PHASE ERROR CORRECTION IN ROTARY TRAVELING WAVE OSCILLATORS
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United States of America Patent
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Issued Date -
May 13, 2010
app pub date -
Nov 10, 2008
filing date -
Nov 10, 2008
priority date (Note) -
Abandoned
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Abstract
An RTWO apparatus includes an N-phase RTWO (N is an integer greater than or equal to two) and a phase correction circuit. The N-phase RTWO includes a closed-loop transmission line formed as a Moebius strip. The closed-loop transmission line includes N transmission line segments, to which N voltage controlled capacitors are coupled. The N transmission line segments provide N output phases. The phase correction circuit operates to detect phase errors between output phases, and, depending on the detected phase errors, generates N control voltages for controlling the capacitances of the N voltage controlled capacitors. Controlling the capacitances of the N voltage controlled capacitors in this coordinated manner reduces the phase errors among the N output phases, thereby providing a phase accurate multi-phase RTWO output.
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