Frequency-variable acoustic thin film resonator, filter and communication apparatus using the same
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United States of America Patent
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Jul 26, 2011
Grant Date -
Nov 5, 2009
app pub date -
Aug 1, 2007
filing date -
Aug 3, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
that controls a value of the load. Thereby, an acoustic thin film resonator element is formed so that an electric signal inputted from the primary electrodes is outputted from the secondary electrodes by a piezoelectric effect, and a resonant frequency and an antiresonant frequency are made variable through the control of the value of the load. A resonant frequency and an antiresonant frequency are made variable at the same time without resonant characteristics being deteriorated.
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