Guided wave radar delay lock loop circuit
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United States of America Patent
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Sep 1, 2015
Grant Date -
May 8, 2014
app pub date -
Nov 5, 2012
filing date -
Nov 5, 2012
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Abstract
A guided wave radar level measurement instrument comprises a probe defining a transmission line for sensing material level. A probe interface circuit is connected to the probe for generating pulses on the transmission line and receiving reflected signals from the transmission line. The probe interface circuit comprises a transmit pulse generator for generating a transmit pulse, a sample pulse generator for generating a sample pulse, and a delay lock loop for controlling the transmit and sample pulse generators. The delay lock loop is controlled by a pulse repetition frequency having a duty cycle less than 50%.
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