会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 5. 发明授权
    • Measurement of DC offsets in IQ modulators
    • IQ调制器中直流偏移的测量
    • US09025648B2
    • 2015-05-05
    • US13774565
    • 2013-02-22
    • Tektronix, Inc.
    • Zoltan Azary
    • H04B3/46H04B17/00H03C3/40H04L27/36
    • H04B17/104H03C3/40H04L27/364H04L27/3854
    • Described are systems and methods of determining DC offset voltages in IQ modulators. First, two different DC test voltages are selected for one of the inputs to the IQ modulator. Then, a first test voltage is applied to one input to the IQ modulator while test data is generated by measuring outputs from a set of signals applied to the other input to the IQ modulator. Then the second test voltage is applied and another set of test data generated. From the first and second sets of test data, second-order polynomial functions may be constructed and compared to one another to yield a ratio of power value outputs. Then the DC offset voltages may be determined from the ratio of power value outputs.
    • 描述了在IQ调制器中确定DC偏移电压的系统和方法。 首先,为IQ调制器的输入之一选择两个不同的直流测试电压。 然后,通过测量从施加到IQ调制器的另一个输入的一组信号的输出来产生测试数据,将第一测试电压施加到IQ调制器的一个输入。 然后施加第二个测试电压,并产生另一组测试数据。 从第一组和第二组测试数据中,可以构造二阶多项式函数并将其相互比较以产生功率值输出的比率。 然后可以根据功率值输出的比率来确定DC偏移电压。
    • 8. 发明授权
    • Semiconductor integrated circuit for communication
    • 半导体集成电路通讯
    • US08315579B2
    • 2012-11-20
    • US12917135
    • 2010-11-01
    • Ryoji FuruyaKazuhisa OkadaHiroaki Matsui
    • Ryoji FuruyaKazuhisa OkadaHiroaki Matsui
    • H04B1/04H04B1/00
    • H03D3/007H03C3/40H03D7/1433H04B1/406
    • The present invention provides a semiconductor integrated circuit for communication (RF IC) realizing high yield without deteriorating a carrier leak characteristic even when a modulation circuit is formed by using cheep parts with large variations. In a semiconductor integrated circuit (RF IC) including: an input circuit constructed by a differential amplifier circuit and a level shifter, which is provided on the ante stage of a mixer of a differential circuit called a Gilbert Cell; and a modulation circuit that performs modulation by adding an I/Q signal and a carrier wave signal, a calibration circuit for canceling a DC offset in an output of the input circuit is provided.
    • 本发明提供了一种用于通信(RF IC)的半导体集成电路,即使在通过使用具有大变化的尖峰部分形成调制电路时,也能实现高产率而不劣化载波泄漏特性。 一种半导体集成电路(RF IC),包括:由差分放大电路和电平移位器构成的输入电路,其设置在称为吉尔伯特细胞的差分电路的混频器的前端; 以及通过添加I / Q信号和载波信号来执行调制的调制电路,提供了用于消除输入电路的输出中的DC偏移的校准电路。
    • 9. 发明授权
    • Complex envelope elimination and restoration transmitter
    • 复信封消除和恢复发射机
    • US08300728B1
    • 2012-10-30
    • US12284726
    • 2008-09-24
    • Theodore J. HoffmannDavid W. Cripe
    • Theodore J. HoffmannDavid W. Cripe
    • H03C3/00
    • H03C3/40H03C5/00H03C2200/0058
    • The invention is a method of transmitting a radio signal using a complex envelope elimination and restoration technique. The method includes receiving a radio frequency (RF) signal. Further, the method includes separating the RF signal into an in-phase baseband signal (I) and a quadrature baseband signal (Q). Still further, the method includes decomposing the (I) signal into a in-phase magnitude component and a in-phase phase component while decomposing the Q signal into a quadrature magnitude component and a quadrature phase component. Alternatively, the source signal could be digital baseband information. Digital signal processing could generate the phase and magnitude reference signals for the system.
    • 本发明是一种使用复信封消除和恢复技术发送无线电信号的方法。 该方法包括接收射频(RF)信号。 此外,该方法包括将RF信号分离为同相基带信号(I)和正交基带信号(Q)。 此外,该方法包括将(I)信号分解为同相幅度分量和同相相位分量,同时将Q信号分解成正交幅度分量和正交相位分量。 或者,源信号可以是数字基带信息。 数字信号处理可以产生系统的相位和幅度参考信号。