Electronic key system operable with charge capacitor power

Details Electronic key system operable with charge capacitor power Electronic key system operable with charge capacitor power

2005-11-15

2005-11-15

Horabik, Michael (Department: 2635)

Communications: electrical

Selective

Intelligence comparison for controlling

C340S005710, C340S010340

Reexamination Certificate

active

06965295

ABSTRACT:
An electronic key system has a portable electronic key and a transmitter provided in a vehicle. The key and the transmitter have respective LC resonance circuits including antenna coils that can be electromagnetically coupled. The portable device has a charge capacitor and a diode. The capacitor is charged with a voltage induced by the coil when the LC resonance circuit resonates. The electronic key is enabled to communicate with the transmitter with the charged voltage of the charge capacitor when a built-in battery runs down.

REFERENCES:
patent: 4868409 (1989-09-01), Tanaka et al.
patent: 5307658 (1994-05-01), Kokubu et al.
patent: 5745026 (1998-04-01), Kokubu et al.
patent: 6011320 (2000-01-01), Miyamoto et al.
patent: 6323566 (2001-11-01), Meier
patent: A-H07-69173 (1995-03-01), None
patent: A-H07-150835 (1995-06-01), None
patent: A-H11-59332 (1999-03-01), None
patent: A-2000-59271 (2000-02-01), None

Affiliated with

Also associated with

Rating

Electronic key system operable with charge capacitor power does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electronic key system operable with charge capacitor power, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic key system operable with charge capacitor power will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3476921