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    • 1. 发明授权
    • Transmitter
    • 发射机
    • US06563883B1
    • 2003-05-13
    • US09320768
    • 1999-05-27
    • Marko LeinonenSimo KalevaHeikki MattilaHarri Lilja
    • Marko LeinonenSimo KalevaHeikki MattilaHarri Lilja
    • H04L2720
    • H03G3/3042H03F3/24H03F3/72H03F2203/7236H03F2203/7239H04B1/0483H04B2001/0408
    • A transmitter has an input for receiving a signal, gain controller for applying a first gain to the received signal, a first path for providing a second, relatively high gain for the received signal, a second path for providing a third, relatively low gain for said received signal, a transmitter for transmitting a signal and a controller to cause a received signal to pass through the gain controller and the first path when a relatively high gain is to be applied to the received signal and to cause a received signal to pass through the gain controller and the second path when a relatively low gain is to be applied to the received signal. When a change is made from using one of the first and second paths to using the other, the power of the signal transmitted by the transmitter varies by less than or equal to a predetermined amount.
    • 发射机具有用于接收信号的输入,用于对接收信号施加第一增益的增益控制器,用于为接收信号提供第二相对较高增益的第一路径,用于提供第三相对较低增益的第二路径 所述接收信号,用于发送信号的发射机和控制器,以便当对接收到的信号施加相对较高的增益并使接收的信号通过时,使接收的信号通过增益控制器和第一路径 当对接收到的信号施加相对低的增益时,增益控制器和第二路径。 当使用第一和第二路径之一来使用另一路径进行改变时,由发射机发送的信号的功率变化小于或等于预定量。
    • 4. 发明授权
    • Dual mode amplifier with bias control
    • 具有偏置控制的双模放大器
    • US5432473A
    • 1995-07-11
    • US92245
    • 1993-07-14
    • Heikki MattilaJorma MateroHannu Pakonen
    • Heikki MattilaJorma MateroHannu Pakonen
    • H03F1/30H03F3/72H03G3/30H04B1/04H03G3/20
    • H03F1/302H03F3/72H03G3/3042H04B2001/0416
    • A dual mode transmitter with bias control is described wherein an RF signal from a system modulator is fed to a gain control circuit, which can be either a voltage controlled amplifier or attenuator. The ultimate transmitter output power level depends on the attenuation/gain of the gain control circuit. The output signal from the gain control circuit is fed to a driver amplifier which amplifies the signal and feeds it to a power amplifier circuit, which may be comprised of several stages of bipolar transistors or GaAs FETs. The modulated signal to be transmitted is then fed from the power amplifier circuit through a coupler to an antenna terminal. The coupler is connected to an RF detector and is used for RF level monitoring. The Rf level signal from the RF detector is applied to a comparator circuit. An improved combination is provided by incorporating a bias control circuit. A Vpwr signal is applied as one input to the bias control circuit and a mode signal is applied as the other input. When the mode signal is "on" or present it signifies that the digital transmission mode is to be employed. When the mode signal is " off" or at zero level, it indicates that the analog transmission mode is to be employed. The bias control circuit provides three bias signal outputs, V.sub.b1 applied to the driver amplifier, and V.sub.b2 and V.sub.b3, applied to the power amplifier. The levels of V.sub.b1, V.sub.b2 and V.sub.b3 are varied for the analog and digital transmission modes.
    • 描述了具有偏置控制的双模发射机,其中来自系统调制器的RF信号被馈送到增益控制电路,增益控制电路可以是压控放大器或衰减器。 最终的发射机输出功率电平取决于增益控制电路的衰减/增益。 来自增益控制电路的输出信号被馈送到放大信号的驱动放大器,并将其馈送到功率放大器电路,功率放大器电路可以由多级双极晶体管或GaAs FET组成。 然后,要发送的调制信号从功率放大器电路通过耦合器馈送到天线端子。 耦合器连接到RF检测器,用于RF电平监控。 来自RF检测器的Rf电平信号被施加到比较器电路。 通过结合偏置控制电路来提供改进的组合。 将Vpwr信号作为一个输入施加到偏置控制电路,并且将模式信号作为另一个输入。 当模式信号为“开”或存在时,表示要采用数字传输模式。 当模式信号为“关闭”或零电平时,表示要使用模拟传输模式。 偏置控制电路提供三个偏置信号输出,Vb1施加到驱动放大器,Vb2和Vb3施加到功率放大器。 对于模拟和数字传输模式,Vb1,Vb2和Vb3的电平是不同的。
    • 5. 发明授权
    • Dual mode radiotelephone terminal selectively operable for frequency
modulated or phase modulated operation
    • 双模式无线电话终端可选择性地用于频率调制或相位调制操作
    • US5392460A
    • 1995-02-21
    • US52335
    • 1993-04-23
    • Heikki MattilaJorma MateroJaakko Hulkko
    • Heikki MattilaJorma MateroJaakko Hulkko
    • H03C3/00H03C3/40H03D7/16H04B1/52
    • H03C3/40H03C3/00H03D7/163
    • A dual-mode radiotelephone terminal includes a .pi./4-shift DQPSK modulator (11). A dual-mode modulation is achieved by mixing an output of a transmitter oscillator (16) with an output of an offset oscillator (18) to form an injection signal (LO) at a final transmitter frequency, the injection signal being further modulated with a quadrature modulator in a digital mode of operation. In an analog mode of operation the transmitter oscillator or the offset oscillator is frequency modulated and the quadrature modulator is disabled, thereby passing the frequency modulated injection signal without substantial attenuation. The LO signal is regenerated and also phase shifted with a circuit (35) having a frequency multiplier (30) and a frequency divider (34). The circuit outputs two local oscillator (LO) signals (LOA and LOB), each of which directly drives an associated quadrature mixer (36, 38) of the modulator. In another embodiment the dual-mode radiotelephone terminal includes a VHF synthesizer (23), a UHF synthesizer (21), and a local oscillator (4C) that provides a signal only when operating in the analog receiving mode. The local oscillator signal is mixed with a first IF signal for providing a second IF signal when operating in the analog receiving mode or in a standby mode. A control signal is employed for selectively enabling and disabling various of these components as a function of the operating mode, thereby conserving power.
    • 双模无线电话终端包括一个π/ 4位DQPSK调制器(11)。 通过将发射机振荡器(16)的输出与偏移振荡器(18)的输出混合以在最终发射机频率处形成注入信号(LO)来实现双模式调制,所述注入信号进一步被调制为 正交调制器处于数字操作模式。 在模拟操作模式下,发射机振荡器或偏移振荡器进行频率调制,正交调制器被禁用,从而通过频率调制的注入信号而没有实质的衰减。 LO信号被再生并且还与具有倍频器(30)和分频器(34)的电路(35)相移。 电路输出两个本地振荡器(LO)信号(LOA和LOB),每个本地振荡器(LO)信号直接驱动调制器的相关联的正交混频器(36,38)。 在另一个实施例中,双模式无线电话终端包括VHF合成器(23),UHF合成器(21)和只在模拟接收模式下工作时提供信号的本地振荡器(4C)。 本地振荡器信号与第一IF信号混合,以在模拟接收模式或待机模式下工作时提供第二IF信号。 采用控制信号作为操作模式的功能选择性地启用和禁用这些组件中的各种,从而节省功率。
    • 7. 发明授权
    • Dual mode FM and DQPSK modulator
    • 双模FM和DQPSK调制器
    • US5446422A
    • 1995-08-29
    • US305584
    • 1994-09-14
    • Heikki MattilaJorma MateroJaakko Hulkko
    • Heikki MattilaJorma MateroJaakko Hulkko
    • H03C3/00H03C3/40H03D7/16H04L27/12H04L27/20
    • H03C3/40H03C3/00H03D7/163
    • A dual-mode radiotelephone terminal includes a .pi./4-shift DQPSK modulator (11). A dual-mode modulation is achieved by mixing an output of a transmitter oscillator (16) with an output of an offset oscillator (18) to form an injection signal (LO) at a final transmitter frequency, the injection signal being further modulated with a quadrature modulator in a digital mode of operation. In an analog mode of operation the transmitter oscillator or the offset oscillator is frequency modulated and the quadrature modulator is disabled with a bias signal, thereby passing the frequency modulated injection signal without substantial attenuation. The LO signal is regenerated and also phase shifted with a circuit (35) having a frequency multiplier (30) and a frequency divider (34). The circuit outputs two local oscillator (LO) signals (LOA and LOB), each of which directly drives an associated quadrature mixer (36, 38) of the modulator. A control signal is employed for selectively enabling and disabling various of these components as a function of the operating mode, thereby conserving power.
    • 双模无线电话终端包括一个π/ 4位DQPSK调制器(11)。 通过将发射机振荡器(16)的输出与偏移振荡器(18)的输出混合以在最终发射机频率处形成注入信号(LO)来实现双模式调制,所述注入信号进一步被调制为 正交调制器处于数字操作模式。 在模拟操作模式下,发射机振荡器或偏移振荡器进行频率调制,并且使用偏置信号禁用正交调制器,从而通过频率调制的注入信号而没有实质的衰减。 LO信号被再生并且还与具有倍频器(30)和分频器(34)的电路(35)相移。 电路输出两个本地振荡器(LO)信号(LOA和LOB),每个本地振荡器(LO)信号直接驱动调制器的相关联的正交混频器(36,38)。 采用控制信号作为操作模式的功能选择性地启用和禁用这些组件中的各种,从而节省功率。
    • 9. 发明授权
    • Tuning techniques for I/Q channel signals in microwave digital
transmission systems
    • 微波数字传输系统中I / Q通道信号的调谐技术
    • US5371481A
    • 1994-12-06
    • US36631
    • 1993-03-24
    • Erkki TiittanenHeikki MattilaTapio RautavaJorma MateroKjell OstmanMikko Halttunen
    • Erkki TiittanenHeikki MattilaTapio RautavaJorma MateroKjell OstmanMikko Halttunen
    • H03C3/40H04B1/04H04L27/20H04L27/36
    • H04L27/364H03C3/406H04B1/0475H04L27/2071
    • Structure and technique, for calibrating a vector modulator that does not require a network analyzer, are disclosed which are incorporated in a vector modulation system comprising a standard vector modulator circuit including means for shifting phase to adjust the relative phases of the I and Q components of the modulated RF carrier. Means for attenuating are included in the I and Q modulation system to adjust the relative amplitude of the modulation signals. The disclosure describes a technique wherein the microwave transmitter's I and Q phase difference is measured by measuring the power levels of the I and the Q signals. The power levels are compared and a correction value is stored in a read-only memory to compensate for the error. More particularly, the error compensation is achieved by first determining amplitude error or unbalance by I and Q signal power measurement and an amplitude compensation signal is stored, then a power measurement is carried out for phase compensation and a phase compensation signal is stored.
    • 公开了用于校准不需要网络分析器的矢量调制器的结构和技术,其被并入矢量调制系统中,该矢量调制系统包括标准矢量调制器电路,该标准矢量调制器电路包括用于转换相位的装置,以调整I和Q分量的相对相位 调制RF载波。 在I和Q调制系统中包括用于衰减的装置,以调整调制信号的相对幅度。 本公开描述了一种技术,其中通过测量I和Q信号的功率电平来测量微波发射器的I和Q相位差。 功率电平进行比较,校正值存储在只读存储器中以补偿误差。 更具体地,通过首先通过I和Q信号功率测量来确定振幅误差或不平衡来实现误差补偿,并且存储幅度补偿信号,然后对相位补偿进行功率测量并存储相位补偿信号。