公开(公告)号：EP0264470A1

公开(公告)日：1988-04-27

申请号：EP86114537.3

申请日：1986-10-21

申请人： International Business Machines Corporation

发明人： Ludwig, Thomas, Dipl.-Ing. ,  Schettler, Helmut, Dipl.-Ing. ,  Zuehlke, Rainer, Dr.-Ing. ,  Wagner, Otto, Dipl.-Ing.

IPC分类号： H03K6/04 ,  H03G11/08

CPC分类号： H03K6/04 ,  H03G11/008 ,  H03K19/018557

摘要： Es wird ein Verfahren zur digitalen Regelung der Flankensteilheit der Ausgangssignale von Leistungsverstärkern und ein zur Durchführung des Verfahrens geeigneter Leistungsverstärker beschrieben. Die Erfassung des Istwertes der Flankensteilheit erfolgt entweder über die Anzahl von Taktimpulsen, die einem Zähler (10) während eines Meßintervalls zugeführt werden, dessen Dauer von der Flankensteilheit abhängig ist. Ein solches Meßintervall wird erzeugt durch Zuführen der Impulse eines Ringoszillators (1), der einen der Leistungsverstärker (2) enthält, zu einem weiteren Zähler (9) bis zu dessen Überlauf. Eine andere Möglichkeit zum Erfassen des Istwertes der Flankensteilheit besteht darin, die Anzahl der Impulse des Ringoszillators (1) während eines Meßintervalls fest vorgegebener Dauer zu zählen. Ist- und Sollwert der Flankensteilheit werden verglichen. Das Vergleichsergebnis ändert den Inhalt eines Links/Rechts- Schieberegisters (19). Seine Parallelausgänge (21) beeinflussen über Steuerleitungen (22) Steuereingänge (23) der Leistungsverstärker, um deren Flankensteilheit durch Zu- oder Abschalten von hinsichtlich ihrer Schaltstrecken parallel geschalteten Ausgangstransistoren zu ändern.

摘要翻译： 一种用于数字方式控制功率放大器的输出信号的边缘陡度的方法，以及用于执行所述方法的合适的功率放大器。 该检测使用时钟脉冲的任一数，其持续时间依赖于斜率的测量间隔期间所提供的计数器（10）的斜率的实际值的。 这种测量间隔由将含有功率放大器（2）到另一个计数器（9）至其溢出中的一个的环形振荡器（1）的脉冲产生的。 用于检测所述斜率的实际值的另一种可能性是一个测量间隔固定的预定持续时间期间进行计数环形振荡器（1）的脉冲的数目。 斜率的实际和期望的值进行比较。 该比较结果改变一个左/右移位寄存器（19）的内容。 其并行输出（21）上的控制线的功率放大器（22）的控制输入（23）影响通过接通或关断的改变转换速率并联连接相对于它们的切换路径的输出晶体管。

公开(公告)号：EP0221529A2

公开(公告)日：1987-05-13

申请号：EP86115227.0

申请日：1986-11-03

申请人： The Grass Valley Group, Inc.

发明人： Trethewey, Paul Martell

IPC分类号： H03K5/01 ,  H03K6/04

CPC分类号： H03K5/02

摘要： Apparatus for receiving a step-form input signal and providing a limited slew rate output signal in response thereto comprises an amplifier (26) that is operative to provide at its output terminal a current that is variable linearly between a maxi­mum value of one polarity and a maximum value of the opposite polarity when the potential of its input terminal relative to its output terminal varies within a predetermined range. The magni­tudes of the two maximum values are dependent on the magnitude of a control signal applied to a slope-control terminal (31) of the amplifier (26). The ap­paratus also comprises a resistor (34) connected between the output terminal of the amplifier and an output terminal of the apparatus, and a capacitor (42) connected between the output terminal of the apparatus and a reference potential level.

摘要翻译： 用于接收步进形式输入信号并提供响应于此的有限转换速率输出信号的装置包括放大器（26），其可操作以在其输出端提供在一极性的最大值与 当其输入端子相对于其输出端子的电位在预定范围内变化时，相反极性的最大值变化。 两个最大值的大小取决于施加到放大器（26）的斜率控制端子（31）的控制信号的幅度。 该装置还包括连接在放大器的输出端子和装置的输出端子之间的电阻器（34），以及连接在装置的输出端子和参考电位电平之间的电容器（42）。

公开(公告)号：EP0164615A2

公开(公告)日：1985-12-18

申请号：EP85106193.7

申请日：1985-05-21

申请人： International Business Machines Corporation

发明人： Raver, Norman

IPC分类号： H03K5/02 ,  H03K17/16 ,  H03K6/04

CPC分类号： H03K6/04 ,  H03K17/166 ,  H03K19/00361

摘要： (D An off-chip driver (OCD) circuit is described including a first output device (10) and a second output device (12) having a common output connection (14) wherein a rising (1 bit) or falling (0 bit) signal is applied through an input circuit (8) to the output devices.
The output signal which appears at the common output connection will exhibit a rise time and a fall time corresponding to the rise and fall of the input signal.
A first monitoring device (18) is connected to the output signal to monitor the rise time of the output signal and a second monitoring device (20) is connected to the output signal to monitor the fall time of the output signal.
A ramp generator (22) is provided which generates a reference signal which also includes a rise time and a fall time.
The two monitor circuits (18, 20) compare the rise and fall times of the output signal with the reference rise time and reference fall time to produce a feedback signal to control the rise and fall times of the output signal in accordance with the reference signal.

公开(公告)号：EP0054106B1

公开(公告)日：1985-06-26

申请号：EP81106990.5

申请日：1981-09-07

申请人： ROBERT BOSCH GMBH

发明人： Siegmar, Winfried

IPC分类号： H03K4/69 ,  H03K6/02 ,  H03K6/04

CPC分类号： H03K4/69 ,  H03K6/02 ,  H03K6/04

公开(公告)号：EP1878111B1

公开(公告)日：2015-10-28

申请号：EP06758560.4

申请日：2006-04-21

申请人： Skyworks Solutions, Inc.

发明人： BEAMISH, Norman J.

IPC分类号： H03D1/04 ,  H03K5/01 ,  H03D1/06 ,  H03K6/04 ,  H04L1/00

CPC分类号： H04B1/30 ,  H03D3/008

公开(公告)号：EP1281262A4

公开(公告)日：2008-09-10

申请号：EP01913130

申请日：2001-02-28

申请人： POWERWAVE TECHNOLOGIES INC

发明人： HUNTON MATTHEW J

IPC分类号： H04L25/03 ,  H04L27/26 ,  H04L27/36 ,  H04L1/00 ,  H03D1/04 ,  H03D1/06 ,  H03K5/02 ,  H03K6/04 ,  H04B1/10 ,  H04L25/08

CPC分类号： H04B1/707 ,  H04B2201/70706 ,  H04L25/03343 ,  H04L27/2614 ,  H04L27/2621 ,  H04L27/366

摘要： A system and method for signal peak reduction in a spread spectrum communication system of the type including a filter for limiting signal bandwidth of symbols transmitted from the system. A signal peak reduction un it (122) is provided before the filter (126) the includes a filter predictor (146) that predicts the effect of that filter on input symbols by using filt er coefficient values corresponding to the filter impulse response function. Input symbols that are predicted to cause the output signal to exceed a predetermined peak limit value are adjusted. Several examples of suitable algorithms for calculating the necessary peak reduction to be applied to the input symbols are disclosed. The peak reduction unit provides adjusted symbo ls to the filter for processing and communication system output.

公开(公告)号：EP1632023A4

公开(公告)日：2008-05-07

申请号：EP04709954

申请日：2004-02-11

申请人： BHC CONSULTING PTY LTD

发明人： CANDY BRUCE HALCRO

IPC分类号： H03F3/217 ,  H03F1/32 ,  H03F1/34 ,  H03F3/38 ,  H03K4/06 ,  H03K6/04

CPC分类号： H03F1/32 ,  H03F1/34 ,  H03F3/217 ,  H03F2200/03 ,  H03F2200/351 ,  H03K4/06 ,  H03K7/08

摘要： An electronic class-D amplifier with intrinsically low distortion employing modulation of the slopes of a triangular-wave carrier reference signal; the modulation being in proportion to the derivative of the input signal. The negation of the distortion is most successful if this derivative signal is shifted in phase and gain to compensate for the closed loop phase and gain of the amplifier. The amplifier includes a pulse width modulator which includes an oscillator (5) with at least one integrator and a first comparator (6), at least one servo-loop amplifier (3), an input signal processor (4) which processes and modifies the input amplifier signal. An output signal of the oscillator produces a carrier reference signal (13) which includes at least positive and negative time derivative components, which are modulated by an output of the input signal processor (4) which is applied to a modulation input of the oscillator (5), whereby at least the symmetry of the carrier reference signal is modulated. An output (11) of the output switching stage is fed back via a negative feedback path (15) to an input of the servo-loop amplifier (3).

公开(公告)号：EP1456949B1

公开(公告)日：2007-02-14

申请号：EP02795152.4

申请日：2002-12-11

申请人： austriamicrosystems AG

发明人： DEUTSCHMANN, Bernd ,  FRAISS, Gottfried

IPC分类号： H03K5/01 ,  H03K6/04 ,  H03K4/94

CPC分类号： H03K17/164 ,  H03K4/00 ,  H03K5/08

摘要： The invention relates to a circuit arrangement for the provision of an output signal with adjustable flank pitch, whereby the several, parallel inverter output stages (5, 6; 7, 8; 9, 10; 11, 12) are connected in parallel on the load side. The output stages are controlled with a common trapezoidal signal (C), generated by a ramp signal generator (3). The output transistors (5 to 12) are thus sequentially switched on and off. A precisely adjustable, reduced flank pitch for an output signal with a desired amplifier power can thus be achieved with a low spatial requirement. Furthermore an adjustable reduction in the high-frequency interference emissions from integrated circuits can thus be achieved.

公开(公告)号：EP1652291A2

公开(公告)日：2006-05-03

申请号：EP04780551.0

申请日：2004-07-27

申请人： MOTOROLA, INC.

发明人： D'AMICO, Thomas, V. ,  PETERSON, Roger, L.

IPC分类号： H03D1/04 ,  H03D1/06 ,  H03K6/04

CPC分类号： H04W16/14 ,  H04W74/04

摘要： A communication system (100) is designed that reduces co-channel interference when heterogeneous users (101-104) are sharing spectrum. The system design enables a plurality of pairs of users to communicate their channel utilization time periods by using the durations and start or stop times of certain transmissions to signal the start times and durations of later transmissions. Other system users using possibly different communications protocols and different modulation technologies can measure the durations of received transmissions and to infer channel usage based on these durations.

摘要翻译： 设计一种通信系统（100），其用于在异构用户（101-104）共享频谱时减少同信道干扰。 系统设计使得多对用户能够通过使用某些传输的持续时间和开始或停止时间来发信号通知稍后传输的开始时间和持续时间来传达它们的信道使用时间周期。 使用可能不同的通信协议和不同调制技术的其他系统用户可以测量接收到的传输的持续时间并基于这些持续时间推断信道使用。

公开(公告)号：EP1371132A4

公开(公告)日：2005-11-23

申请号：EP02715107

申请日：2002-03-14

申请人： NAVINI NETWORKS INC

发明人： XU GUANGHAN

IPC分类号： H04B7/06 ,  H04B7/08 ,  H04L1/02 ,  H04L1/06 ,  H04L5/14 ,  H04L25/02 ,  H04L25/52 ,  H03D1/04 ,  H03D1/06 ,  H03K5/01 ,  H03K6/04 ,  H04B1/10 ,  H04L1/00 ,  H04L25/08

CPC分类号： H04L25/03343 ,  H04B7/0617 ,  H04B7/086 ,  H04L1/02 ,  H04L1/06 ,  H04L5/14 ,  H04L25/0206 ,  H04L25/0228 ,  H04L2025/03802

摘要： A method and system is provided for estimating a first wireless communication channel (FWCC) transmitting a data stream from a first antenna system (FAS) to a second antenna system (SAS) in a telecommunication system, the telecommunication system having a second wireless communication channel (SWCC) for transmitting data from the MT to the antenna. First, one or more characteristics of the SWCC (SWCC Characteristics) are analyzed based on the data stream received by the antenna system from the MT. From the data stream received, an initial condition of the FWCC is also extracted. One or more characteristics of the FWCC (FWCC Characteristics) are predicted based on the SWCC Characteristics and the extracted initial condition, wherein analyzing the SWCC Characteristic and estimating the FWCC Characteristics relying on the feature that the data stream has a plurality of data segments whose Doppler frequencies are close to each other to an extent that the Doppler frequencies are deemed as the same for the purpose of analyzing the SWCC Characteristics.

摘要翻译： 提供了一种用于估计在电信系统中从第一天线系统（FAS）到第二天线系统（SAS）发送数据流的第一无线通信信道（FWCC）的方法和系统，所述电信系统具有第二无线通信信道 （SWCC），用于将数据从MT发送到天线。 首先，基于由天线系统从MT接收的数据流来分析SWCC（SWCC特性）的一个或多个特性。 从接收到的数据流中，也提取出FWCC的初始状态。 根据SWCC特性和提取的初始条件预测FWCC的一个或多个特性（FWCC特性），其中分析SWCC特性并根据特征来估计FWCC特征，该特征是数据流具有多个数据段，其多普勒 频率彼此接近，以达到分析SWCC特性的目的，将多普勒频率视为相同的程度。