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公开(公告)号：US5483694A
公开(公告)日：1996-01-09
申请号：US164127
申请日：1993-12-08
CPC分类号： H03G3/3052 , H04B1/109
摘要： In a radio receiver with an input circuit which can be supplied with received signals, with a mixer for deriving an IF signal, and with an IF filter, the passband range corresponds to a usable signal range of the received signal, the received signals are amplitude-modified with an auxiliary signal for detecting intermodulation, in the course of which sidebands are generated outside of the useful signal range. The amplitudes of at least one sideband generated by modulation with the auxiliary signal and of the received carrier are compared in the IF signal. In case of deviations from a ratio based on the modulation factor during modulation with the auxiliary signal, a signal indicating the presence of intermodulation is derived.
摘要翻译： 在具有可以提供接收信号的输入电路的无线电接收机中，利用用于导出IF信号的混频器和IF滤波器，通带范围对应于接收信号的可用信号范围，接收信号是振幅 用用于检测互调的辅助信号进行修改，在有用信号范围之外的边带生成的过程中。 在IF信号中比较通过辅助信号和接收载波的调制产生的至少一个边带的振幅。 在与辅助信号调制期间基于调制因子的比率偏离的情况下，导出指示互调的存在的信号。
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公开(公告)号：US4672333A
公开(公告)日：1987-06-09
申请号：US786941
申请日：1985-10-11
申请人： Stefan Bartels
发明人： Stefan Bartels
IPC分类号： H01P1/39
CPC分类号： H01P1/39
摘要： A waveguide circulator includes a resonator body which is separated from a waveguide side by a dielectric spacer disc. The spacer disc has an interface turned toward the waveguide side in which defined electromagnetic boundary conditions are to prevail. The thickness of the spacer disc and the dielectric constant of the disc material are matched so that the disc thickness equals a quarter wavelength, referred to a wave propagating in the disc perpendicular to the waveguide side.
摘要翻译： 波导环行器包括谐振器体，该谐振器主体通过介质隔离盘与波导侧分离。 间隔盘具有朝着波导侧转变的界面，其中以电磁边界条件为准。 间隔盘的厚度和盘材料的介电常数匹配，使得盘厚度等于四分之一波长，这是指垂直于波导侧的光盘中传播的波。
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公开(公告)号：US5561716A
公开(公告)日：1996-10-01
申请号：US343385
申请日：1994-11-22
申请人： Jurgen Kasser , Stefan Bartels
发明人： Jurgen Kasser , Stefan Bartels
CPC分类号： H04S1/00 , H03D1/2209
摘要： In a demodulator for a stereo signal transmitted by amplitude and phase modulation of a carrier, a phase signal and a quantity signal are formed. By multiplication of the quantity signal with the tangent of the phase signal reduced by a value to be preset, a difference signal is formed. The value to be preset is generated in such a way as to minimize the direct portion of the difference signal.
摘要翻译： 在通过载波的幅度和相位调制发送的用于立体声信号的解调器中，形成相位信号和量信号。 通过将量信号与相位信号的切线相乘而减少预设的值，形成差分信号。 产生要预设的值，以使差分信号的直接部分最小化。
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4.发明授权Radio receiver for mobile reception with sampling rate oscillator frequency being an integer-number multiple of reference oscillation frequency 失效用于移动接收的无线电接收机，采样率振荡器频率是参考振荡频率的整数倍
公开(公告)号：US5430890A
公开(公告)日：1995-07-04
申请号：US979610
申请日：1992-11-20
CPC分类号： H04B1/0007 , H03J1/005 , H04B1/0003 , H04B1/0039 , H04B1/006 , H04B1/26
摘要： Digital tuning of a locally generated frequency supplied to a frequency converting mixer, a mobile radio receiver is provided with great economy of components by utilizing the sampling rate oscillator for an analog-to-digital converter provided at the output of an analog intermediate frequency amplifier of the receiver as the source of the difference frequency for a phase locked loop (PLL) for control of the phase of a local oscillator for the mixer or mixers. All frequencies used to supply local oscillations to mixers, as well as the operating frequency of the phase locked loop are integer number multiples of the sampling rate pulse generator. Some division stages have fixed dividers and others have divisors selectable by a tuning processor and in some of the divisor connections it is useful to interpose a fixed or selectable-factor multiplier. A sampling rate of 42.75 MHz is recommended and an intermediate frequency amplifier frequency which is a rational number multiple of 57 kHZ, preferably 10.6875 MHz are similarly recommended.
摘要翻译： 提供给频率转换混频器的本地产生的频率的数字调谐，移动无线电接收机通过利用提供在模拟中频放大器的输出端的模数转换器的模拟 - 数字转换器的采样率振荡器，为组件提供了极大的经济性 接收机作为用于混频器或混频器的本地振荡器的相位控制的锁相环（PLL）的差频源。 用于向混频器提供本地振荡的所有频率以及锁相环的工作频率都是采样率脉冲发生器的整数倍数。 一些分割阶段具有固定的分频器，而其他分频器具有可由调谐处理器选择的除数，并且在一些除数连接中，插入固定或可选因子乘数是有用的。 建议采样率为42.75 MHz，并推荐使用频率为57 kHZ，最好为10.6875 MHz的有效数倍的中频放大器频率。
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公开(公告)号：US5537448A
公开(公告)日：1996-07-16
申请号：US205315
申请日：1994-03-02
申请人： Detlef Schwarz , Stefan Bartels
发明人： Detlef Schwarz , Stefan Bartels
CPC分类号： H03L7/107
摘要： An improved Phase-Locked Loop (PLL) radio receiver circuit includes a phase detector, either an active loop filter or a set of parallel, alternately selectable loop filters, and a Voltage-Controlled Oscillator (VCO) whose input is connected to the output of the loop filter. The output of the VCO is fed to frequency divider. The output of the frequency divider and a reference frequency signal form the inputs to the phase detector/comparator. Toggling among the loop filters occurs such that the loop limit frequency, defined by a loop amplification of 1, is altered by this toggling without significantly changing the gradient of the amplification to the frequency, in a frequency range which includes the limit frequency.
摘要翻译： 改进的锁相环（PLL）无线电接收器电路包括相位检测器，有源环路滤波器或一组并行交替可选择的环路滤波器，以及一个电压控制振荡器（VCO），其输入端连接到 环路滤波器。 VCO的输出馈送到分频器。 分频器的输出和参考频率信号形成相位检测器/比较器的输入。 在环路滤波器之间进行切换，使得通过这种切换来改变由环路放大1定义的环路限制频率，而不会在包括极限频率的频率范围内将放大梯度显着地改变为频率。
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公开(公告)号：US5339455A
公开(公告)日：1994-08-16
申请号：US21029
申请日：1993-02-23
申请人： Lothar Vogt , Stefan Bartels , Rainer Arnold , Detlef Schwarz
发明人： Lothar Vogt , Stefan Bartels , Rainer Arnold , Detlef Schwarz
CPC分类号： H03G5/24 , H04B1/1027 , H04B2001/1054
摘要： A mobile radio receiver, for example, a car radio, needs a circuit to detect and suppress adjacent-channel interference. This can be done by using bandpass filters (14) of differing bandwidth. The present invention dynamically adjusts bandwidth to an optimum value by continuously comparing (13) a first signal level, upstream of the bandpass filter, to a second signal level, downstream of the bandpass filter, to derive a difference value representative of adjacent-channel interference, then uses an electronically controlled selector switch (6) to select a particular filter (14.sub.N) whose bandwidth is sufficiently narrow to cut out the interfering broadcast signal. A table associating each magnitude range of interference with a particular filter bandwidth assures that bandwidth is broadened as interference diminishes, thereby assuring sufficient reception signal strength.
摘要翻译： 诸如汽车无线电的移动无线电接收机需要电路来检测和抑制相邻信道干扰。 这可以通过使用不同带宽的带通滤波器（14）来完成。 本发明通过将带通滤波器的上游的第一信号电平（13）与带通滤波器的下游的第二信号电平连续地进行比较，将带宽动态地调整为最佳值，以导出表示相邻信道干扰的差值 ，然后使用电子控制的选择器开关（6）来选择其带宽足够窄的特定滤波器（14N）以切断干扰广播信号。 将每个幅度范围的干扰与特定滤波器带宽相关联的表格确保了随着干扰减小而使带宽变宽，从而确保足够的接收信号强度。
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