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    Voltage-controlled oscillator with digital preset
    1.
    发明授权
    Voltage-controlled oscillator with digital preset 失效
    带数字预置的电压控制振荡器

    公开(公告)号：US3614665A

    公开(公告)日：1971-10-19

    申请号：US3614665D

    申请日：1970-04-06

    Applicant: AVCO CORP

    Inventor： WELLER CARROLL E ,  MCNAIR ROBERT J

    IPC: H03B1/00 ,  H03B5/12 ,  H03B5/18 ,  H03L7/187

    CPC classification number: H03L7/187 ,  H03B5/1203 ,  H03B5/1228 ,  H03B5/1243 ,  H03B5/1265 ,  H03B5/1805 ,  H03B2201/0208 ,  H03B2201/0266 ,  H03J2200/10

    Abstract: This is a voltage-controlled oscillator. The tank circuit of the oscillator comprises a plurality of capacitors, the capacitance magnitudes of which are related to each other in binary fashion. Also incorporated in this tank circuit is a voltage variable capacitor, to which a bias is applied for tuning purposes. By programmed switching one or more of the aforementioned capacitances are switched into the tank circuit, so as to bring the oscillator within the pull-in range of a phase lock loop. The elements of the oscillator are related to a coaxial line structure. The invention further provides a convenient mounting on which the tank circuit parameters are arranged. The various lumped capacitances in the tank circuit are switched in and out by PIN diodes.

    Variable capacitor of the locking type
    3.
    发明授权
    Variable capacitor of the locking type 失效
    锁定类型的可变电容器

    公开(公告)号：US3618135A

    公开(公告)日：1971-11-02

    申请号：US3618135D

    申请日：1970-02-06

    Applicant: AVCO CORP

    Inventor： WELLER CARROLL E

    IPC: H01P7/00 ,  H01P7/06 ,  F16B39/06 ,  F16B39/284

    CPC classification number: H01P7/00 ,  Y10S411/954

    Abstract: The invention here disclosed is a variably positioned capacitance or susceptance element of particular utility in tuning striplines and cavities excited in the TEM mode. It is characterized by a bushing having an expansible segmented fore portion which projects through an aperture in the wall of the device being tuned, together with a locking screw arranged to force the segments into the edges of said aperture, thereby to assure favorable electrical characteristics and a secure lock of the setting of capacitance or susceptance.

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