Electronic system with variable threshold power failure signalin

Details Electronic system with variable threshold power failure signalin Electronic system with variable threshold power failure signalin

1994-01-31

1995-07-25

MacDonald, Allen R.

Excavating

371 66, 307 22, 364483, 361 78, G08B 2100, G06F 1100

Patent

active

054370400

ABSTRACT:
A digital electronics system, such as a computer, includes circuits which provides signals proportional to the instantaneous voltage and current on the power bus to a microprocessor. The microprocessor uses these signals, the capacitance of the system filter capacitors, and the desired time for the system voltage to remain above a minimum voltage, to calculate an instantaneous voltage threshold. When the power bus voltage falls below this threshold voltage, the microprocessor provides a signal warning of impending power failure. The product of the voltage and current, i.e. the instantaneous system power, is displayed on an alphanumeric LED on the front panel of the computer.

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