Serial interface connecting circuit for supporting...

Details Serial interface connecting circuit for supporting... Serial interface connecting circuit for supporting...

2007-07-16

2009-10-06

Epps, Georgia Y (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Signal isolator

C250S2140RC

Reexamination Certificate

active

07598510

ABSTRACT:
A serial interface connecting circuit includes a first IC (10) with a signal transmitting and a signal receiving terminal, a second IC (20) with a signal transmitting and a signal receiving terminal, and a connecting circuit (30) coupled between the first IC (10) and the second IC (20). The connecting circuit (30) includes a first photocoupler (16) having a first luminous element and a first optical receiving block, an anode of the first luminous element is coupled to a first power source (Vcc), a cathode of the first luminous element is coupled to the signal transmitting terminal of the first IC (10), a collector of the first optical receiving block is coupled to a second power source (Vdd) and the signal receiving terminal of the second IC (20), and an emitter of the first optical receiving block is coupled to ground.

REFERENCES:
patent: 4961205 (1990-10-01), Kuwaoka
patent: 5256882 (1993-10-01), Miyasaka
patent: 5748684 (1998-05-01), Sanchez
patent: 6977540 (2005-12-01), Vandenberg et al.
patent: 7359640 (2008-04-01), Onde et al.
patent: 2004/0084640 (2004-05-01), Cheyne et al.

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