Are Sand 9 resonators fundamental or overtone devices?

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Sand 9’s MEMS resonators are fundamental frequency resonators.  Operating at the fundamental frequency simplifies the design of higher frequency oscillators.  Another advantage of Sand 9’s MEMS process is that all frequencies, low and high, are implemented in very small resonator geometries.  The current wafer level package is ¼ the size of the smallest quartz package.
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What is the possibility of fine tuning the frequency with a voltage? A “VCMO” would be desirable even if the final frequency would require a synthesizer post stage.

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Sand 9’s MEMS technology can be used to make Voltage Controlled MEMS Oscillators (VCMOs). The VCMO would offer several advantages over quartz: e.g., low phase noise, high fundamental frequency, vibration immunity and package integration. The higher fundamental frequency would enable lower noise frequency synthesizers, benefiting performance-demanding applications. The high fundamental frequency is especially useful when […]
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Do Sand 9 MEMS have any cold or hot start-up issues similar to quartz?

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No.  While the start-up time for quartz is not always fast or consistent over operating temperature, Sand 9 start-up times are consistent and predictable, thereby easing system level design.
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How does an activity dip impact end user experience?

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Activity dips, static popping and poor temperature slew can result in dropped packets, loss of cellular signal and loss of GPS lock or increased time to acquire GPS.  All three phenomena can negatively impact end user experience and network efficiency.
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What causes an activity dip and why are Sand 9 products activity dip-free?

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Intrinsic Eigen modes and mechanical stresses result in multiple spurious modes that approach and, in many cases, cross the fundamental frequency.  When spurious modes approach or cross the fundamental frequency, either static popping or an activity dip is experienced, both of which impact performance.  While quartz manufacturers add manufacturing cost by attempting to pre-stress and […]
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