Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1996-12-17
1999-05-11
Ton, My-Trang Nu
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
361 91, G05F1/10
Patent
active
059031840
ABSTRACT:
A semiconductor device is provided with a protection circuit, between a terminal and an input/output circuit of the semiconductor device, that protects the input/output circuit and an internal circuit of the semiconductor device against application of a high voltage due to static electricity. Protection is achieved by short-circuiting the terminal via a resistor with a power source voltage line or a reference potential line when a voltage exceeding a predetermined value is applied to the terminal. The semiconductor device is further provided with an across-power-source protection circuit, close to the protection circuit, that short-circuits the power source voltage line with the reference potential line when a difference in potential between the power source voltage line and the reference potential line falls outside a predetermined range, so that partial potential variations in the power source voltage line or reference potential line, which arise from wiring resistances when either of these lines is short-circuited to the terminal by the protection circuit, are suppressed.
REFERENCES:
patent: 4858055 (1989-08-01), Okitaka
patent: 5477414 (1995-12-01), Li et al.
patent: 5617283 (1997-04-01), Krakauer et al.
An excerpt from a book "Physics of VLSI Devices" (co-authored by Kishino and Koyanagi) published on Jul. 25, 19986 by Maruzen Co., Ltd., Chapter 4 "Bipolar Devices", Section 6 Various Phenomena Observed in Bipolar Devices (pp. 230-233) (together with a copy of its translation).
Nu Ton My-Trang
Rohm & Co., Ltd.
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