US 12,248,023 B2
Output voltage compensation method
Chih-Huan Fang, Taoyuan (TW)
Assigned to Chroma ATE Inc., Taoyuan (TW)
Filed by Chih-Huan Fang, Taoyuan (TW)
Filed on Dec. 27, 2022, as Appl. No. 18/088,792.
Claims priority of application No. 110149238 (TW), filed on Dec. 29, 2021.
Prior Publication US 2023/0251313 A1, Aug. 10, 2023
Int. Cl. G01R 31/319 (2006.01); G01R 19/00 (2006.01)
CPC G01R 31/31924 (2013.01) [G01R 19/0092 (2013.01)] 5 Claims
OG exemplary drawing
 
1. An output voltage compensation method, for a DC voltage source having a constant voltage circuit and a constant current circuit connected in series, and the DC voltage source provides an output voltage to a device under test (DUT), and the output voltage compensation method comprising:
generating a voltage compensation value by the constant voltage circuit according to a load current and a gain parameter of the DUT;
generating a virtual current setting value by the constant voltage circuit according to a voltage setting value and the voltage compensation value;
generating a duty cycle command by the constant current circuit according to the virtual current setting value and a load current measurement value of the load current; and
generating the output voltage conforming to the voltage setting value by the constant current circuit according to the duty cycle command;
wherein the gain parameter is related to a multiplier parameter of the constant voltage circuit,
wherein the constant current circuit provides the output voltage to the DUT.