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公开(公告)号：JP2000068748A
公开(公告)日：2000-03-03
申请号：JP22840199
申请日：1999-08-12
Applicant: ANALOG DEVICES INC
Inventor： ATKINSON SIMON
Abstract: PROBLEM TO BE SOLVED: To reduce interference between a local oscillation signal and an RF (radio frequency) signal. SOLUTION: This circuit includes two mixers 32, 36 in an orthogonal relation, a phase shifting unit 50 and a local oscillator. The two mixers 32 and 36 are connected with the input port 30 of a radio frequency signal to mix a radio frequency inputted signal to convert into a low frequency. The unit 50 is connected with at least one of the mixers 32 and 36 to phase-shift the local oscillation signal. The local oscillator is constituted of a phase-locked loop including frequency dividers 40 and 44. The output signal of a first voltage controlled oscillator 38 is frequency-multiplied to be a non-integer value N/M-fold by this loop to be a local oscillation signal. Since the frequency of the oscillator 38 is the non-integer multiple of RF, interference from RF is reduced.
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公开(公告)号：AU1161002A
公开(公告)日：2002-04-22
申请号：AU1161002
申请日：2001-10-10
Applicant: ANALOG DEVICES INC
Inventor： MONTALVO ANTONIO J , ATKINSON SIMON
Abstract: Phase-locked loop methods and structures are provided for generating modulated communication signals with nonconstant envelopes. These methods and structures realize the improved communication performance of nonconstant-envelope modulations with the upconversion advantages of phase-locked loops. The structures include transmitters in which a phase-locked loop is augmented with first and second feedforward paths that substantially restore phase and amplitude information to a transmit signal that is generated by a voltage-controlled oscillator of the phase-locked loop. The first feedforward path is configured to realize a path transfer function of s/Kv wherein the voltage-controlled oscillator has a transfer function of Kv/s. The second feedforward path extracts an envelope-correction signal from the modulated intermediate-frequency signal and a variable-gain output amplifier amplifies the transmit signal with a gain that responds to the envelope-correction signal.
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公开(公告)号：GB2340687A
公开(公告)日：2000-02-23
申请号：GB9918941
申请日：1999-08-12
Applicant: ANALOG DEVICES INC
Inventor： ATKINSON SIMON
Abstract: A direct conversion circuit for radio frequency signals includes a pair of quadrature related mixers (32,36), a phase shift unit (50), and a local oscillator (38). The pair of quadrature related mixers (32,36) is coupled to a radio frequency signal input port (30) for mixing down a radio frequency input signal. A non-integer frequency multiplier 40,44 multiplies the frequency of the voltage controlled oscillator (38) signal by a non-integer value to produce the local oscillator signal (34).
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公开(公告)号：WO0231963A3
公开(公告)日：2003-04-03
申请号：PCT/US0131703
申请日：2001-10-10
Applicant: ANALOG DEVICES INC
Inventor： MONTALVO ANTONIO J , ATKINSON SIMON
CPC classification number: H03C3/0991 , H03C3/0941 , H03C3/095 , H03C3/0966 , H03C3/0983 , H03C5/00 , H03L7/185 , H04L27/20
Abstract: Phase-locked loop methods and structures are provided for generating modulated communication signals with nonconstant envelopes. These methods and structures realize the improved communication performance of nonconstant-envelope modulation with the upconversion advantages of phase-locked loops. The structures include transmitters (100) in which a phase-locked loop (22) is augmented with first and second feedforward paths (45, 46) that substantially resotre phase and amplitude information to a transmit signal that is generated by a voltage-controlled oscillator (28) of the phase-locked loop. The first feedforward path is configured to realize a path transfer function of s/Kv wherein the voltage-controlled oscillator has a transfer function of Kv/s. The second feedforward path extracts an envelope-correction signal from the modulated intermediate-frequency signal and a variable-gain output amplifier (26) amplifies the transmit signal with a gain that responds to the envelope-correction signal.
Abstract translation: 提供锁相环方法和结构用于生成具有非恒定信封的调制通信信号。 这些方法和结构通过锁相环的上转换优点实现了非恒定包络调制的改进通信性能。 该结构包括发射器（100），其中锁相环（22）用第一和第二前馈路径（45,46）进行增强，第一和第二前馈路径基本上将相位和振幅信息重新分配给由压控振荡器产生的发射信号 （28）的锁相环。 第一前馈路径被配置为实现s / Kv的路径传递函数，其中压控振荡器具有Kv / s的传递函数。 第二前馈路径从调制的中频信号中提取包络校正信号，并且可变增益输出放大器（26）以对包络校正信号作出响应的增益来放大发射信号。
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公开(公告)号：WO03073659A2
公开(公告)日：2003-09-04
申请号：PCT/US0305260
申请日：2003-02-21
Applicant: ANALOG DEVICES INC
Inventor： ATKINSON SIMON , BIRK PALLE , STRANGE JONATHAN RICHARD
IPC: H04B1/00 , H04B1/06 , H04B1/38 , H04B1/40 , H04B1/44 , H04H20060101 , H04L27/20 , H04L27/22 , H04L27/227 , H04L27/32 , H04H
CPC classification number: H04B1/006 , H04L27/20 , H04L27/22 , H04L27/2272 , H04L27/32
Abstract: A dual mode transmitter for GSM and UMTS operation is provided. The GSM and UMTS paths share an oscillator and an intermediate frequency stage. Also, with the exception of the final stage of power amplification, the transmitter is provided as an integrated device.
Abstract translation: 提供了用于GSM和UMTS操作的双模发射机。 GSM和UMTS路径共享振荡器和中频级。 此外，除了功率放大的最后阶段之外，发射机被提供为集成装置。
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Patent Agency Ranking
公开(公告)号：GB2340687B
公开(公告)日：2001-04-04
申请号：GB9918941
申请日：1999-08-12
Applicant: ANALOG DEVICES INC
Inventor： ATKINSON SIMON
Abstract: A direct conversion circuit for radio frequency signals is disclosed. The circuit includes a pair of quadrature related mixers, a phase shift unit, and a local oscillator. The pair of quadrature related mixers is coupled to a radio frequency signal input port for mixing down a radio frequency input signal. The phase shift unit is in communication with at least one of the pair of mixers for phase shifting a local oscillator signal. The local oscillator produces the local oscillator signal. The local oscillator includes a non-integer frequency multiplier for multiplying the frequency of a first voltage controlled oscillator signal by a non-integer value to produce the local oscillator signal.
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公开(公告)号：WO03073660A2
公开(公告)日：2003-09-04
申请号：PCT/US0305261
申请日：2003-02-21
Applicant: ANALOG DEVICES INC
Inventor： ATKINSON SIMON , BIRK PALLE
CPC classification number: H04L27/0008 , H03G3/3052 , H03G3/3078 , H04W52/245 , H04W52/38
Abstract: An automatic gain control is provided for a multi-mode receiver. The gain control includes feed forward controller (402) which sets up an initial gain rapidly based on a measurement of signal strength or upon mode information, and a feedback controller (450) which then takes responsibility for maintaining a signal at a desired amplitude.
Abstract translation: 为多模式接收器提供自动增益控制。 增益控制包括前馈控制器（402），该前馈控制器基于信号强度或模式信息的测量结果快速设置初始增益，然后反馈控制器（450）然后负责将信号维持在期望幅度。
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公开(公告)号：WO02067413A2
公开(公告)日：2002-08-29
申请号：PCT/US0204450
申请日：2002-02-15
Applicant: ANALOG DEVICES INC
Inventor： ATKINSON SIMON , STRANGE JONATHAN R , BROUGHTON ROBERT J , SHVARTS ALEXANDER
Abstract: A transceiver circuit is disclosed for use in radio frequency communication systems. The circuit includes a transmitter circuit, a receiver circuit and a local oscillator circuit. The local oscillator circuit includes at least one oscillator input signal having a frequency that is a non-integer multiple of the transmission frequency of the radio frequency communication system. The oscillator input signal is used to produce a transmitter local oscillator signal and a receiver local oscillator signal.
Abstract translation: 公开了一种用于射频通信系统的收发器电路。 电路包括发射机电路，接收机电路和本地振荡器电路。 本地振荡器电路包括至少一个振荡器输入信号，其频率是射频通信系统的传输频率的非整数倍。 振荡器输入信号用于产生发送器本地振荡器信号和接收器本地振荡器信号。
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公开(公告)号：EP1476950A4
公开(公告)日：2005-07-20
申请号：EP03709295
申请日：2003-02-21
Applicant: ANALOG DEVICES INC
Inventor： ATKINSON SIMON , BIRK PALLE , HO STACY , ZVONAR ZORAN , CAHALANE AIDAN
Abstract: A homodyne receiver (Fig.2) is provided for receiving GSM and UMTS transmissions. The receiver may also be used for other transmission schemes. The receiver includes an electronically reconfigurable low pass filter (140, 150) and an off set generator for providing DC offset correction for offsets which may be generated as a result of coupling between a local radio frequency oscillator (122) and the receiver front end.
Abstract translation: 零差接收机（图2）用于接收GSM和UMTS传输。 接收器也可以用于其他传输方案。 该接收器包括可电子重构的低通滤波器（140,150）和偏置发生器，用于为由于本地射频振荡器（122）和接收器前端之间的耦合而产生的偏移提供DC偏移校正。
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公开(公告)号：EP1476974A4
公开(公告)日：2005-05-04
申请号：EP03716148
申请日：2003-02-21
Applicant: ANALOG DEVICES INC
Inventor： ATKINSON SIMON , CAHALANE AIDAN , FERGUSON PAUL JR
CPC classification number: H04B1/30 , H04B1/0003 , H04L25/062 , H04L25/063 , H04L27/0008
Abstract: In a UMTS homodyne (direct conversion) receiver the local oscillator may break through as an "on channel" signal. In order to remove this the receiver includes controllable DC offset generators and variable gain amplifiers. These are in series with a high pass filter. Adjustments in the gain or offset can give rise to transients within the filter which effectively blind the receiver until such time as the transients have decayed within the filter. This blind time can be reduced by increasing the bandwidth of the filter during such a transient.
Abstract translation: 在UMTS零拍（直接转换）接收机中，本地振荡器可能作为“通道上”信号突破。 为了消除这种情况，接收器包括可控直流偏移发生器和可变增益放大器。 这些与高通滤波器串联。 增益或偏移量的调整会引起滤波器内的瞬变现象，有效地使接收器失效，直到瞬态信号在滤波器内衰减为止。 在这种瞬变过程中，可以通过增加滤波器的带宽来减少盲时间。
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