Driver circuit integrated with load current output circuit, pin electronics and IC tester having thereof
AssigneeHitachi Electronics Engineering Co., Ltd.
InventorsKeizo Takechi, Akio Ohsaki, Yoshihiko Hayashi, Kazuhiko Murata
Life of this patent
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Abstract
A driver circuit integrated with a load current output circuit has a function as a driver for applying a predetermined test waveform to a device under test (DUT), and a function as a load current output for reproducing an actual use situation by receiving the load current to the DUT to judge a response waveform by receiving the response waveform from the DUT. Both functions are made up on a common circuit, operate as the driver circuit when applying the test waveform, and operate as the load current output circuit when judging the response waveform.
Claims15
A driver circuit integrated with a load current output circuit, wherein said driver circuit integrated with a load current output circuit has a function as a driver for applying a predetermined test waveform to a device under test (DUT), and a function as a load current output for reproducing an actual use situation by receiving said load current to said DUT to judge a response waveform by receiving said response waveform from said DUT, both functions being made up on a common circuit, operates as said driver circuit when applying said test waveform, and operates as said load current output circuit when judging said response waveform.
A driver circuit integrated with a load current output circuit, comprising:
- a buffer circuit for a push-pull operation, a constant current portion, a current control portion connected to an output terminal of said buffer circuit and said constant current portion and constituted of an one-way conduction element capable of supplying a current of one direction or reversed direction with respect to said DUT, wherein said driver function and said load current output function are provided by controlling said current at said constant current portion.
A driver circuit integrated with a load current output circuit, comprising:
- a first buffer circuit having a first output terminal;
- a second buffer circuit having a second output terminal;
- and a diode bridge terminal having a pair of a third and fourth output terminals each connected to said first and said second output terminals, wherein said fourth output terminal supplies a current as a driver when outputting a test waveform to a device under test (DUT), and said DUT supplies a load current to said fourth output terminal therefrom by turning the second buffer circuit OFF when judging a status of a response waveform by receiving said waveform from said DUT.
Dependencies are inferred from the claim text.