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公开(公告)号：US07317768B2
公开(公告)日：2008-01-08
申请号：US10485975
申请日：2002-06-07
IPC分类号： H03D3/00
CPC分类号： H03D3/007
摘要： The invention relates to a demodulator and also a demodulation method and enables a reliable demodulation even when the intermediate frequency range overlaps the range of the data frequencies of the signal. For this purpose, a rapidly oscillating output signal is generated from the in-phase signal and also the quadrature signal, the sign of which output signal varies in a manner dependent on the product of the signs of the in-phase signal and of the quadrature signal. Either an XOR gate or a multiplier stage may be used in order to generate an output signal of this type.
摘要翻译： 本发明涉及解调器和解调方法，并且即使当中间频率范围与信号的数据频率的范围重叠时也能够进行可靠的解调。 为此，从同相信号和正交信号产生快速振荡的输出信号，其输出信号的符号以取决于同相信号和正交信号的符号的乘积的方式变化 信号。 为了产生这种类型的输出信号，可以使用异或门或乘法器级。
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22.发明授权Frequency conversion circuit arrangement and mobile radio comprising said circuit arrangement 有权频率转换电路装置和包括所述电路装置的移动无线电设备公开(公告)号：US07030667B2
公开(公告)日：2006-04-18
申请号：US10940114
申请日：2004-09-14
申请人： Christian Grewing , André Hanke
发明人： Christian Grewing , André Hanke
摘要： A frequency conversion circuit arrangement is disclosed providing a complex output signal at its output. The circuit comprises two frequency mixers that are driven, on the one hand, by an input signal and, on the other hand, by a feedback signal. In this case, the feedback signal is the frequency-divided output signal and has been broken down into an in-phase component and a quadrature component. The frequency conversion circuit provides a signal at an output frequency in a manner independent of production tolerances and accurately in terms of frequency, said signal being in the form of an IQ signal and additionally being decoupled, in terms of frequency, from the input signal. The frequency conversion circuit is therefore particularly well suited to use in mobile radio transceivers.
摘要翻译： 公开了一种在其输出端提供复合输出信号的频率转换电路装置。 电路包括两个混频器，一方面由输入信号驱动，另一方面由反馈信号驱动。 在这种情况下，反馈信号是分频输出信号，并且已被分解为同相分量和正交分量。 频率转换电路以与制造公差无关并且在频率方面准确地以输出频率提供信号，所述信号为IQ信号的形式，并且另外根据频率从输入信号中分离。 因此，变频电路特别适用于移动无线电收发机。
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公开(公告)号：US06975100B2
公开(公告)日：2005-12-13
申请号：US10824712
申请日：2004-04-14
CPC分类号： H03K7/08 , H03K5/1565
摘要： A circuit arrangement for regulating the duty cycle of an electrical signal including a first input differential amplifier, to which an input signal is applied; a first current source for controlling the current through the first input differential amplifier; a second input differential amplifier, to which the same input signal is applied; a second current source for controlling the current through the second input differential amplifier; a device which generates a fluctuating voltage signal from output signals of the two input differential amplifiers; a buffer device, which converts the fluctuating voltage signal into a digital output signal; a capacitance and a device for charging and discharging the capacitance in time with the digital output signal. The voltage present at the capacitance is fed to the first and second current sources as control voltage and effects regulation of the two current sources in opposite senses.
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公开(公告)号：US07679216B2
公开(公告)日：2010-03-16
申请号：US11781138
申请日：2007-07-20
CPC分类号： G06F1/32 , Y10T307/406 , Y10T307/609 , Y10T307/653
摘要： A power control system is described that reuses current from segregated circuits of the mobile device. In some embodiments, the segregated circuits (or “sections”) can be “stacked” in series (with respect to the power supply) such that power is more efficiently used. The power can be more efficiently used by arranging a first section to reuse current that supplies power to a second section. A power control unit can be used to control regulators.
摘要翻译： 描述了从移动设备的分离电路重用电流的功率控制系统。 在一些实施例中，隔离电路（或“部分”）可以“串联”（相对于电源）“堆叠”，使得功率被更有效地使用。 通过布置第一部分以重新向第二部分供电的电流可以更有效地使用电力。 功率控制单元可用于控制调节器。
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公开(公告)号：US20090103654A1
公开(公告)日：2009-04-23
申请号：US11877455
申请日：2007-10-23
CPC分类号： H04L27/38 , H04B1/30 , H04L27/3845 , H04L27/3881
摘要： One embodiment relates to a low intermediate frequency (IF) receiver. The low-IF receiver includes an analog front end that is configured to receive a modulated IQ data signal and provide an in-phase signal and a quadrature signal, where the in-phase signal is phase shifted by approximately 90° relative to the quadrature signal. The low-IF receiver further includes a digital processing block, and a single path that provides only one of the in-phase signal and the quadrature signal to the digital processing block. Other receivers and methods are also disclosed.
摘要翻译： 一个实施例涉及一种低中频（IF）接收机。 低IF接收机包括模拟前端，其被配置为接收经调制的IQ数据信号并提供同相信号和正交信号，其中同相信号相对于正交信号相移大约90° 。 低中频接收机还包括数字处理块，以及将数字处理块仅提供同相信号和正交信号中的一个的单个路径。 还公开了其他接收器和方法。
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26.发明授权Direct frequency modulation system having an IQ mixer in the phase locked loop 失效在锁相环中具有IQ混频器的直接调频系统公开(公告)号：US07180385B2
公开(公告)日：2007-02-20
申请号：US10939587
申请日：2004-09-13
IPC分类号： H03C3/06
CPC分类号： H03C3/0983 , H03C3/0925 , H03C3/0933 , H03C3/40
摘要： A transmission arrangement includes a step-up frequency mixer that converts a modulation signal to a transmission frequency. The step-up frequency mixer is arranged within a phase locked loop that further comprises a frequency divider that is likewise supplied with the modulation data, combined with channel pre-selection data, for the purposes of compensation. This arrangement prevents low-frequency components of the modulation signal from being eliminated by the phase locked loop. In addition, noise components and undesirable interference frequency components that are produced in the mixer are suppressed by the phase locked loop.
摘要翻译： 传输装置包括将调制信号转换为传输频率的升压混频器。 升压型混频器被布置在锁相环内，该锁相环还包括分频器，该分频器同样被提供调制数据，与通道预选数据相结合，用于补偿。 这种布置防止了调制信号的低频分量被锁相环消除。 此外，在混频器中产生的噪声分量和不期望的干扰频率分量被锁相环抑制。
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27.发明授权Compensating method for a PLL circuit that functions according to the two-point principle, and PLL circuit provided with a compensating device 有权用于根据两点原理工作的PLL电路的补偿方法，以及配备有补偿装置的PLL电路公开(公告)号：US07154347B2
公开(公告)日：2006-12-26
申请号：US10490604
申请日：2002-07-24
IPC分类号： H03L7/00
CPC分类号： H03C3/0991 , H03C3/0925 , H03C3/0933 , H03C3/0941 , H03C3/095 , H03L7/0893 , H03L7/1976
摘要： A PLL circuit is tuned to a first frequency by using a first digital modulation signal and subsequently tuned to a second frequency by using a second digital modulation signal. A differential signal, that is a function of the change in voltage of a VCO control signal generated by the modulation signals, is compared with a comparison signal, that is characteristic of the analog modulation amplitude. Based on the comparison the analog modulation amplitude is changed to minimize or substantially eliminate a deviation between the signals.
摘要翻译： 通过使用第一数字调制信号将PLL电路调谐到第一频率，并且随后通过使用第二数字调制信号调谐到第二频率。 将由调制信号产生的VCO控制信号的电压变化的函数的差分信号与作为模拟调制幅度特性的比较信号进行比较。 基于比较，改变模拟调制幅度以最小化或基本消除信号之间的偏差。
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28.发明授权Two-point modulator comprising a PLL circuit and a simplified digital pre-filtering system 有权两点调制器包括一个PLL电路和一个简化的数字预滤波系统公开(公告)号：US07142063B2
公开(公告)日：2006-11-28
申请号：US10479788
申请日：2002-05-24
IPC分类号： H03L7/00
CPC分类号： H03C3/095 , H03C3/0925 , H03C3/0941
摘要： A two-point modulator includes a PLL circuit and a simplified digital pre-filtering system. The two-point modulator includes a first circuit path for impressing an analog modulation signal into a first point in the PLL circuit, and a second circuit path for impressing a digital modulation signal into a second point in the PLL circuit. The second circuit path actuates a frequency divider in the feedback path in the PLL circuit and contains a digital filter which has a square-wave pulse response.
摘要翻译： 两点调制器包括一个PLL电路和一个简化的数字预滤波系统。 两点调制器包括用于将模拟调制信号压入PLL电路中的第一点的第一电路路径和用于将数字调制信号压入PLL电路中的第二点的第二电路路径。 第二电路通路驱动PLL电路的反馈路径中的分频器，并包含具有方波脉冲响应的数字滤波器。
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公开(公告)号：US06972549B2
公开(公告)日：2005-12-06
申请号：US11041611
申请日：2005-01-24
申请人： Eckhard Brass , Christian Grewing , Jürgen Oehm
发明人： Eckhard Brass , Christian Grewing , Jürgen Oehm
CPC分类号： H03F3/345
摘要： A bandgap reference circuit is provided in which the conventional current loop with a current mirror for feeding a differential amplifier is replaced by a reference current that flows through a resistor connected to the bias input of the differential amplifier. In conjunction with a simpler construction and suitability for lower supply voltages, the circuit exhibits an improved supply voltage rejection PSRR over the prior art.
摘要翻译： 提供了带隙参考电路，其中具有用于馈送差分放大器的电流镜的常规电流回路被流过连接到差分放大器的偏置输入端的电阻器的参考电流代替。 结合更简单的结构和更低电源电压的适用性，该电路显示出比现有技术更好的电源电压抑制PSRR。
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30.发明申请Frequency-doubling circuit arrangement, and mobile radio having that circuit arrangement 有权倍频电路布置，以及具有该电路布置的移动无线电公开(公告)号：US20050090220A1
公开(公告)日：2005-04-28
申请号：US10940103
申请日：2004-09-14
申请人： Christian Grewing , Andre Hanke , Dietolf Seippel
发明人： Christian Grewing , Andre Hanke , Dietolf Seippel
CPC分类号： H04B1/30
摘要： One or more aspects of the present invention are directed to a frequency-doubling circuit arrangement that doubles the frequency of a signal applied to its input, and presents that doubled frequency signal at its output. A rectifier that rectifies the input signal as a function of a reference variable is provided for coupling the input and output. A regulator is used to supply the reference variable to a control input of the rectifier. A control loop is designed so that even-numbered higher harmonics in the output signal disappear or are greatly suppressed. Since the frequency-doubling circuit described has a low power consumption in conjunction with a smaller chip area, it is particularly suitable for installation in mobile radios for conditioning carrier frequencies and local oscillator frequencies.
摘要翻译： 本发明的一个或多个方面涉及加倍施加到其输入的信号的频率的倍频电路装置，并在其输出端呈现该倍频信号。 提供整流器作为参考变量的函数对输入信号进行整流，用于耦合输入和输出。 调节器用于将参考变量提供给整流器的控制输入端。 控制回路被设计成使得输出信号中偶数高次谐波消失或被大大抑制。 由于所描述的倍频电路结合较小的芯片面积具有低功耗，因此特别适用于安装在用于调节载波频率和本地振荡器频率的移动无线电中。
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