Semiconductor device having transfer gate between pre-buffer...

Details Semiconductor device having transfer gate between pre-buffer... Semiconductor device having transfer gate between pre-buffer...

2008-06-24

2010-02-16

Le, Don P (Department: 2819)

Electronic digital logic circuitry

Interface

Current driving

C326S027000

Reexamination Certificate

active

07663407

ABSTRACT:
A semiconductor device includes a pre-buffer for transferring a data signal on the basis of a first power supply voltage, a main buffer for amplifying and outputting the data signal transferred by the pre-buffer on the basis of a second power supply voltage different from the first power supply voltage, a switch unit for controlling a conductive state between the pre-buffer and the main buffer on the basis of a switch control signal, and a control circuit for generating the switch control signal for controlling the pre-buffer to set an output level of the pre-buffer to ground potential in accordance with transition of logical level of the switch control signal.

REFERENCES:
patent: 6313957 (2001-11-01), Heemstra et al.
patent: 2009/0230993 (2009-09-01), Momtaz
patent: 10-308098 (1998-11-01), None
“USB Complete SIB Access” by Acserson and Jan (translated by Insight International), Sold by Seiunsha Publishing Co., Ltd., P380, chapter 210 Electrical Interface Circuit (USB Transceiver).

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