Line-doubler delay circuit
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United States of America Patent
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-
May 29, 2007
Grant Date -
Feb 9, 2006
app pub date -
Sep 23, 2004
filing date -
Aug 6, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The length of a transmission line delay circuit is halved by inserting a directional coupler in the signal path ahead of the transmission line and either open circuiting or short circuiting the other end of the transmission line. The signal traveling through the directional coupler and through the transmission line is reflected back at the end of the transmission line, and the reflected signal is carried to the coupled output of the directional coupler. Since the signal travels through the transmission line twice, the delay time is doubled. Therefore, for a given delay requirement, the length of transmission line required is only half of the length required for prior art transmission delay lines.
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