公开(公告)号：US4745376A

公开(公告)日：1988-05-17

申请号：US11802

申请日：1987-02-06

申请人： Robert J. Aleksa ,  Carl L. Shore ,  Richard Hobby

发明人： Robert J. Aleksa ,  Carl L. Shore ,  Richard Hobby

IPC分类号： H03B5/32

CPC分类号： H03B5/32 ,  H03B2200/0012

摘要： An oscillator having a multiplicity of resonant structures parallel coupled to form a fault tolerant resonator in the feedback circuit of the oscillator. This fault tolerant resonator permits the oscillator to operate in a near fault free manner after the failure of one or more of the resonant structures.

公开(公告)号：US5003195A

公开(公告)日：1991-03-26

申请号：US322489

申请日：1989-03-10

申请人： Desi Stelling ,  Robert J. Aleksa ,  Nicholas J. Wilt

发明人： Desi Stelling ,  Robert J. Aleksa ,  Nicholas J. Wilt

IPC分类号： H03K4/94 ,  H03K17/66

CPC分类号： H03K17/66 ,  H03K4/94

摘要： A capacitor is charged and discharged through switch selectable resistors from regulated DC voltage supplies and clamping diodes to provide the bias signal to control the rise and fall times of the RF output pulse of a PIN diode attenuator. An isolation buffer isolates charging and discharging transients from the bias signal. An adjustable AC gain and adjustable DC offset inverting amplifier provides the isolation buffered signal to a high impedance, very low output AC impedance source for driving the bias input of the PIN diode attenuator. The DC offset is provided by an adjustable regulated voltage source coupled to the inverting amplifier.

摘要翻译： 电容器通过可调节的直流电压源和钳位二极管的开关选择电阻进行充电和放电，以提供偏置信号来控制PIN二极管衰减器的RF输出脉冲的上升和下降时间。 隔离缓冲器隔离偏置信号的充电和放电瞬变。 可调的交流增益和可调直流偏移反相放大器将隔离缓冲信号提供给高阻抗，非常低的输出AC阻抗源，用于驱动PIN二极管衰减器的偏置输入。 DC偏移由耦合到反相放大器的可调节稳压电源提供。