PIEZOELECTRIC ELEMENT FOR AN AUTOMATIC FREQUENCY CONTROL CIRCUIT, OSCILLATING MECHANICAL SYSTEM AND DEVICE COMPRISING THE SAME
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United States of America Patent
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Issued Date -
Mar 14, 2019
app pub date -
Aug 27, 2018
filing date -
Aug 27, 2018
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Abstract
A piezoelectric element for an automatic frequency control circuit. The element includes a balance spring formed of a piezoelectric crystal strip, a first electrode connected to the automatic control circuit, and disposed on at least a first side of the strip, and a second electrode connected to the automatic control circuit and disposed on at least a second side of the strip. The first and second electrodes are placed on one portion or over the entire length of the balance spring in a predetermined angular distribution.
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