Charging a transponder in a security system

Details Charging a transponder in a security system Charging a transponder in a security system

1997-04-21

1998-08-04

Hofsass, Jeffery

Communications: electrical

Land vehicle alarms or indicators

Of burglary or unauthorized use

34082534, 34082531, 307 104, 307 105, 342 44, B60R 2510

Patent

active

057900140

ABSTRACT:
A security system utilizing a key-mounted transponder achieves fast and accurate charging of the transponder by using a frequency search and acquisition phase which attempts partial charging pulses at a plurality of spaced frequencies. After a successful partial charging, a frequency calibration signal is received from the transponder which provides a reference in the transceiver for producing a pulse for fully charging the transponder. Frequency search and acquisition allows robust system operation while using low cost and low tolerance parts.

REFERENCES:
patent: 3981011 (1976-09-01), Bell, III
patent: 4918955 (1990-04-01), Kimura et al.
patent: 5053774 (1991-10-01), Schuermann et al.
patent: 5227798 (1993-07-01), Hildebrand
patent: 5294931 (1994-03-01), Meier
patent: 5355137 (1994-10-01), Schurmann
patent: 5461386 (1995-10-01), Knebelkamp
patent: 5483193 (1996-01-01), Kennedy et al.
patent: 5523746 (1996-06-01), Gallagher
patent: 5541604 (1996-07-01), Meier
patent: 5561420 (1996-10-01), Kleefeldt et al.
patent: 5616966 (1997-04-01), Fischer et al.
patent: 5625349 (1997-04-01), Disbrow et al.

Affiliated with

Also associated with

Rating

Charging a transponder in a security system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Charging a transponder in a security system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Charging a transponder in a security system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1181853