Patent ID: 9729359
Date: 2017-08-08
CPC Classifications: G07C,H01Q,H03K,H04L

Claim:
1. A method, comprising: receiving a radio frequency signal at a first antenna; forming a first rectified waveform signal from the received radio frequency signal, the first rectified waveform signal having a constant level portion and a second portion corresponding to half of a waveform of the received radio frequency signal; forming a second rectified waveform signal from the received radio frequency signal having a constant level portion and a second waveform portion that is of opposite phase to the second portion of the first rectified waveform signal; forming a regenerated clock signal from the first rectified waveform signal and the second waveform rectified signal; forming a first periodic sloped waveform signal having a linear slope from the regenerated clock signal; forming a second periodic sloped waveform signal having a linear slope from the regenerated clock signal, the second periodic sloped waveform signal being of opposite phase as the first period sloped waveform signal; comparing the first periodic sloped waveform signal to the second periodic sloped waveform signal, and outputting a compare signal when the first periodic sloped waveform signal and the second periodic sloped waveform signal have equal magnitudes; forming a third clock signal having transition edges corresponding to transitions in the compare signal; and outputting a pulse waveform on a pluck signal responsive to the transition edges of the third clock signal.