Remote keyless entry circuit having transient pulse suppression

Details Remote keyless entry circuit having transient pulse suppression Remote keyless entry circuit having transient pulse suppression

2006-12-12

2006-12-12

Hofsass, Jeffery (Department: 2612)

Communications: electrical

Selective

Intelligence comparison for controlling

C340S005640, C307S010100, C307S010300, C714S699000, C375S346000, C455S343100

Reexamination Certificate

active

07148787

ABSTRACT:
A remote keyless entry (RKE) circuit (100) and method reduces the amount of current draw by duty cycling the RKE circuit (100) to ensure that a microcontroller (104) in the RKE circuit (100) is awakened only when needed to evaluate RF data. A total operating period for the RKE circuit (100) includes a transient period, a data monitoring period, and a sleep period. The RKE circuit (100) includes a pulse blocking circuit (109) that prevents a receiver stabilization pulse from waking up the microcontroller (104). If no data is received during the data monitoring period, the microcontroller (104) remains in a sleep mode for the remainder of the operating period.

REFERENCES:
patent: 5920268 (1999-07-01), Bucci et al.
patent: 5937065 (1999-08-01), Simon et al.
patent: 6236850 (2001-05-01), Desai

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