Self-powering input buffer

Details Self-powering input buffer Self-powering input buffer

2006-07-18

2006-07-18

DeBeradinis, Robert L. (Department: 2836)

Electrical transmission or interconnection systems

Vehicle mounted systems

Automobile

C307S009100, C307S010100

Reexamination Certificate

active

07078829

ABSTRACT:
A self-powering input buffer includes a first circuit leg that stores a charge, such as in a capacitor and a second circuit leg with a buffer powered by the first circuit leg that detects a state of an input with reference to a threshold. A transistor switch is coupled between the circuit legs. If the buffer detects an input voltage higher than the predetermined threshold the buffer drives the transistor switch ON to conduct current from the first circuit leg to the output. If the buffer detects an input voltage lower than the predetermined threshold the buffer drives the transistor switch OFF to disconnect the first circuit leg from the output. During a voltage dip the capacitor provides supplemental power as long as the input is above the threshold.

REFERENCES:
patent: 5014214 (1991-05-01), Glowczewski et al.
patent: 5438678 (1995-08-01), Smith
patent: 6249106 (2001-06-01), Turner et al.
patent: 6308688 (2001-10-01), French et al.
patent: 6614134 (2003-09-01), Davies
patent: 6747880 (2004-06-01), Grover
patent: 2001/0023488 (2001-09-01), Breunig et al.
patent: 2005/0029869 (2005-02-01), Teran et al.
patent: 0 142 776 (1992-05-01), None

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