Apparatus using serial data line to turn on a transceiver or oth

Details Apparatus using serial data line to turn on a transceiver or oth Apparatus using serial data line to turn on a transceiver or oth

1992-11-13

1994-12-20

Voeltz, Emanuel T.

Electric power conversion systems

Current conversion

With starting arrangement

323901, 375 8, 379 98, H02M 1100, H04M 1100

Patent

active

053750519

ABSTRACT:
An apparatus and a method for using a serial data line to turn on an electrical device are disclosed. Energy is extracted from a data signal on an asynchronous serial data line using a charge pump. The extracted energy is used by a power supply switching circuit to turn power on. Once turned on, power is kept on by a keepalive circuit. A shutdown signal causes the power to be turned off.

REFERENCES:
patent: 4288831 (1981-09-01), Dolikian
patent: 4373117 (1993-02-01), Pierce
patent: 4395590 (1983-07-01), Pierce et al.
patent: 4578533 (1986-03-01), Pierce
patent: 4671721 (1987-03-01), Busam et al.
patent: 4691344 (1987-09-01), Brown et al.
patent: 5086454 (1992-02-01), Hirzel
Attachment Ho8, "PCMCIA I/O Card Interface Specification", Revision 1.00, Draft, PCMCIA, May 6, 1992 (6 pages).

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