High frequency amplifier and control
    3.
    发明公开
    High frequency amplifier and control 失效
    Hochfrequenzverstärkerund Steuerung

    公开(公告)号:EP0789451A1

    公开(公告)日:1997-08-13

    申请号:EP97101439.4

    申请日:1997-01-30

    IPC分类号: H03F1/30 H03F1/52

    CPC分类号: H03F1/523 H03F1/305

    摘要: A monolithic RF amplifier circuit (10) suitable for use in the 0.8-2 GHz frequency range comprises, on-chip (12'), a gateable oscillator (24) running at about 2-5 times the amplifier input frequency or higher, coupled to a rectifier (30) and a low pass filter (34) for producing a DC signal which is fed via a bias/gain control circuit (46) to a bias / gain inputs (56, 58) of one or more amplification stages (60, 62) (e.g. GaAs FET) to provide bias therefore to ensure safe operation, and a priority control circuit (42) responsive to the bias. The priority control circuit (42) operates a power switch (18) that couples the amplification stages (60, 62) to a power supply, only when bias is present on their bias/gain inputs (56, 58) This protects the amplification stages (60, 62) against overcurrent operation. A separate external port (68) to the bias / gain control circuit (46) adjusts the magnitude of the bias to permit amplifier gain and power output to be adjusted. By gating the oscillator ON and OFF, high speed burst mode operation of the amplifier is achieved.

    摘要翻译: 适用于0.8-2GHz频率范围的单片RF放大器电路(10)包括片上(12'),以大约2-5倍放大器输入频率或更高频率运行的可选择振荡器(24),耦合 用于产生经由偏置/增益控制电路(46)馈送到一个或多个放大级的偏置/增益输入(56,58)的DC信号的整流器(30)和低通滤波器(34) (例如GaAs FET),以提供偏置以确保安全操作,以及响应偏压的优先控制电路(42)。 优先级控制电路(42)只有在偏置/偏置存在于它们的偏置/增益输入(56,58)上时才将功率开关18连接到电源上。这保护了放大级 (60,62)防过电流操作。 与偏置/增益控制电路(46)的单独的外部端口(68)调整偏置的大小以允许调整放大器增益和功率输出。 通过选通振荡器的ON和OFF,实现了放大器的高速脉冲串模式操作。

    Frequency synthesiser
    6.
    发明公开
    Frequency synthesiser 失效
    频率合成器

    公开(公告)号:EP0961412A1

    公开(公告)日:1999-12-01

    申请号:EP98401301.1

    申请日:1998-05-29

    IPC分类号: H03L7/197 H03C3/09

    摘要: A direct modulation multi-accumulator fractional-N frequency synthesiser (1) for generating a carrier signal (150) modulated by a modulation signal (170), (121), the frequency synthesiser comprising a Voltage Controlled Oscillator, VCO (10), having a tuning port for controlling the frequency of the signal (110) output by the VCO, a variable divider (20) and a multi-accumulator frequency generator (21) for controlling the variable divider, a reference signal generator (50), a phase detector (30) and a low pass filter (40), these elements being arranged to form a Phase Locked Loop arrangement, the directly modulated output signal of which is taken from the output of the VCO, wherein in-band modulation is performed by varying the variable divider and out-of-band modulation is performed by directly applying the modulating signal to the VCO tuning port.

    摘要翻译: 一种用于产生由调制信号(170)调制的载波信号(150)的直接调制多累加器分数N频率合成器(1),(121),该频率合成器包括压控振荡器VCO(10),该压控振荡器具有VCO 用于控制由VCO输出的信号(110)的频率的调谐端口,用于控制可变分频器的可变分频器(20)和多累加器频率发生器(21),参考信号发生器(50),相位 检测器(30)和低通滤波器(40),这些元件被安排成形成锁相环结构,其直接调制输出信号取自VCO的输出端,其中带内调制是通过改变 通过将调制信号直接施加到VCO调谐端口来执行可变分频器和带外调制。

    Frequency synthesiser
    7.
    发明公开
    Frequency synthesiser 失效
    频率合成器

    公开(公告)号:EP0948138A1

    公开(公告)日:1999-10-06

    申请号:EP98400805.2

    申请日:1998-04-03

    IPC分类号: H03L7/197 H03K23/66

    摘要: A sequence generator and applier (90) for applying a sequence to a frequency divider (5) forming part of a frequency synthesiser (50), the sequence generator and applier (90) including generating means (120) for generating a sequence associated with one or more frequencies to be synthesised by the frequency synthesiser, storage means (100) for storing the sequence once generated and application means (100) for applying the sequence from the storage means (100) to the frequency divider (5).

    摘要翻译: 一种序列产生器和施加器(90),用于将序列施加到形成频率合成器(50)的一部分的分频器(5),序列产生器和施加器(90)包括产生装置(120),用于产生与一个 或更多频率由频率合成器合成,存储装置(100)用于存储一旦产生的序列,以及用于从存储装置(100)向分频器(5)施加序列的应用装置(100)。

    Communications system, network, portable device and method
    8.
    发明公开
    Communications system, network, portable device and method 失效
    系统,Netz,tragbaresGerätund VerfahrenfürÜbertragung

    公开(公告)号:EP0907297A1

    公开(公告)日:1999-04-07

    申请号:EP97402302.0

    申请日:1997-10-01

    摘要: A communications system (5) has a network (10) arranged for communication with portable communications devices (100, 200), and is further arranged for providing at least one parameter for transmission to the portable communications devices. A portable communication device is arranged for communicating with the network and is further arranged to receive the parameter, the parameter containing an indication of required dynamic spectral splattering characteristics of output power of the transmitter of the device.

    摘要翻译: 通信系统(5)具有布置成与便携式通信设备(100,200)进行通信的网络(10),并且还被布置为提供用于传输到便携式通信设备的至少一个参数。 便携式通信设备被布置为与网络通信,并且还被布置为接收该参数,该参数包含设备的发射机的输出功率所需的动态频谱飞溅特性的指示。