US 11,747,390 B2
Apparatus and method for measuring dynamic on-resistance of GaN-based device
Rong Yang, Suzhou (CN); Sichao Li, Suzhou (CN); Chunhua Zhou, Suzhou (CN); and Donghua Bai, Suzhou (CN)
Assigned to INNOSCIENCE (SUZHOU) TECHNOLOGY CO., LTD., Suzhou (CN)
Appl. No. 17/267,505
Filed by Innoscience (Suzhou) Technology Co., Ltd., Suzhou (CN)
PCT Filed Jan. 15, 2021, PCT No. PCT/CN2021/072012
§ 371(c)(1), (2) Date Feb. 10, 2021,
PCT Pub. No. WO2022/151308, PCT Pub. Date Jul. 21, 2022.
Prior Publication US 2022/0373590 A1, Nov. 24, 2022
Int. Cl. G01R 31/26 (2020.01)
CPC G01R 31/2621 (2013.01) 18 Claims
OG exemplary drawing
 
1. An apparatus for measuring dynamic on-resistance of a GaN-based device under test (DUT) comprising a first power terminal electrically connected to a first output node of a power supply, a second power terminal electrically connected to a second input node of the power supply, and a control terminal connected to an output of a first controlling module being configured to generate a first control signal to switch on and off the DUT, the apparatus comprising:
an input interface comprising a first input node configured for being electrically connected to the first power terminal of the DUT, a second input node configured for being electrically connected to the second power terminal of the DUT, and a control input node configured for being electrically connected to the output of the first controlling module;
an output interface comprising a first output node configured for being electrically connected to a first signal input node of an electrical signal monitoring equipment and a second output node connected to the second input node and configured for being electrically connected to a second signal input node of the electrical signal monitoring equipment;
a switching device comprising a control terminal, a first power terminal electrically connected to the first input node, and a second power terminal electrically coupled to the first output node through an impedance matching module and coupled to the second output node through a noise absorption circuit module;
a second controlling module comprising an input terminal electrically connected to the control input node and an output terminal electrically connected to the control terminal of the switching device; and being configured to:
receive the first control signal from the first controlling module; and generate a second control signal to switch on and off the switching device such that the switching device is turned on later than the DUT for a first time interval and turned off earlier than the DUT for a second time interval,
wherein the second controlling module comprises:
a driving module configured to receive a driver input signal and an enabling signal, and generate the second control signal to switch on and off the switching element;
a first delay module configured to receive the first control signal and generate the driver input signal to the driving module;
a second delay module configured to receive the first control signal; and
a level reversal module connected to the second delay module and configured to generate the enabling signal to the driving module.