US 12,442,841 B2
Current sensing circuit with integrated resistor and dual sense amplifiers
Ryan Desrosiers, Fort Collins, CO (US); Jay Ackerman, Loveland, CO (US); and Mark Rutherford, Wellington, CO (US)
Assigned to Avago Technologies International Sales Pte. Limited, Singapore (SG)
Filed by Avago Technologies International Sales Pte. Limited, Singapore (SG)
Filed on Jun. 30, 2022, as Appl. No. 17/855,197.
Prior Publication US 2024/0003941 A1, Jan. 4, 2024
Int. Cl. H02J 7/00 (2006.01); G01R 19/00 (2006.01); H02J 50/10 (2016.01); H03F 3/45 (2006.01)
CPC G01R 19/0023 (2013.01) [H02J 50/10 (2016.02); H03F 3/45475 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An integrated circuit comprising:
a first resistor coupled between a first node and a second node; wherein the first resistor has a first resistance (Rs); wherein the first resistor is configured to carry a first current (Isns) across the first resistor when the first node has a first voltage (Vrect) and the second node has a second voltage (Vmid);
a first amplifier including a first input coupled to the first node and a second input coupled to the second node; the first amplifier configured to output a third voltage (Vo);
a second resistor and a third resistor; wherein the second resistor and the third resistor each have a second resistance (Rt); wherein the second resistor is coupled between the first node and a first input of the first amplifier; wherein the third resistor is coupled between the second node and a second input of the first amplifier;
a plurality of switches for measuring an offset; and
a second amplifier including a third input coupled to the first node and a fourth input coupled to the second node; the second amplifier configured to output a fourth voltage (Van).