Power stealing circuit

Details Power stealing circuit Power stealing circuit

1991-01-04

1993-06-08

Pellinen, A. D.

Electrical transmission or interconnection systems

Plural load circuit systems

Selectively connected or controlled load circuits

3072968, 307359, H03K 5153

Patent

active

052182355

ABSTRACT:
Power stealing circuit receives data signals on its signal input terminal and diverts some power from the signal input terminal to its power output terminal to power another circuit. When the voltage on the signal input terminal exceeds the voltage on the power output terminal, positive supply power is "stolen" from the signal input terminal to the power output terminal. When the signal input terminal is below the power output terminal, the two terminals are disconnected. A similar circuit "steals" negative supply power. In some embodiments, a comparator compares the voltages on the two terminals and regulates the power stealing operation.

REFERENCES:
patent: 4245319 (1981-01-01), Hedges
patent: 4360739 (1982-11-01), Goldstein
patent: 4372675 (1983-02-01), Sahay
patent: 4494244 (1985-01-01), Arndt et al.
patent: 4753388 (1988-06-01), Rummage
patent: 4776514 (1988-10-01), Johnston et al.
patent: 5034626 (1991-07-01), Pirez et al.
Paul R. Gray et al., "Analysis and Design of Analog Integrated Circuits", Second Edition, John Wiley & Sons, 1984, pp. 393-394, 734-735.
A. R. Alvarez (edited by), "BiCMOS Technology and Applications", Kluwer Academic Publishers, 1989, pp. 160-161.

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