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    • 5. 发明授权
    • Transceiver switchover arrangement
    • 收发器切换布置
    • US6021318A
    • 2000-02-01
    • US17181
    • 1998-02-02
    • Josef-Paul Schaffer
    • Josef-Paul Schaffer
    • H01P1/15H04B1/403H04B1/44H04B1/48H04B1/50
    • H04B1/005H04B1/48H04B1/406
    • In a transceiver switchover arrangement for alternating connection of a first and a second receiver apparatus, and a first and a second transmitter apparatus, with a single antenna, the first receiver apparatus and the first transmitter apparatus are designed for a first frequency band f1, and the second receiver apparatus and the second transmitter apparatus are designed for a second frequency band f2. By means of on-off switches, in connection with two line sections, of which each represents a quarter-wave line for f2, and which serially represent a quarter-wave line for f1, one of the apparatuses is coupled to the antenna according to the mode of operation.
    • 在第一和第二接收机装置和第一和第二发射机装置与单个天线交替连接的收发机切换装置中,第一接收机装置和第一发射机装置被设计用于第一频带f1,以及 第二接收机装置和第二发射机装置被设计用于第二频带f2。 通过开 - 关开关,连接两个线段,其中每个线段分别表示用于f2的四分之一波长线,并且其连续表示f1的四分之一波长线,其中一个装置根据 操作方式。
    • 6. 发明授权
    • Circuit configuration for setting the operating point of a radiofrequency transistor and amplifier circuit
    • 用于设置射频晶体管和放大器电路的工作点的电路配置
    • US06664856B2
    • 2003-12-16
    • US10236886
    • 2002-09-06
    • Josef-Paul Schaffer
    • Josef-Paul Schaffer
    • H03F304
    • H03F1/302
    • An amplifier circuit with a radiofrequency transistor has a circuit for setting the operating point. The setting circuit provides a base current for the radiofrequency transistor depending on the voltage drop across a resistor that is connected into the collector circuit of the radiofrequency transistor. The circuit has a differential element, which is fed by the supply voltage and compares the voltage drop across the resistor with a reference voltage. The base current is generated by a current source in dependence on the voltage difference. The circuit requires only a low supply voltage, with the result that the power consumed in the resistor is also low. The circuit can be implemented with a small number of components.
    • 具有射频晶体管的放大器电路具有用于设定工作点的电路。 设置电路根据连接到射频晶体管的集电极电路的电阻器上的电压降,为射频晶体管提供基极电流。 该电路具有由电源电压馈送的差分元件,并将电阻器两端的电压降与参考电压进行比较。 基极电流根据电压差由电流源产生。 该电路仅需要低电源电压,结果是电阻器消耗的功率也很低。 该电路可以用少量组件来实现。
    • 7. 发明授权
    • Optoelectronic transmission system and method
    • 光电传输系统及方法
    • US08693883B2
    • 2014-04-08
    • US12704021
    • 2010-02-11
    • Jaime Estevez-GarciaJosef-Paul Schaffer
    • Jaime Estevez-GarciaJosef-Paul Schaffer
    • H04B10/00
    • H01L31/02327H01L31/0232H01L31/105H01L31/1105H01L31/1113H01L31/167H01L31/173H01L33/58
    • An optoelectronic transmission system has a photoemitter semiconductor component and a photodetector semiconductor component. The photoemitter semiconductor component has a radiation source for converting a first electrical signal into a first electromagnetic radiation and a first polarization filter having a first polarization direction for filtering the first electromagnetic radiation. The photodetector semiconductor component has a second polarization filter having a second polarization direction for filtering a second electromagnetic radiation and a sensor element for converting a second electromagnetic radiation which has been polarized by the polarization filter into a second electrical signal. In this case, the first polarization direction of the first polarization filter is identical to the second polarization direction of the second polarization filter.
    • 光电传输系统具有光发射器半导体部件和光电检测器半导体部件。 光发射器半导体部件具有用于将第一电信号转换为第一电磁辐射的辐射源和具有用于滤波第一电磁辐射的第一偏振方向的第一偏振滤光器。 光检测器半导体元件具有第二偏振滤波器,其具有用于滤波第二电磁辐射的第二偏振方向和用于将已被偏振滤波器偏振的第二电磁辐射转换为第二电信号的传感器元件。 在这种情况下,第一偏振滤波器的第一偏振方向与第二偏振滤波器的第二偏振方向相同。