Thermal noise of MOS transistors
Thermal noise of MOS transistors
复制标题
MOS晶体管的热噪声
DOI：
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发表时间：
1967
期刊：
影响因子：
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通讯作者：
J. Prins
中科院分区：
文献类型：
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作者：
F. Klaassen;J. Prins
声表面波滤波器具有形成在压电基板的波传播表面上的偏置发射和接收换能器。两段多带耦合器插在传播表面上，并为耦合器通带内的信号提供“轨道切换”或“回避”作用。该耦合器包括由电连接的细丝导体对形成的分离连接部分和由电连续的细丝导体和在其中心处具有不连续性的交错导体形成的分离隔离部分。分离连接部分衰减耦合器阻带内的声波的对称模式分量，而分离隔离部分衰减耦合器阻带内的声波的反对称模式部分，从而产生改进的陷波响应。
An acoustic surface wave filter has offset transmitting and receiving transducers formed on the wave propagating surface of a piezoelectric substrate. A two-segment multistrip coupler is interposed on the propagating surface and provides "track switching" or "sidestepping" action for signals within the coupler passband. The coupler includes a split-connected portion formed by electrically connected filamentary conductor pairs and a split-isolated portion formed by electrically continuous filamentary conductors and interleaved conductors having a discontinuity at their center. The split-connected portion attenuates the symmetrical mode components of acoustic waves within the coupler stop band while the split-isolated portion attenuates the anti-symmetrical mode portion of acoustic waves within the coupler stop band, producing an improved trap response.