A wireless sensor reader is provided to interface with a wireless sensor. The wireless sensor reader transmits an excitation pulse to cause the wireless sensor to generate a ring signal. The wireless sensor reader receives and amplifies the ring signal and sends the signal to a phase-locked loop. A voltage-controlled oscillator in the phase-locked loop locks onto the ring signal frequency and generates a count signal at a frequency related to the ring signal frequency. The voltage-controlled oscillator is placed into a hold mode where the control voltage is maintained constant to allow the count signal frequency to be determined.
申请公布号
EP2417590(A4)
申请公布日期
2013.01.23
申请号
EP20100762085
申请日期
2010.03.19
申请人
ENDOTRONIX, INC.
发明人
ROWLAND, HARRY;WATKINS, ROGER;SUNDARAM, BALAMURUGAN;PAUL, BRIAN;AHN, IN, SOO;NAGY, MICHAEL