US 12,248,007 B2
Apparatus for measuring voltage
Su Hun Yang, Yongin-si (KR)
Assigned to Hyundai Mobis Co., Ltd., Seoul (KR)
Filed by HYUNDAI MOBIS CO., LTD., Seoul (KR)
Filed on Mar. 2, 2023, as Appl. No. 18/116,523.
Claims priority of application No. 10-2022-0152608 (KR), filed on Nov. 15, 2022.
Prior Publication US 2024/0159805 A1, May 16, 2024
Int. Cl. G01R 19/25 (2006.01); H01M 10/48 (2006.01); H03M 3/00 (2006.01)
CPC G01R 19/2509 (2013.01) [H01M 10/48 (2013.01); H03M 3/458 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An apparatus for measuring a voltage, comprising:
a primary integrator circuit configured to operate as a first integral stage of a sigma-delta analog-to-digital converter circuit when switched by a first control signal from a controller;
a secondary integrator circuit configured to operate as a second integral stage when switched by a second control signal from the controller;
a comparator configured to compare final voltages modulated through the primary integrator circuit and the secondary integrator circuit; and
a digital filter configured to
delay an output of the comparator by a specified number of clocks according to a switching of the controller,
pass the delayed output through a digital-to-analog converter to feed the delayed output back to the primary and secondary integrator circuits, and
receive the delayed output signal of the comparator as an input,
wherein an output of the digital filter becomes a final measured value,
wherein the controller sequentially operates the primary integrator circuit and the secondary integrator circuit.