公开(公告)号：US06771711B2

公开(公告)日：2004-08-03

申请号：US10033134

申请日：2001-10-22

申请人： Christian Kranz ,  Volker Christ

发明人： Christian Kranz ,  Volker Christ

IPC分类号： H03C300

CPC分类号： H04L27/2017 ,  H03M1/745 ,  H04L25/03834

摘要： A digital GMSK filter for use for frequency modulation of a carrier signal in a GMSK transmission system is described. The GMSK filter uses a large number of individual current sources, whose current values are individually weighted. The current sources are driven via a control logic module using a shift register with a thermometer code, such that this results in a total current with a Gaussian characteristic, which is converted across a resistor to a voltage and drives a voltage controlled oscillator (VCO). The filter provides exact implementation of the sample values, virtually without any quantization error, and requires only a small chip area for its implementation.

摘要翻译： 描述了用于GMSK传输系统中的载波信号的频率调制的数字GMSK滤波器。 GMSK滤波器使用大量单独的电流源，其当前值被单独加权。 电流源通过使用具有温度计代码的移位寄存器的控制逻辑模块驱动，使得这导致具有高斯特性的总电流，其被转换成电阻器到电压并驱动压控振荡器（VCO） 。 滤波器提供了实际值的准确实现，实际上没有任何量化误差，并且仅需要小的芯片面积来实现。

公开(公告)号：US06452461B1

公开(公告)日：2002-09-17

申请号：US09904305

申请日：2001-07-11

申请人： Ching-Hsiang Su ,  Ching-Kuang Tzuang

发明人： Ching-Hsiang Su ,  Ching-Kuang Tzuang

IPC分类号： H03C300

CPC分类号： H03B5/36 ,  H04L27/12

摘要： A high-speed power-efficient coded M-ary Frequency-Shift Keying (M-ary FSK) modulator. The modulator includes a coding logic, which generates (M/2) Gray code signals in accordance with an (N−1) bits control signal; and (M/2) switching oscillators. Each switching oscillator includes: a composite crystal resonator with a first end and a second end; a first switch, which is controlled by Gray code signals, with one end connected to the first end of the composite crystal resonator, and the other end grounded via an equivalent negative resistance circuit; a second switch, which is controlled by serial data, with one end connected to the second end of the composite crystal resonator, and the other end grounded; and a capacitor, with one end connected to the second end of the composite crystal resonator, and the other end grounded. One of the (M/2) switching oscillators is activated by the control signal, and the frequency of the activated oscillator is switched by the serial data for achieving M-ary frequency shift.

摘要翻译： 高速功率有效的编码M频移键控（M-ary FSK）调制器。 调制器包括编码逻辑，其根据（N-1）位控制信号产生（M / 2）格雷码信号; 和（M / 2）开关振荡器。 每个开关振荡器包括：具有第一端和第二端的复合晶体谐振器; 第一开关由格雷码信号控制，一端连接到复合晶体谐振器的第一端，另一端通过等效负电阻电路接地; 第二开关，其由串行数据控制，一端连接到复合晶体谐振器的第二端，另一端接地; 以及电容器，其一端连接到复合晶体谐振器的第二端，另一端接地。 （M / 2）开关振荡器之一由控制信号激活，激活的振荡器的频率由串行数据切换以实现M频移。

公开(公告)号：US06246727B1

公开(公告)日：2001-06-12

申请号：US09109746

申请日：1998-07-06

申请人： Lennart Larsson ,  Rolf Folkesson ,  Björn Johansson

发明人： Lennart Larsson ,  Rolf Folkesson ,  Björn Johansson

IPC分类号： H03C300

CPC分类号： H03J7/16 ,  H03J1/0008

摘要： A method and a system for tuning a resonance module in e.g. a radio base station are disclosed. The resonance module has tuning means, a transmitter connection, and an antenna connection. First frequency input and output signals on the transmitter and antenna connection, respectively, are sensed and processed to tune the resonance module to a frequency of the input signal on the transmitter connection. The processing of the sensed input and output signals includes processing in a second frequency range. Prior art methods are improved by the invention through e.g. the use of a quadrature modulator to increase adjustment speed and overall applicability of the resonance module to be tuned.

摘要翻译： 一种谐振模块调谐方法和系统。 公开了一种无线基站。 谐振模块具有调谐装置，发射器连接和天线连接。 分别在发射器和天线连接上的第一频率输入和输出信号被感测和处理，以将谐振模块调谐到发射器连接上的输入信号的频率。 感测的输入和输出信号的处理包括在第二频率范围内的处理。 通过本发明通过例如改进现有技术的方法。 使用正交调制器来增加要调谐的谐振模块的调整速度和整体适用性。

公开(公告)号：US06225873B1

公开(公告)日：2001-05-01

申请号：US08566270

申请日：1995-12-01

申请人： John P. Hill

发明人： John P. Hill

IPC分类号： H03C300

CPC分类号： H03C3/16 ,  H03B5/1847 ,  H03B5/187 ,  H03B2201/017

摘要： The present invention teaches a system for selectably oscillating at a first or a second oscillating frequency. The system comprises an oscillator for providing an oscillating output. Moreover, the system comprises a switching device for selecting a first or a second impedance in response to a select signal having a voltage. Each of the first and second impedances is fixed independently of the select signal voltage such that the oscillating output oscillates at the first oscillating frequency when the first impedance is provided and oscillates at the second oscillating frequency when the second impedance is provided.

摘要翻译： 本发明教导了一种用于以第一或第二振荡频率可选地振荡的系统。 该系统包括用于提供振荡输出的振荡器。 此外，该系统包括用于响应于具有电压的选择信号选择第一或第二阻抗的开关装置。 第一和第二阻抗中的每一个都是独立于选择信号电压固定的，使得当提供第一阻抗时，振荡输出以第一振荡频率振荡，并且当提供第二阻抗时以第二振荡频率振荡。

公开(公告)号：US06178312B1

公开(公告)日：2001-01-23

申请号：US09232453

申请日：1999-01-15

申请人： David Paul Nelson

发明人： David Paul Nelson

IPC分类号： H03C300

CPC分类号： H04B1/40 ,  H04B1/52

摘要： Frequency synthesizers of a radio transceiver are automatically tuned so that its transmit and receive frequencies correspond to whichever upper band and lower band filters the radio transceiver has been connected by the user. A capacitive electrical impedance interface is coupled to filter circuitry of an upper band filter section, while an inductive electrical impedance interface is coupled to filter circuitry of the lower based filter section. A voltage reference circuit is coupled to one of the transmit port and the receive port of the transceiver. A controller is operative to automatically tune the transceiver to transmit in one of the upper and lower frequency bands, and to receive on the other frequency band, in accordance with the voltage level generated by the voltage reference circuit.

摘要翻译： 无线电收发器的频率合成器被自动调谐，使得其发射和接收频率对应于无线电收发器已由用户连接的较高频带和较低频带滤波器。 电容性电阻抗接口耦合到上带滤波器部分的滤波器电路，而感性电阻抗接口耦合到基于滤波器部分的滤波器部分的滤波器电路。 电压参考电路耦合到收发器的发送端口和接收端口之一。 控制器可操作以自动调谐收发器以在上和下频带中的一个频带进行发送，并根据由电压参考电路产生的电压电平在另一个频带上接收。

公开(公告)号：US06809607B2

公开(公告)日：2004-10-26

申请号：US10100618

申请日：2002-03-18

申请人： Hiroyuki Nagasaka

发明人： Hiroyuki Nagasaka

IPC分类号： H03C300

CPC分类号： H04L27/368 ,  H03C3/406 ,  H03D7/168

摘要： A non-linear distortion compensation circuit and method automatically sets to an optimal value a phase shift of a variable phase shifter and an attenuation of an attenuator according to a transmission frequency, in a non-linear distortion extractor for extracting a non-linear distortion component generated during non-linear high-power amplification. A variable phase shifter shifts adjusts a phase of a signal determined by quadrature modulating the baseband signal. A high-power amplifier non-linearly high-power amplifies the quadrature-modulated signal. An attenuator attenuates the amplified signal by a gain equal to that of the high-power amplifier. A subtracter extracts non-linear distortion generated during the non-linear high-power amplification by subtracting the phase-shifted quadrature-modulated signal from an output of the attenuator. A control circuit automatically adjusts a phase shiftof the variable phase shifter and an attenuation of the attenuator according to a transmission frequency.

摘要翻译： 非线性失真补偿电路和方法在用于提取非线性失真分量的非线性失真提取器中根据传输频率将可变移相器的相移和衰减器的衰减自动设置为最佳值 在非线性大功率放大期间产生。 可变移相器移位调整通过正交调制基带信号确定的信号的相位。 大功率放大器非线性高功率放大正交调制信号。 衰减器通过与大功率放大器的增益相等的增益来衰减放大的信号。 减法器通过从衰减器的输出中减去相移的正交调制信号来提取在非线性高功率放大期间产生的非线性失真。 控制电路根据传输频率自动调整可变移相器的相移和衰减器的衰减。

公开(公告)号：US06774740B1

公开(公告)日：2004-08-10

申请号：US10420952

申请日：2003-04-21

申请人： John Groe

发明人： John Groe

IPC分类号： H03C300

CPC分类号： H03C3/0958 ,  H03C3/0925 ,  H03C3/0933 ,  H03C3/0941 ,  H04L27/2042

摘要： System for highly linear phase modulation. Apparatus is provided for linear phase modulation utilizing a phase-locked loop (PLL). The apparatus includes a PLL utilizing fractional N synthesis to realize a non-integer divide value. A two-port voltage-controlled oscillator includes a first port controlled by the phase-locked loop and a second port accessed for direct modulation. A second input to the fractional-N phase-locked loop is provided to remove the modulation introduced at the second port. Lastly, a calibration loop is provided wherein a frequency offset applied at the second port is adjusted until it cancels the effects of a known frequency offset introduced to the fractional-N phase-locked loop.

摘要翻译： 高线性相位调制系统。 提供了利用锁相环（PLL）进行线性相位调制的装置。 该装置包括利用分数N合成以实现非整数除法值的PLL。 双端口压控振荡器包括由锁相环控制的第一端口和用于直接调制的第二端口。 提供分数N锁相环的第二输入以去除在第二端口引入的调制。 最后，提供校准环路，其中调整在第二端口处施加的频率偏移，直到它消除引入到分数N锁相环路的已知频率偏移的影响。

公开(公告)号：US06768390B1

公开(公告)日：2004-07-27

申请号：US10405572

申请日：2003-04-02

申请人： Joel P. Dunsmore ,  Berry Carone ,  Stephen T. Sparks

发明人： Joel P. Dunsmore ,  Berry Carone ,  Stephen T. Sparks

IPC分类号： H03C300

CPC分类号： H03C3/403

摘要： Modulated differential (balanced) drive signals are created where, at least one of the signals can be controlled in phase relative to the other, and both of which could be controlled in amplitude and both of which have the same modulation envelope. In one embodiment, a coherent signal is generated in a first electronic signal generator (ESG) and applied to a second ESG. The coherent signal replaces the normal input signal of the second ESG and the I and Q inputs of the second ESG control the amplitude and phase of the output signal. This output signal is applied to a third ESG replacing the normal input signal to the vector modulator. The vector modulator is controlled by the same I and Q input as is the first ESG, thereby producing an output signal which has the same modulation envelope as the output signal from the first

摘要翻译： 产生调制的差分（平衡）驱动信号，其中至少一个信号可以相对于另一个相位进行相位控制，并且这两个信号可以以幅度进行控制，并且两者都具有相同的调制包络。 在一个实施例中，在第一电子信号发生器（ESG）中产生相干信号并施加到第二ESG。 相干信号代替第二ESG的正常输入信号，第二ESG的I和Q输入控制输出信号的幅度和相位。 该输出信号被施加到替换向量调制器的正常输入信号的第三ESG。 矢量调制器由与第一ESG相同的I和Q输入控制，从而产生具有与来自第一ESG的输出信号相同的调制包络的输出信号

公开(公告)号：US06727772B2

公开(公告)日：2004-04-27

申请号：US10135836

申请日：2002-05-01

申请人： Vladimir Kravtsov

发明人： Vladimir Kravtsov

IPC分类号： H03C300

CPC分类号： H04L27/3872 ,  H04L2025/0349 ,  H04L2027/003 ,  H04L2027/0057 ,  H04L2027/0067

摘要： In some embodiments of the present invention, there is a system and method of synchronizing a QAM demodulator by determining a phase offset error value between an actual phase shift of a received symbol and an estimated phase shift value.

摘要翻译： 在本发明的一些实施例中，存在通过确定接收符号的实际相移与估计相移值之间的相位偏移误差值来同步QAM解调器的系统和方法。

公开(公告)号：US06727771B2

公开(公告)日：2004-04-27

申请号：US09972152

申请日：2001-10-09

申请人： Tsuyoshi Moribe ,  Kazuyoshi Arimura ,  Susumu Kato

发明人： Tsuyoshi Moribe ,  Kazuyoshi Arimura ,  Susumu Kato

IPC分类号： H03C300

CPC分类号： H03C3/40

摘要： A semiconductor integrated circuit device includes an orthogonal modulator that maintains carrier leak characteristics regardless of attenuation of an output signal level. The orthogonal modulator includes a phase shifter circuit and generates a modulation signal. An auto gain controller amplifies the modulation signal to generate an amplified modulation signal. A gain adjusting circuit adjusts a gain of the phase shifter circuit in accordance with a control signal.

摘要翻译： 半导体集成电路器件包括正交调制器，其保持载波泄漏特性，而与输出信号电平的衰减无关。 正交调制器包括移相器电路并产生调制信号。 自动增益控制器放大调制信号以产生放大的调制信号。 增益调整电路根据控制信号调整移相器电路的增益。