Remote keyless entry circuit having transient pulse suppression

摘要

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.