SURFACE ACOUSTIC WAVE DEVICE

SURFACE ACOUSTIC WAVE DEVICE

PURPOSE:To increase guaranteed attenuation, by adjusting capacitance formed with auxiliary electrodes, through the provision of a plurality of the auxiliary electrodes between common electrodes of cross finger electrodes and short- circuiting some of the electrodes for a prescribed number. CONSTITUT...

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Hauptverfasser: NISHIKAWA TSUTOMU, TANI ATSUSHI, KISHI SHIYOUICHI
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
RESONATORS
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creator NISHIKAWA TSUTOMU
TANI ATSUSHI
KISHI SHIYOUICHI
description PURPOSE:To increase guaranteed attenuation, by adjusting capacitance formed with auxiliary electrodes, through the provision of a plurality of the auxiliary electrodes between common electrodes of cross finger electrodes and short- circuiting some of the electrodes for a prescribed number. CONSTITUTION:Input and output transducers 11 and 21 consisting of cross finger electrodes are provided on a piezoelectric base 10 to form a surface acoustic wave device. A plurality of auxiliary and short circuit electrodes 14, 24 and 15, 25 to form a capacitance are respectively provided between the cross finger electrodes 12, 13 and 22, 23. The capacitance added to the input and output transducers 11 and 21 can be adjusted by sequentially cutting off the electrodes 15 and 25. Through this adjustment, the guarantee attenuation can be increased for the surface acoustic wave device.
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subjects BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
RESONATORS
title SURFACE ACOUSTIC WAVE DEVICE
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