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序号	专利名	申请号	申请日	公开（公告）号	公开（公告）日	发明人
1	SYSTEM AND METHOD FOR CONVERGING CURRENT WITH TARGET CURRENT IN DEVICE UNDER TEST	US14265772	2014-04-30	US20150316607A1	2015-11-05	Katsuhito Iwasaki; Masaharu Goto; Tomonori Ura
A test system measures parameters of a device under test (DUT), including a transistor. The test system includes a first voltage source unit for supplying a gate voltage; a second voltage source unit for supplying one of a drain voltage or a source voltage, the second voltage source having a current measurement device for detecting one of a drain current or a source current flowing through the transistor, respectively; a feedback unit for outputting a feedback current, based on the one of the drain or source currents; and an error amplifier for outputting a feedback control signal, based on comparison of the feedback current and a target current value. The first voltage source unit adjusts the gate voltage based on the feedback control signal so that the one of the drain or source currents converges to match the target current value.
2	System and method for converging current with target current in device under test	US14265772	2014-04-30	US09547035B2	2017-01-17	Katsuhito Iwasaki; Masaharu Goto; Tomonori Ura
A test system measures parameters of a device under test (DUT), including a transistor. The test system includes a first voltage source unit for supplying a gate voltage; a second voltage source unit for supplying one of a drain voltage or a source voltage, the second voltage source having a current measurement device for detecting one of a drain current or a source current flowing through the transistor, respectively; a feedback unit for outputting a feedback current, based on the one of the drain or source currents; and an error amplifier for outputting a feedback control signal, based on comparison of the feedback current and a target current value. The first voltage source unit adjusts the gate voltage based on the feedback control signal so that the one of the drain or source currents converges to match the target current value.

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