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    Schaltungsanordnung zum Abstimmen von Hochfrequenzempfängern mit einer PLL-Schaltung
    1.
    发明公开
    Schaltungsanordnung zum Abstimmen von Hochfrequenzempfängern mit einer PLL-Schaltung 失效
    Schaltungsanordnung zum Abstimmen vonHochfrequenzempfängernmit einer PLL-Schaltung。

    公开(公告)号：EP0092657A2

    公开(公告)日：1983-11-02

    申请号：EP83101803.1

    申请日：1983-02-24

    申请人： Deutsche Thomson-Brandt GmbH

    发明人： Maier, Gerhard ,  Selz, Alfred

    IPC分类号： H03J5/02 ,  H03L7/10

    CPC分类号： H03L7/107 ,  H03J5/0272

    摘要： Schaltungsanordnung zum Abstimmen von Hochfrequenzempfängern mit einer PLL-Schaltung zur Erzeugung der Abstimmspannung. Das Filter im Gegenkopplungszweig des Operationsverstärkers, an dessen Ausgang die Abstimmspannung abgenommen wird, wird in Abhängigkeit von der eingestellten Abstimmspannung umgeschaltet. Dies geschieht mit Hilfe einer Dioden-Widerstandsanordnung, wodurch für die verschiedenen Abstimmspannungswerte die Gegenkopplung des Operationsverstärkers den verschiedenen Abstimmsteilheiten optimal angepasst ist.

    摘要翻译： 1.一种借助于锁相环电路来调谐高频接收器的电路装置，用于产生用于HF调谐电路（T）中的电容二极管的调谐电压（VT），以及一个切换时间的装置 作为调谐的函数的锁相环电路中的低通滤波器（R0，C0，C1）的常数，因此带宽，其特征在于，电阻器（R1）的一端连接到 调谐电压（VT），并且通过两个二极管（D11，D12）在另一端连接到低通滤波器（R0，C0，C1）的电阻器（R0）的末端，该端部与调谐电压 电压（VT），并且二极管（D11，D12）的阳极通过产生偏置电压（U1）的分压器（R11，R12）偏置，使得它们在调谐电压下导通 （VT），其小于偏置电压（U1），使得电阻器（R1）与低通滤波器（R0，C0，C1）的电阻器（R0）并联 ），当给予调谐电压（VT）的值低于偏置电压（U1）给出的值时，调谐电压（VT）和偏置电压（U1）分别为 源自相同的电压源（+ 33V）。

    Oscillator having a tunable resonant circuit
    2.
    发明公开
    Oscillator having a tunable resonant circuit 有权
    Oszillator mit einem abstimmbaren Schwingkreis

    公开(公告)号：EP1111768A2

    公开(公告)日：2001-06-27

    申请号：EP00124719.6

    申请日：2000-11-13

    申请人： DEUTSCHE THOMSON-BRANDT GMBH

    发明人： Selz, Alfred

    IPC分类号： H03B5/12

    CPC分类号： H03J5/244 ,  H03B5/08 ,  H03B2201/0208 ,  H03B2201/0258

    摘要： The oscillator having a tunable resonant circuit has a switch (SD) for expanding the tuning range, which is connected in series with two coils (L1a, L1b) jointly determining the oscillation frequency of the resonant circuit. A further coil (L2b), which is coupled to the resonant circuit in the region of the switch (SD), is used to supply a switching voltage (US) for the switch. In this arrangement, the other end of this third coil (L2b) is coupled to a reference potential (G), with a capacitor (C6), which acts as a short circuit for radio-frequency purposes, decoupling the switching voltage (US) from the reference potential (G). Since the switching voltage (US) is in this case coupled to an oscillator circuit node which is earthed for radio-frequency purposes, it is of no significance in this case which resistor is used to couple the switching voltage. This means that the resonant circuit is not resistively damped by the connection of the switching voltage.
    Coupled to the other end of the switching diode is a further component (L2a), preferably a fourth coil, which has the same inductance as the third coil (L2b), in order to dissipate the switching voltage. The first two coils are advantageously of the same size, so that this circuit coil jointly determining the oscillation frequency is earthed by the third coil exactly at its centre. This means that the quality factor and the oscillation properties of the resonant circuit are not adversely affected.
    Circuits of this type are used, in particular, in television sets to receive the lower and upper VHF bands.

    摘要翻译： 具有可调谐谐振电路的振荡器具有用于扩展调谐范围的开关（SD），该开关与两个线圈（L1a，L1b）串联连接确定谐振电路的振荡频率。 在开关（SD）的区域中耦合到谐振电路的另一个线圈（L2b）用于为开关提供开关电压（US）。 在这种布置中，该第三线圈（L2b）的另一端通过电容器（C6）与参考电位（G）耦合，电容器（C6）用作射频目的的短路，去耦合开关电压（US） 从参考电位（G）。 由于在这种情况下，开关电压（US）耦合到用于射频目的接地的振荡器电路节点，所以在这种情况下使用哪个电阻器来耦合开关电压是没有意义的。 这意味着谐振电路不会通过开关电压的连接阻抗。 耦合到开关二极管的另一端是为了耗散开关电压而具有与第三线圈（L2b）相同的电感的另一部件（L2a），优选地是第四线圈。 前两个线圈有利地具有相同的尺寸，使得共同确定振荡频率的该电路线圈由第三线圈正好在其中心处接地。 这意味着谐振电路的品质因数和振荡特性不会受到不利影响。 特别是在电视机中使用这种类型的电路来接收下部和上部VHF频带。

    Single conversion tuner
    3.
    发明公开
    Single conversion tuner 审中-公开
    调谐器Einzelkonversion

    公开(公告)号：EP1594221A1

    公开(公告)日：2005-11-09

    申请号：EP04010664.3

    申请日：2004-05-05

    申请人： DEUTSCHE THOMSON-BRANDT GMBH

    发明人： Armbruster, Veit ,  Selz, Alfred

    IPC分类号： H03D7/18 ,  H04N5/455

    CPC分类号： H04N5/4446 ,  H03J3/26 ,  H03J2200/14 ,  H04B1/26 ,  H04B1/406

    摘要： A single conversion tuner suitable for receiving RF signals having different requirements as to selectivity, linearity and image rejection is presented. Tuners of this kind are particularly useful for digital terrestrial as well as cable reception, where different modulation schemes require very high image rejection ratios on one hand and high linearity or pass band flatness on the other hand. The inventive tuner features a double-tuned tuneable filter in combination with an image reject mixer. The double-tuned filter provides excellent pass band flatness, while the image reject mixer provides a high intrinsic image rejection. The image rejection ratio of the combination of image reject mixer and tuneable filter is very high and fulfils the requirements of commonly used modulation schemes such as 8VSB, while the pass band flatness is compliant with the requirements for modulation schemes such as QAM.

    摘要翻译： 提出了适用于接收对于选择性，线性和镜像抑制具有不同要求的RF信号的单个转换调谐器。 这种调谐器对于数字地面和电缆接收特别有用，其中不同的调制方案一方面需要非常高的图像抑制比，另一方面要求高线性度或通带平坦度。 本发明的调谐器具有与图像拒绝混合器组合的双调谐可调滤波器。 双调谐滤波器提供优异的通带平坦度，而图像抑制混频器提供高内在的图像抑制。 图像抑制混频器和可调滤波器组合的图像抑制比非常高，满足了常用调制方案（如8VSB）的要求，而通带平坦度符合QAM等调制方案的要求。

    Oscillator having a tunable resonant circuit
    6.
    发明公开
    Oscillator having a tunable resonant circuit 有权
    具有可调谐谐振电路的振荡器

    公开(公告)号：EP1111768A3

    公开(公告)日：2002-01-23

    申请号：EP00124719.6

    申请日：2000-11-13

    申请人： DEUTSCHE THOMSON-BRANDT GMBH

    发明人： Selz, Alfred

    IPC分类号： H03B5/12 ,  H03J5/24

    CPC分类号： H03J5/244 ,  H03B5/08 ,  H03B2201/0208 ,  H03B2201/0258

    摘要： The oscillator having a tunable resonant circuit has a switch (SD) for expanding the tuning range, which is connected in series with two coils (L1a, L1b) jointly determining the oscillation frequency of the resonant circuit. A further coil (L2b), which is coupled to the resonant circuit in the region of the switch (SD), is used to supply a switching voltage (US) for the switch. In this arrangement, the other end of this third coil (L2b) is coupled to a reference potential (G), with a capacitor (C6), which acts as a short circuit for radio-frequency purposes, decoupling the switching voltage (US) from the reference potential (G). Since the switching voltage (US) is in this case coupled to an oscillator circuit node which is earthed for radio-frequency purposes, it is of no significance in this case which resistor is used to couple the switching voltage. This means that the resonant circuit is not resistively damped by the connection of the switching voltage. Coupled to the other end of the switching diode is a further component (L2a), preferably a fourth coil, which has the same inductance as the third coil (L2b), in order to dissipate the switching voltage. The first two coils are advantageously of the same size, so that this circuit coil jointly determining the oscillation frequency is earthed by the third coil exactly at its centre. This means that the quality factor and the oscillation properties of the resonant circuit are not adversely affected. Circuits of this type are used, in particular, in television sets to receive the lower and upper VHF bands.