Frequency control system for receiver with heterodyne preselector
    1.
    发明授权
    Frequency control system for receiver with heterodyne preselector 失效
    用于接收器的频率控制系统

    公开(公告)号:US3584305A

    公开(公告)日:1971-06-08

    申请号:US3584305D

    申请日:1968-09-19

    Applicant: CIT ALCATEL

    CPC classification number: H03D7/163 H03B21/02 H03B2201/0208 H03B2202/027

    Abstract: Receiver with a heterodyne preselector fed by a first local oscillator, oscillator, and a frequency converter having a manually controllable second local oscillator. In order to maintain the desired relation between the frequencies of the two local oscillators, the output signals therefrom are intermodulated and the frequency of the resulting signal maintained in a corresponding desired range of frequency by means of a circuit which, according to the value of the frequency of the resulting signal, (i) initiates a frequency sweep of the first local oscillator (ii) causes this frequency to be increased by a predetermined amount or (iii) causes this frequency to be decreased by a predetermined amount.

    Oscillator control circuit
    2.
    发明授权
    Oscillator control circuit 失效
    振荡器控制电路

    公开(公告)号:US3872396A

    公开(公告)日:1975-03-18

    申请号:US41335073

    申请日:1973-11-06

    Applicant: CIT ALCATEL

    CPC classification number: H03L7/081

    Abstract: Servo-control loop with an outside frequency affecting an oscillator for regulating by means of the voltage (VCO) formed by logic circuits operating in a wide band and comprising a means for adjusting the phase, giving a standard phase shift throughout the band.

    Abstract translation: 具有影响振荡器的外部频率的伺服控制回路,借助于在宽带中工作的逻辑电路形成的电压(VCO),并且包括用于调整相位的装置,从而给整个频带提供标准相移。

    4.
    发明专利
    未知

    公开(公告)号:FR1519740A

    公开(公告)日:1968-04-05

    申请号:FR95695

    申请日:1967-02-20

    Applicant: CIT ALCATEL

    Inventor: BASTIDE PAUL

    5.
    发明专利
    未知

    公开(公告)号:DK137030B

    公开(公告)日:1978-01-02

    申请号:DK589373

    申请日:1973-10-31

    Applicant: CIT ALCATEL

    Abstract: Servo-control loop with an outside frequency affecting an oscillator for regulating by means of the voltage (VCO) formed by logic circuits operating in a wide band and comprising a means for adjusting the phase, giving a standard phase shift throughout the band.

    6.
    发明专利
    未知

    公开(公告)号:DE2354357A1

    公开(公告)日:1974-05-22

    申请号:DE2354357

    申请日:1973-10-30

    Applicant: CIT ALCATEL

    Abstract: Servo-control loop with an outside frequency affecting an oscillator for regulating by means of the voltage (VCO) formed by logic circuits operating in a wide band and comprising a means for adjusting the phase, giving a standard phase shift throughout the band.

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