公开(公告)号：EP0546734A1

公开(公告)日：1993-06-16

申请号：EP92310871.6

申请日：1992-11-27

Applicant: RAYTHEON COMPANY

Inventor： Bianchini, Michael J. ,  Lyons, Christopher T. ,  Michalik, Richard A. ,  Waterman, Raymond C. Jr.

IPC: H03B5/18

CPC classification number: H03L7/02 ,  H03B5/1841 ,  H03B5/1864 ,  H03B2200/0024 ,  H03B2200/0048 ,  H03B2200/0056 ,  H03B2200/0072 ,  H03B2200/0088 ,  H03B2200/009 ,  H03B2201/0258 ,  H03B2202/025 ,  H03B2202/076

Abstract: 5 n7 An oscillator (10) includes an amplifier (12) having an input and an output and a feedback circuit (14) disposed between the input and the output of the amplifier (12). The feedback circuit (14) includes a plurality of resonators (34) and a pair of switches (32,38). Each switch (32,38) includes a first port and multiple connectable ports, the multiple connectable ports of each switch (32,38) connected to a corresponding one of the plurality of resonators (34). The feedback circuit (14) further includes a voltage-controlled phase shifter (22) disposed in series with the switches (32,38). The oscillator (10) further includes a discriminator circuit (16), responsive to signals from the feedback circuit (14), for providing a control signal (52) to the voltage-controlled phase shifter (22) for degenerating low frequency noise within the oscillator (10). With such an arrangement, high Q low noise resonators can be switched in and out of the circuit thus providing improved phase noise performance at high power levels with the desirable frequency agility required for a microwave oscillator.

Abstract translation: 振荡器（10）包括具有输入和输出的放大器（12）和设置在放大器（12）的输入和输出之间的反馈电路（14）。 反馈电路（14）包括多个谐振器（34）和一对开关（32,38）。 每个开关（32,38）包括第一端口和多个可连接端口，每个开关（32,38）的多个可连接端口连接到多个谐振器（34）中的相应一个谐振器。 反馈电路（14）还包括与开关（32,38）串联布置的电压控制移相器（22）。 振荡器（10）还包括鉴别器电路（16），响应于来自反馈电路（14）的信号，用于向压控移相器（22）提供控制信号（52），用于将低频噪声 振荡器（10）。 通过这样的布置，可以将高Q低噪声谐振器切换到电路中，从而在具有微波振荡器所需要的频率灵活性的高功率电平下提供改进的相位噪声性能。