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    OPTOELECTRONIC OSCILLATOR WITH TUNABLE FILTER
    1.
    发明申请
    OPTOELECTRONIC OSCILLATOR WITH TUNABLE FILTER 审中-公开

    公开(公告)号：US20180248518A1

    公开(公告)日：2018-08-30

    申请号：US15752797

    申请日：2016-08-19

    申请人： NANOWAVE TECHNOLOGIES INC.

    发明人： Charles William Tremlett NICHOLLS

    IPC分类号： H03B17/00 ,  H03H9/64 ,  H03J3/28 ,  G02F1/225

    CPC分类号： H03B17/00 ,  G01S7/292 ,  G01S13/524 ,  G02F1/2252 ,  G02F2/02 ,  G02F2001/212 ,  G02F2201/205 ,  H01P7/06 ,  H01P7/10 ,  H03B2200/0044 ,  H03B2200/0048 ,  H03B2200/009 ,  H03H9/6406 ,  H03J3/28

    摘要： An optoelectronic oscillator (OEO) is disclosed comprising an electronically tunable filter for transposing narrow pass band characteristics of a surface acoustic wave (SAW) filter to a microwave frequency to provide mode selection in the OEO. An OEO is disclosed comprising a set of optical domain components, a downconverter in communication with an output of the optical domain components, and a set of radio frequency (RF) domain components in communication with an output of the downconverter. The set of RF domain components comprises a tunable filter operating at a filter center frequency and having an output coupled to the set of optical domain components for communicating a mode selection result. The tunable filter including a tuner; and a sub-filter. The sub-filter operating at a fixed center frequency to provide mode selection and adjacent mode suppression with respect to the tunable filter center frequency. The sub-filter center frequency being lower than the tunable filter center frequency, and a ratio of the tunable filter center frequency to a bandwidth of the sub-filter being at least 1000:1.

    Semiconductor device and signal processing method thereof
    2.
    发明授权
    Semiconductor device and signal processing method thereof 有权
    半导体器件及其信号处理方法

    公开(公告)号：US09036093B2

    公开(公告)日：2015-05-19

    申请号：US14272316

    申请日：2014-05-07

    申请人： Renesas Mobile Corporation

    发明人： Yoshihiko Hotta ,  Seiichi Saito ,  Kazushige Yamagishi

    IPC分类号： H04N5/50 ,  H04N5/46 ,  H04B1/16 ,  H04N21/414 ,  H04N21/426 ,  H04N21/438 ,  H04N21/442 ,  H04H40/27 ,  H03J3/28

    CPC分类号： H04H40/18 ,  H03J3/28 ,  H04B1/1638 ,  H04H40/27 ,  H04N5/50 ,  H04N21/41422 ,  H04N21/4263 ,  H04N21/4383 ,  H04N21/44209

    摘要： A semiconductor device includes a one-segment tuner I/F that is connected to a one-segment tuner, a tuner I/F that is connected to a digital terrestrial tuner, a decoder that selectively decodes a first broadcast signal supplied from the one-segment tuner I/F and a second broadcast signal supplied from the tuner I/F, a general purpose processor that is provided separately from the decoder and decodes the first broadcast signal, and a switch unit that, based on signal intensity of the second broadcast wave, switches the decoding by the decoder between the first broadcast signal and the second broadcast signal while the general purpose processor is decoding the first broadcast signal. The one-segment tuner I/F, the tuner I/F, the decoder, the general purpose processor, and the switch unit are integrated on one chip.

    摘要翻译： 半导体器件包括连接到单段调谐器的单段调谐器I / F，连接到数字地面调谐器的调谐器I / F，选择性地解码从单频段调谐器提供的第一广播信号的解码器， 段调谐器I / F和从调谐器I / F提供的第二广播信号，与解码器分开设置并对第一广播信号进行解码的通用处理器，以及基于第二广播的信号强度的开关单元 在通用处理器对第一广播信号进行解码的同时，在第一广播信号和第二广播信号之间切换解码器的解码。 单段调谐器I / F，调谐器I / F，解码器，通用处理器和开关单元集成在一个芯片上。

    FM radio receiver
    4.
    发明授权
    FM radio receiver 有权
    FM收音机

    公开(公告)号：US06178315B1

    公开(公告)日：2001-01-23

    申请号：US09195525

    申请日：1998-11-19

    申请人： Mohammad-Reza Sheikh-Movahhed ,  Yukio Suzuki

    发明人： Mohammad-Reza Sheikh-Movahhed ,  Yukio Suzuki

    IPC分类号： H04B118

    CPC分类号： H03J3/28 ,  H04B1/18 ,  H04B1/28

    摘要： An FM radio receiver comprises a radio frequency tuning circuit for selecting a frequency modulated signal from an antenna and a local oscillator tuning circuit for tuning to an oscillating signal so as to convert the frequency modulated signal to an intermediate frequency. In the radio frequency tuning circuit, a capacitance variable ratio is set so as to be capable of receiving continuously the frequencies of both a first FM receiving band used in Japan and a second FM receiving band used in the US and Europe. The local oscillator tuning circuit is so constructed that an inductance value and a capacitance variable ratio can be switched so that the receiver is set to lower heterodyne for reception in Japan or upper heterodyne for reception in the US or Europe. As a result, a single receiver design can be configured for reception of FM radio broadcasting in either Japan or the US or Europe using a common front-end circuit, without increasing the number of components.

    摘要翻译： FM无线电接收机包括用于从天线选择频率调制信号的射频调谐电路和用于调谐到振荡信号的本地振荡器调谐电路，以将调频信号转换成中频。 在无线电频率调谐电路中，电容变化率被设定为能够连续地接收在日本使用的第一FM接收频带和在美国和欧洲使用的第二FM接收频带两者的频率。 本地振荡器调谐电路的结构使得可以切换电感值和电容可变比，使得接收机被设置为在日本或美国或欧洲的接收时间较短的外差以接收高接收。 因此，单个接收机设计可以配置为在日本或美国或欧洲使用公共前端电路接收FM无线电广播，而不增加组件的数量。

    Electronic tuning circuit for AM receiver which is easy to effect tracking adjustment
    5.
    发明授权
    Electronic tuning circuit for AM receiver which is easy to effect tracking adjustment 失效
    用于AM接收机的电子调谐电路，易于进行跟踪调整

    公开(公告)号：US4837852A

    公开(公告)日：1989-06-06

    申请号：US874067

    申请日：1986-06-13

    申请人： Noboru Takada ,  Hajime Yokoyama

    发明人： Noboru Takada ,  Hajime Yokoyama

    IPC分类号： H03J3/28 ,  H03J5/02

    CPC分类号： H03J3/28 ,  H03J5/0272

    摘要： An electronic tuning circuit for AM receiver is disclosed which is so designed that tracking errors are minimized by increasing the accuracy of constants for tuning coils, oscillation coils and capacitance elements incorporated in an antenna tuning circuit, a high-frequency amplifier circuit and a local oscillator circuit which constitute the electronic tuning circuit. After the electronic tuning circuit has been mounted in place, tracking adjustment is effected at one point of the receiving frequency band, or alternatively no such adjustment is required.

    摘要翻译： 公开了一种用于AM接收机的电子调谐电路，其设计为通过增加并入天线调谐电路，高频放大器电路和本地振荡器中的调谐线圈，振荡线圈和电容元件的常数的精度来最小化跟踪误差 电路构成电子调谐电路。 在电子调谐电路已经安装到位之后，在接收频带的一个点进行跟踪调整，或者不需要这样的调整。