fourth amplifier having an input and an output, the input coupled to the output of the subtractor, the output coupled to the second input of the first amplifier.

13 more elements

A system, comprising:

a multiphase voltage regulation controller having an input and multiple outputs;
multiple power stages, each respective power stage having an input and an output, each respective input coupled to a respective output of the multiphase voltage regulation controller, each respective power stage including:
a controller having first, second, third and fourth outputs;
an amplifier having first and second inputs and an output;
a switched capacitor circuit that includes:
a first switch having first and second terminals and a control terminal, the first terminal coupled to the output of the amplifier, the control terminal coupled to the first output of the controller;
a second switch having first and second terminals and a control terminal, the first terminal coupled to the second terminal of the first switch, the control terminal coupled to the second output of the controller;
a third switch having first and second terminals and a control terminal, the first terminal coupled to the output of the amplifier, the control terminal coupled to the third output of the controller;
a fourth switch having first and second terminals and a control terminal, the first terminal coupled to the second terminal of the third switch, the control terminal coupled to the fourth output of the controller, and the second terminal coupled to the second terminal of the second switch;
a first capacitor having a first terminal coupled to the first terminal of the second switch and a second terminal coupled to a ground terminal;
and
a second capacitor having a first terminal coupled to the first terminal of the fourth switch and a second terminal coupled to the ground terminal;
multiple inductors, each respective inductor having a first terminal and a second terminal, each respective first terminal coupled to a respective output of a power stage;
and
a processor having an input, the input coupled to each of the respective second terminals of the multiple inductors.

12 more elements

Dependencies are inferred from the claim text.

Facts

Application: 19/284,354Filed 29 Jul 2025
Priority: 13 Feb 2025
Published: 13 Aug 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H03K 5/003
Manipulating of pulses not covered by one of the other main groups of this subclass: changing the DC level
H02M 3/07
Using resistors or capacitors, e.g. potential divider: using capacitors charged and discharged alternately by semiconductor devices with control…
H02M 3/158
With automatic control of output voltage or current, e.g. switching regulators: including plural semiconductor devices as final control devices…
H02M 3/1584
Including plural semiconductor devices as final control devices for a single load: with a plurality of power processing stages connected in parallel