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US4471255A Surface acoustic wave parametric device 失效
表面声波参数装置

Surface acoustic wave parametric device
摘要:
An surface acoustic wave device, especially amplifier which includes input and output means for electrical signals provided so as to be spaced on a surface of a piezoelectric material which comprises a laminate in combination with a semiconductor, and an electrode provided in a surface signal wave propagation path between said input and output means for supplying pumping power.
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