Power up reset circuit for line powered circuit

Details Power up reset circuit for line powered circuit Power up reset circuit for line powered circuit

2006-08-22

2006-08-22

Nguyen, Duc (Department: 2643)

Telephonic communications

Subscriber line or transmission line interface

Protective circuit

C379S322000, C379S413000

Reexamination Certificate

active

07095848

ABSTRACT:
A system for powering up an electronic circuit with telephone line power such that the electronic circuit does not enter a lockup state. The system includes a voltage detector that measures the voltage across the telephone line and a switch coupled with the voltage detector. The voltage detector generates a Reset signal when the measured voltage exceeds a selected voltage level, and the switch applies power to the electronic circuit in response to the generated Reset signal.

REFERENCES:
patent: 5471524 (1995-11-01), Colvin et al.
patent: 5783999 (1998-07-01), Price et al.
patent: 6149319 (2000-11-01), Richter et al.
patent: 6204706 (2001-03-01), Horvath
patent: 6411680 (2002-06-01), Rousse
patent: 2495866 (1980-12-01), None

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