Input circuit

Details Input circuit Input circuit

2006-11-28

2006-11-28

Pyo, Kevin (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Signal isolator

C327S514000

Reexamination Certificate

active

07141814

ABSTRACT:
An input circuit has a first current-limiting resistor, a second current-limiting resistor, and an AC-input photocoupler. The photocoupler has an input terminal connected to a first external terminal and another input terminal connected to a positive electrode through the first current-limiting resistor and also to a ground electrode through the second current-limiting resistor. The first external terminal is connected to a PNP transistor and NPN transistors.

REFERENCES:
patent: 6169491 (2001-01-01), McDonald
patent: 07295608 (1995-11-01), None
patent: 10-247846 (1998-09-01), None

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