×

Radio frequency (RF) receiver with amplitude-shifted keying/frequency-shifted keying (ASK/FSK) duty cycle optimization algorithm

  • US 7,702,038 B2
  • Filed: 09/07/2006
  • Issued: 04/20/2010
  • Est. Priority Date: 09/16/2005
  • Status: Active Grant
First Claim
Patent Images

1. A method of operating a radio frequency (RF) receiver for an automobile comprising the steps of:

  • operating the RF receiver in a first mode for receiving Frequency Shift Keyed (FSK) modulated transmissions for a first period;

    switching the RF receiver to a second mode for receiving an Amplitude Shift Keyed (ASK) modulated transmission for a second period, shorter than the first period;

    switching the RF receiver back to the first mode responsive to the RF receiver determining that an ASK modulated transmissions is present;

    switching the RF receiver back to the second mode after a first known time interval such that the RF receiver can receive a second ASK modulated transmission; and

    maintaining the RF receiver in the second mode after the first known time interval to received the second ASK modulated transmission.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×