Power supply contention prevention circuit

Details Power supply contention prevention circuit Power supply contention prevention circuit

1996-01-11

1998-09-15

Leja, Ronald W.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Selective or optional sources

307147, 365226, H02J 100, G11C 700

Patent

active

058083774

ABSTRACT:
Where a computer system PC board has two separate power planes at different voltage levels and a CPU accesses both power planes, a system for detecting when a CPU will short the two power planes and shutting down the power to the lower voltage plane. The contention prevention circuit consists of a voltage level detection circuit having an input connected to the core power plane. The voltage level detection circuit is connected to the input of a shutdown circuit. Upon receipt of a signal from the voltage level detection circuit indicating that the voltage on the core power plane is greater than that provided by the core power supply, the shutdown circuit disables the core power supply.

REFERENCES:
patent: 5436585 (1995-07-01), DiMarco
patent: 5440520 (1995-08-01), Schutz et al.
patent: 5521530 (1996-05-01), Yao et al.
patent: 5550729 (1996-08-01), Wisell
patent: 5559966 (1996-09-01), Cho et al.

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