US 2025/0141332 A1 · Signal Conversion Apparatus and Control Method

Abstract

An apparatus includes a first differential pair having a first transistor and a second transistor, wherein a gate of the first transistor is configured to receive a first current sensing signal, and a gate of the second transistor is configured to receive a second current sensing signal, a second differential pair having a third transistor and a fourth transistor, wherein a gate of the third transistor is configured to receive a predetermined reference, and a gate of the fourth transistor is connected to a capacitor, and a high gain stage comprising a first leg and a second leg, wherein a first node of the first leg is connected to a drain of the first transistor and a drain of the fourth transistor, and a second node of the second leg is connected to a drain of the second transistor and a drain of the third transistor.

Claims20

Dependent claims

An apparatus comprising:

a first differential pair having a first transistor and a second transistor, wherein a gate of the first transistor is configured to receive a first current sensing signal, and a gate of the second transistor is configured to receive a second current sensing signal;
a second differential pair having a third transistor and a fourth transistor, wherein a gate of the third transistor is configured to receive a predetermined reference, and a gate of the fourth transistor is connected to a capacitor;
and
a high gain stage comprising a first leg and a second leg, wherein a first node of the first leg is connected to a drain of the first transistor and a drain of the fourth transistor, and a second node of the second leg is connected to a drain of the second transistor and a drain of the third transistor, and wherein the high gain stage is configured to regulate a voltage across the capacitor.

1 more element

A method comprising:

configuring a first input of a current sensing apparatus to be coupled to a first terminal of a current sense device and a second input of the current sensing apparatus to be coupled to a second terminal of the current sense device;
configuring the current sensing apparatus to generate a differential signal formed by a first current sensing signal and a second current sensing signal;
and
configuring a signal conversion apparatus to convert the differential signal into a single-ended signal through receiving the differential signal, performing a dc detection on the differential signal, filtering noise components from the differential signal, and level-shifting the differential signal based on a predetermined reference.

1 more element

A power converter comprising:

a first power switch and a second power switch connected in series between an input voltage bus and ground;
an inductor connected between a common node of the first power switch and the second power switch and a first terminal of a current sense device;
a capacitor connected between a second terminal of the current sense device and ground;
a current sensing apparatus having a first input connected to the first terminal of the current sense device and a second input connected to the second terminal of the current sense device, wherein the current sensing apparatus is configured to generate a differential signal formed by a first current sensing signal and a second current sensing signal;
and
a signal conversion apparatus configured to convert the differential signal into a single-ended signal across a capacitor through receiving the differential signal, performing a dc detection on the differential signal, filtering noise components from the differential signal, and level-shifting the differential signal based on a predetermined reference.

3 more elements

Dependencies are inferred from the claim text.

Signal Conversion Apparatus and Control Method

Life of this patent

Signal Conversion Apparatus and Control Method

Life of this patent

Abstract

Claims20