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    Digital hybrid load pull system
    28.
    发明授权
    Digital hybrid load pull system 有权

    公开(公告)号：US11863163B1

    公开(公告)日：2024-01-02

    申请号：US16838786

    申请日：2020-04-02

    Applicant: Christos Tsironis

    Inventor： Christos Tsironis

    IPC: H03J3/28 ,  H01P1/38 ,  H03H11/28

    CPC classification number: H03J3/28 ,  H01P1/38 ,  H03H11/28

    Abstract: A digital high-speed hybrid load pull test system comprises a slide screw automatic passive tuner, a digital active forward injection loop in a closed loop transmission configuration, calibration and tuning algorithms. The forward active injection loop comprises at least one adjustable coupler, a digital electronic tuner and feedback power amplifier; the passive tuner comprises one or more metallic tuning probes, used to create passive reflection factors. Small signal calibration of the passive and active tuners create a global calibration data base, used to pre-tune in the area of the target impedance and final high power (nonlinear) tuning employs a in-situ signal power wave search and measurement for digital impedances around the small signal pattern. The system provides for high speed low injected power tuning with maximum reflection factor at DUT reference plane reaching unity.

    Band switchable type tuning circuit of television signal
    29.
    发明申请
    Band switchable type tuning circuit of television signal 失效
    频带可切换式电视信号调谐电路

    公开(公告)号：US20050113051A1

    公开(公告)日：2005-05-26

    申请号：US10991072

    申请日：2004-11-17

    Applicant: Masaki Yamamoto

    Inventor： Masaki Yamamoto

    IPC: H03J3/18 ,  H03J3/28 ,  H03J5/24 ,  H04B1/18 ,  H04N5/44

    CPC classification number: H04N5/4446 ,  H03J3/185 ,  H03J5/244

    Abstract: A band switchable type tuning circuit has first switch mean interposed between a power supply Vcc and an anode of a switch diode, a first resistor whose one end is connected to a cathode of the switch diode, second switch means interposed between the other end of the first resistor and a ground, a second resistor connected between the power supply Vcc and a connection point of the first resistor and the second switch means, and the third resistor connected between the ground and a connection point of the first switch means and the anode of the switch diode. The first switch means and the second switch means are turned on or off together by means of a band switching voltage.

    Abstract translation: 频带切换型调谐电路具有介于电源Vcc和开关二极管的阳极之间的第一开关平面，其一端连接到开关二极管的阴极的第一电阻器，插入在开关二极管的另一端之间的第二开关装置 第一电阻器和地，连接在电源Vcc与第一电阻器和第二开关装置的连接点之间的第二电阻器，以及连接在地与第一开关装置和阳极的连接点之间的第三电阻器 开关二极管。 第一开关装置和第二开关装置通过带开关电压一起接通或断开。

    Method and apparatus for tuning and aligning an FM receiver
    30.
    发明授权
    Method and apparatus for tuning and aligning an FM receiver 失效
    用于调谐和对准FM接收机的方法和装置

    公开(公告)号：US5428829A

    公开(公告)日：1995-06-27

    申请号：US952554

    申请日：1992-09-28

    Applicant: David W. Osburn ,  John R. Pacourek ,  Michael J. Easterwood ,  Stephen L. Inman ,  Richard A. Kennedy

    Inventor： David W. Osburn ,  John R. Pacourek ,  Michael J. Easterwood ,  Stephen L. Inman ,  Richard A. Kennedy

    IPC: H03J3/28 ,  H04B1/16

    CPC classification number: H03J3/28 ,  H03D2200/0047

    Abstract: A method for tuning and aligning an electronically tuned FM broadcast receiver is described. The system described compensates for the mismatch of component values between the antenna and RF amplifier tuned circuits, and the IF offset between the local oscillator frequency and the center frequencies of the antenna and RF resonant circuits by developing independent tuning signals for the circuits. The system also provides temperature compensation, and can be aligned without mechanically adjusting inductors and/or capacitors in the tuned circuits.

    Abstract translation: 描述了一种用于调谐和对准电子调谐的FM广播接收机的方法。 所描述的系统通过开发用于电路的独立调谐信号来补偿天线和RF放大器调谐电路之间的分量值的不匹配以及本地振荡器频率与天线和RF谐振电路的中心频率之间的IF偏移。 该系统还提供温度补偿，可在不调整调谐电路中的机械调节电感和/或电容的情况下对齐。

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