Interface circuit and portable electronic device employing...

Details Interface circuit and portable electronic device employing... Interface circuit and portable electronic device employing...

2011-08-30

2011-08-30

Nguyen, Danny (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

C361S056000

Reexamination Certificate

active

08009400

ABSTRACT:
An interface circuit for connecting with a universal serial bus (USB) data cable includes a USB connector for connecting with the USB data cable, an over voltage protection (OVP) circuit connected to the USB connector, and a time delay circuit connected to the USB connector and the OVP circuit to control the OVP circuit. The OVP circuit is switched off in a predetermined delay time of the time delay circuit when the USB data cable is connected to the USB connector, and is then switched on after the delay time of the time delay circuit.

REFERENCES:
patent: 2004/0109271 (2004-06-01), Takeda
patent: 2009/0109587 (2009-04-01), Smith et al.
patent: 2010/0073837 (2010-03-01), Predtetchenski et al.

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