公开(公告)号：US20030067994A1

公开(公告)日：2003-04-10

申请号：US10267905

申请日：2002-10-09

申请人： Zarlink Semiconductor Limited

发明人： Peter Edward Chadwick

IPC分类号： H04L027/04 ,  H04L027/12 ,  H04L027/20

CPC分类号： H03F1/3282 ,  H03F1/0205 ,  H03F1/32 ,  H03F1/3247 ,  H03F2201/3233

摘要： A polar loop transmitter circuit arrangement includes a circuit input, a circuit output, a controllable signal source, a modulator connected between the signal source and the output, a first amplifier having its input connected to the circuit input, a second amplifier having its input connected to the circuit output, and a comparator. Each amplifier preferably includes respective amplitude detector and signal modifier portions connected in series between their respective inputs and outputs. An output of each of the amplifiers is connected to a respective input of the comparator, and an output of the comparator is connected to a control input of the modulator. The amplifiers may each be characterized by transfer functions that are generally logarithmic. Each amplifier's signal modifier portion may further include an analog-to-digital converter, a digital signal modifier, and a digital-to-analog converter. Additional signal mixer and/or phase comparison elements may also be incorporated into select embodiments of the subject polar loop transmitter technology.

摘要翻译： 极环回路发射器电路装置包括电路输入端，电路输出端，可控信号源，连接在信号源与输出端之间的调制器，第一放大器，其输入端连接到电路输入端;第二放大器，其输入端连接 到电路输出，以及一个比较器。 每个放大器优选地包括在它们各自的输入和输出之间串联连接的相应的振幅检测器和信号修正器部分。 每个放大器的输出端连接到比较器的相应输入端，比较器的输出端连接到调制器的控制输入端。 放大器的每个都可以通过通常为对数的传递函数来表征。 每个放大器的信号修改器部分还可以包括模数转换器，数字信号修改器和数模转换器。 附加的信号混合器和/或相位比较元件也可以并入目标极环发射机技术的选择实施例中。

公开(公告)号：US20030227331A1

公开(公告)日：2003-12-11

申请号：US10449746

申请日：2003-05-30

申请人： Zarlink Semiconductor Limited

发明人： Peter Edward Chadwick

IPC分类号： H03L007/00

CPC分类号： H03C3/095

摘要： A frequency modulation system is disclosed which includes a voltage-controlled oscillator (VCO) 43 and a phase detector 47 configured to receive an output signal from the VCO. The phase detector is arranged to output an error signal representing the phase difference between the signal from the VCO and a reference signal. The system also includes control means 62 arranged to monitor the error signal to derive an indication of the frequency deviation of the VCO, and, in accordance with this derivation, to maintain the frequency deviation of the VCO substantially constant.

摘要翻译： 公开了一种频率调制系统，其包括被配置为从VCO接收输出信号的压控振荡器（VCO）43和相位检测器47。 相位检测器被布置为输出表示来自VCO的信号与参考信号之间的相位差的误差信号。 该系统还包括控制装置62，其被配置为监视误差信号以导出VCO的频率偏差的指示，并且根据该推导，维持VCO的频率偏差基本上恒定。

公开(公告)号：US20030073419A1

公开(公告)日：2003-04-17

申请号：US10267904

申请日：2002-10-09

申请人： Zarlink Semiconductor Limited

发明人： Peter Edward Chadwick

IPC分类号： H04B001/04 ,  H04B017/00 ,  H03C001/62 ,  H01Q011/12

CPC分类号： H03G3/3036 ,  H03C5/00

摘要： A polar loop transmitter circuit arrangement comprises a circuit input, a circuit output, a controllable signal source, a modulator connected between the signal source and the circuit output, a first signal-amplitude-sensitive element having its input connected to the circuit input, a second signal-amplitude-sensitive element having its input connected to the circuit output, a comparator, and at least one controllable attenuator. An output of each of the signal-amplitude-sensitive elements is connected to a respective input of the comparator, and an output of the comparator is connected to a control input of the modulator. Another controllable attenuator may also be connected between the circuit output and an input of the second signal-amplitude-sensitive element. The signal-amplitude-sensitive elements may correspond to amplitude detectors in some embodiments of the technology, and to logarithmic amplifiers in other embodiments. Additional features for comparing the respective phases of the circuit input and the circuit output may be utilized to control the signal source.

摘要翻译： 极环回路发射器电路装置包括电路输入，电路输出，可控信号源，连接在信号源和电路输出之间的调制器，具有连接到电路输入的输入的第一信号幅度敏感元件， 其输入端连接到电路输出的第二信号幅度敏感元件，比较器和至少一个可控衰减器。 每个信号幅度敏感元件的输出连接到比较器的相应输入，比较器的输出端连接到调制器的控制输入。 另一可控衰减器也可以连接在电路输出端和第二信号幅度敏感元件的输入端之间。 信号幅度敏感元件可以对应于本技术的一些实施例中的幅度检测器，在其他实施例中可对应于对数放大器。 可以利用用于比较电路输入和电路输出的各个相位的附加特征来控制信号源。

公开(公告)号：US20020168950A1

公开(公告)日：2002-11-14

申请号：US10114429

申请日：2002-04-02

申请人： Zarlink Semiconductor Limited

发明人： Peter Edward Chadwick

IPC分类号： H04B001/00

CPC分类号： H03C3/0983 ,  H03C3/0908 ,  H03C3/0966 ,  H04B10/50

摘要： A polar loop transmitter circuit arrangement includes a circuit input, a circuit output and a controllable signal source. A modulator is coupled between the signal source and the output, whilst a first logarithmic amplifier is provided having its input coupled to the circuit input. A second logarithmic amplifier is also provided having its output coupled to the circuit output. An output of each logarithmic amplifier is coupled to a respective input of a comparator, and an output of the comparator is coupled to an input of the modulator. The logarithmic amplifiers can be successive detection logarithmic amplifiers, such amplifiers having an RF output which is amplitude limited and can be designed to have constant phase limited output.

摘要翻译： 极环发射机电路装置包括电路输入，电路输出和可控信号源。 调制器耦合在信号源和输出端之间，而第一对数放大器被提供，其输入耦合到电路输入端。 还提供了第二对数放大器，其输出耦合到电路输出。 每个对数放大器的输出耦合到比较器的相应输入端，比较器的输出端耦合到调制器的输入端。 对数放大器可以是连续的检测对数放大器，这种放大器具有RF输出，其幅度受到限制并且可被设计为具有恒定的相位限制输出。