Detector generating a displacement signal by injection locking and injection pulling
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United States of America Patent
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Mar 7, 2017
Grant Date -
Oct 13, 2016
app pub date -
Mar 22, 2016
filing date -
Apr 8, 2015
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Abstract
A detector includes an oscillation source, a frequency multiplier, a transceiver and a demodulator. The oscillation source generates a first injection signal with a first frequency. The frequency multiplier receives the first injection signal, outputs an output signal and receives a second injection signal with a second frequency. The frequency multiplier uses injection locking to lock a frequency of the output signal at a multiple of the first frequency, and uses injection pulling to pull the frequency of the output signal to the second frequency. The transceiver transmits the output signal and receives a received signal with a third frequency for updating the second injection signal. The demodulator performs a demodulation operation according to the output signal so as to generate a displacement signal.
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