Electronic digital logic circuitry – Interface – Current driving
Reexamination Certificate
2007-11-02
2009-12-01
Chang, Daniel D (Department: 2819)
Electronic digital logic circuitry
Interface
Current driving
C326S062000, C327S415000, C327S547000
Reexamination Certificate
active
07626421
ABSTRACT:
An interface circuit and an electronic device are used for expanding an output port of a micro processing unit. The interface circuit includes an input port electrically connected to the output port of the micro processing unit for receiving a control signals, and a plurality of output ports selectively driven to control external circuits by inputting different values of the control signal at the input port.
REFERENCES:
patent: 4027208 (1977-05-01), Look
patent: 6351175 (2002-02-01), Rapp
patent: 6772380 (2004-08-01), Ali et al.
Ding Lin-Kun
Shan Jiang-Feng
Wong Shih-Fang
Zhou Xiang-Ping
Chang Daniel D
Hon Hai Precision Industry Co. Ltd.
Hong Fu Jin Precision Industry ( ShenZhen) Co., Ltd.
Niranjan Frank R.
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