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公开(公告)号：US4754265A
公开(公告)日：1988-06-28
申请号：US786529
申请日：1985-10-11
CPC分类号： H01P1/185 , H03L7/0812
摘要： A phase shifter uses a PIN diode or diode pairs operated in a switching mode to switch transmission-line elements for phase-shifting radio frequency or microwave signals. A drive circuit for each diode(s) includes a FET switch controlled by a first level of a bilevel control signal to apply B+ to forward bias the diode(s) with a forward current. When forward biased, the active region of the diode(s) becomes flooded with charge carriers. The first FET switch is turned OFF by a second level of the bilevel control signal, and a second FET switch is turned ON to apply a reverse bias voltage to the diode(s) to render them nonconductive. Before the diode(s) become nonconductive, the excess charge carriers must be swept out of the diode(s). To achieve fast switching, the second FET switch must draw a large current for a short time as the excess charge carriers are removed. In a phased-array antenna, it is difficult to locate defective components, and very difficult to locate a driver circuit/diode combination suffering from low switching speed. A monitor circuit includes a voltage divider which in effect translates the diode voltage to an input terminal of an EXOR gate. The control signal is applied to the second input terminal. The EXOR produces a fault indicative level for a short time after a transition of the control signal. A strobe timed to occur during this interval latches the fault indicative signal and the latched level is sent to a central monitor location and also lights a lamp at the module in which the defect occurs.
摘要翻译： 移相器使用在开关模式下工作的PIN二极管或二极管对来切换用于移相射频或微波信号的传输线元件。 每个二极管的驱动电路包括由双电平控制信号的第一电平控制的FET开关，以施加B +以使正向电流对二极管进行正向偏置。 当正向偏置时，二极管的有源区域变得充满电荷载流子。 第一FET开关通过二级控制信号的第二电平关闭，第二FET开关导通，向二极管施加反向偏置电压，使其不导通。 在二极管变为非导通之前，必须将多余的电荷载流子从二极管中扫出。 为了实现快速切换，第二个FET开关必须在多余的电荷载体被去除的情况下短时间吸取大电流。 在相控阵天线中，难以定位有缺陷的部件，并且非常难以定位具有低切换速度的驱动电路/二极管组合。 监视器电路包括分压器，其实际上将二极管电压转换到EXOR门的输入端。 控制信号被施加到第二输入端。 EXOR在控制信号转换后短时间产生故障指示电平。 在该间隔期间定时发生的选通脉冲锁存故障指示信号，并且锁存电平被发送到中央监视器位置，并且还在发生缺陷的模块处点亮灯。
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公开(公告)号：US4382237A
公开(公告)日：1983-05-03
申请号：US272396
申请日：1981-06-10
摘要： A flux drive gyromagnetic system such as a gyromagnetic waveguide phase shifter is temperature compensated by measuring the flux change in the gyromagnetic material during a reverse in saturation magnetization, comparing that change to the change under reference conditions and modifying the drive used to set the gyromagnetic material to a non-saturated condition in accordance with the results of the comparison.
摘要翻译： 通过在饱和磁化反向期间测量回旋磁性材料中的磁通量变化来对诸如陀螺磁波波导相移器之类的磁通驱动回旋磁系统进行温度补偿，将该变化与参考条件下的变化进行比较，并修改用于设置回旋磁材料的驱动 根据比较结果达到非饱和状态。
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公开(公告)号：US4366446A
公开(公告)日：1982-12-28
申请号：US199599
申请日：1980-10-22
CPC分类号： H03F1/34 , H03F1/083 , H03F1/3211 , H03F3/45
摘要： A resistor inserted between the collector of a common emitter transistor in a cascode amplifier and the emitter of the ensuing common base-amplifier transistor in conjunction with an operational amplifier responds to the collector current of the common emitter transistor to develop a degenerative-feedback-voltage signal for application to its emitter-base circuit.
摘要翻译： 插入在共源共栅放大器中的共同发射极晶体管的集电极和随后的公共基础放大器晶体管的发射极结合运算放大器之间的电阻器响应于共发射极晶体管的集电极电流，以产生退化反馈电压 信号用于其发射极基极电路。
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