Semiconductor device having ringing preventive circuit for remov

Details Semiconductor device having ringing preventive circuit for remov Semiconductor device having ringing preventive circuit for remov

1999-03-05

2000-05-23

Nguyen, Vinh P.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

324 731, 324765, G01R 3128

Patent

active

060669462

ABSTRACT:
A semiconductor device having a ringing preventive circuit adjacent to an output pin for removing ringing of a pulse signal output from an output stage. The ringing preventive circuit includes a buffer amplifier having an input terminal connected to the output stage, and an output terminal connected to the output pin; a first comparator having a first input terminal connected to the output terminal of the buffer amplifier, a second input terminal provided with a first reference voltage, and an output terminal, for outputting a first control signal from the output terminal in response to a result of a comparison between voltages on the first and second input terminals; and a first current supply circuit having a first terminal connected to a first power source for supplying a first supply voltage, a second terminal connected to the input terminal of the buffer amplifier, and a control signal input terminal connected to the output terminal of the first comparator, for controlling conduction and non-conduction of a current flowing from the first terminal to the second terminal as a function of the first control signal.

REFERENCES:
patent: 4507576 (1985-03-01), McCraken et al.
patent: 4947113 (1990-08-01), Chism et al.
patent: 5164663 (1992-11-01), Alcorn
patent: 5200696 (1993-04-01), Menis et al.
patent: 5266894 (1993-11-01), Takagi et al.
patent: 5436559 (1995-07-01), Takagi et al.
patent: 5736851 (1998-04-01), Noda

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