Input buffer for semiconductor device

Details Input buffer for semiconductor device Input buffer for semiconductor device

1998-11-18

2000-09-26

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 77, 327563, H03K 5153

Patent

active

061247383

ABSTRACT:
A voltage shift circuit included in an input buffer for a semiconductor integrated circuit device converts an external reference potential to a first signal of a predetermined potential. A voltage shift circuit converts the external signal obtained by superposing a logic signal of a small amplitude on an external reference potential to a second signal obtained by superposing a complementary signal of the logic signal with small amplitude on the first signal. Differential amplifying circuit compares the potentials of the first signal and the second signal and applies a signal corresponding to the result of comparison to internal circuitry. Therefore, normal operation is ensured even when an arbitrary potential between 1.25 V to 2.9 V is applied as the external reference potential.

REFERENCES:
patent: 5541538 (1996-07-01), Bacrania et al.
patent: 5568074 (1996-10-01), Kitaguchi et al.
patent: 5581206 (1996-12-01), Chevallier et al.
patent: 5666075 (1997-09-01), Schinzel

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