Periodic signal generators having microelectromechanical resonators therein that support generation of high frequency low-TCF difference signals
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United States of America Patent
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Jun 3, 2014
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N/A
app pub date -
Jul 19, 2011
filing date -
Aug 31, 2009
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Abstract
A periodic signal generator is configured to generate high frequency signals characterized by relatively low temperature coefficients of frequency (TCF). A microelectromechanical resonator, such as concave bulk acoustic resonator (CBAR) supporting capacitive and piezoelectric transduction, may be geometrically engineered as a signal generator that produces two periodic signals having unequal resonant frequencies with unequal temperature coefficients. Circuitry is also provided for combining the two periodic signals using a mixer to thereby yield a high frequency low-TCF periodic difference signal at an output of the periodic signal generator.
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