公开(公告)号：US3697899A

公开(公告)日：1972-10-10

申请号：US3697899D

申请日：1971-04-05

Applicant: ZENITH RADIO CORP

Inventor： DIAS FLEMING

IPC: H03H9/02 ,  H03H9/145 ,  H03H7/30

CPC classification number: H03H9/14547 ,  H03H9/02787 ,  H03H9/02881 ,  H03H9/145 ,  H03H9/14561

Abstract: A surface wave integratable filter includes input and output transducers spaced apart on an acoustic wave propagating medium. The input transducer launches acoustic surface waves along a path in which the wavefronts diverge. Disposed on the medium between the input and output transducers is an acoustic lens formed of a material that exhibits an acoustical refractive index greater than one. The lens acts to change the width of the acoustic wavefront and thereby enables appropriate selection of the physical size of the output transducer so as to obtain desired input and output impedances while securing increased efficiency of interaction at the output transducer.

Abstract translation: 表面波可积分滤波器包括在声波传播介质上隔开的输入和输出换能器。 输入传感器沿着波前发散的路径发射声表面波。 介于输入和输出换能器之间的介质是由表现出大于1的声学折射率的材料形成的声透镜。 透镜用于改变声波前的宽度，从而能够适当地选择输出传感器的物理尺寸，从而获得期望的输入和输出阻抗，同时确保在输出换能器处增加的相互作用效率。

公开(公告)号：US3696479A

公开(公告)日：1972-10-10

申请号：US3696479D

申请日：1970-10-22

Applicant: ZENITH RADIO CORP

Inventor： DIAS FLEMING

IPC: H03H3/08

CPC classification number: H03H3/08 ,  Y10T29/42 ,  Y10T29/49007 ,  Y10T29/49993

Abstract: For connecting external leads to miniature solid-state devices of the type wherein an electric circuit element is photoetched, printed or otherwise bonded upon a substrate surface, lands are embedded in the substrate and exposed to the circuit supporting surface of the substrate. The lands provide a surface large enough to enable the circuit elements and external leads to be individually connected to separated regions of the exposed portion or portions of the lands.

Abstract translation: 为了将外部引线连接到类型的微型固态器件，其中电路元件被光刻，印刷或以其他方式结合到衬底表面上，焊盘嵌入衬底中并暴露于衬底的电路支撑表面。 焊盘提供足够大的表面，使得电路元件和外部引线可以单独地连接到暴露部分或焊盘部分的分离区域。

公开(公告)号：US3582540A

公开(公告)日：1971-06-01

申请号：US3582540D

申请日：1969-04-17

Applicant: ZENITH RADIO CORP

Inventor： ADLER ROBERT ,  DEVRIES ADRIAN J ,  DIAS FLEMING

IPC: H03B5/32 ,  H03D3/16 ,  H03D3/34 ,  H03H9/00 ,  H03H9/02 ,  H03H9/42 ,  H03H9/64 ,  H03H9/68 ,  H03H9/72 ,  H03H9/76 ,  H03K3/16 ,  H04N9/64 ,  H04N9/78 ,  H04N9/00 ,  H03B5/00 ,  H03H7/30

CPC classification number: H03H9/6436 ,  H03B5/32 ,  H03B5/326 ,  H03D3/16 ,  H03D3/34 ,  H03H9/0296 ,  H03H9/72 ,  H03K3/16 ,  H04N9/647 ,  H04N9/78

Abstract: A color television receiver employs surface wave integratable filters (SWIFS) in a number of its different stages. These include frequency discriminators, phase discriminators, phase shifters, gain control systems, phase splitters, phase delay systems, signal splitters and chroma demodulation systems. The delay in or the tuning of the different individual stages is facilitated by alterations of the velocity of wave propagation or the effective or actual length of the surface over which the waves propagate. In addition, spurious signal modes are minimized by polarizing only selected portions of the SWIFS.

Abstract translation: 用于在源和负载之间转换信号的可变传输装置包括传播声表面波的衬底。 耦合到衬底的表面并响应于所施加的信号的输入传感器用于发射声波。 输出传感器耦合到与输入换能器间隔开的一部分表面，并且响应于所发射的波，相对于输入信号导出对应于换能器之间的间隔的具有延迟的输出信号。 包括用于挠曲基板以改变表面波相速度的装置。

公开(公告)号：US3560653A

公开(公告)日：1971-02-02

申请号：US3560653D

申请日：1969-03-12

Applicant: ZENITH RADIO CORP

Inventor： DIAS FLEMING

IPC: H04B1/16 ,  H04H5/00

CPC classification number: H04B1/1653

Abstract: A receiver for stereophonic program signals wherein demodulation of a received stereophonic subcarrier signal is accomplished by inductorless demodulation circuitry suitable for integrated circuit construction. A sampled data-type filter, located between the receiver frequency modulation detector and integrated circuit stereo demodulator, extracts the pilot signal from the composite signal with a sufficiently high signal-to-noise ratio to permit derivation of a continuous-wave demodulation signal stages without the provision of further tuned circuitry therein.