公开(公告)号：US3832653A

公开(公告)日：1974-08-27

申请号：US38961073

申请日：1973-08-20

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： NUGENT J ,  CLAYPOOL H

IPC: H03B5/32 ,  H03B1/00 ,  H03B5/36

CPC classification number: H03B5/36 ,  H03B2200/0034 ,  H03B2200/007 ,  H03B2200/0088 ,  H03B2201/018

Abstract: A signal generator for generating a high power low noise RF signal is disclosed. The generator includes a low noise crystal control oscillator for generating a relatively low power, low noise RF signal. The output signal of the oscillator is coupled to a high power RF amplifier which amplifies this signal to generate the low noise high power RF signal. The low frequency noise of the oscillator is reduced by a low frequency negative feedback loop in the oscillator circuit. Noise induced into the oscillator circuit by load changes in the power amplifier is reduced by designing the amplifier such that its input impedance is substantially constant for all phase angles of the RF signal. The operating frequency of the generator may be changed by switching the crystal which determines the operating frequency of the oscillator. The bandwidth of the oscillator and the amplifier are such that the operating frequency of the oscillator can be changed over a relatively wide range without circuit readjustments.

Abstract translation: 公开了一种用于产生高功率低噪声RF信号的信号发生器。 发生器包括用于产生相对低功率，低噪声RF信号的低噪声晶体控制振荡器。 振荡器的输出信号耦合到高功率RF放大器，放大该信号以产生低噪声高功率RF信号。 振荡器电路中的低频负反馈环路降低了振荡器的低频噪声。 通过设计放大器使得其输入阻抗对于RF信号的所有相位角基本上是恒定的而减小了通过功率放大器中的负载变化而引入到振荡器电路中的噪声。

公开(公告)号：US3808528A

公开(公告)日：1974-04-30

申请号：US29224272

申请日：1972-09-25

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： NUGENT J ,  CLAYPOOL H

IPC: G01R29/06 ,  G01R23/16

CPC classification number: G01R29/06

Abstract: A system for analyzing an RF signal to determine the noise and modulation components of the signal is disclosed there. The system is capable of analyzing an unknown signal to determine the random AM, FM and PM noise components as well as the intentional AM, FM and PM modulation components. The system includes a phase lock loop through which controls the frequency of a signal which is mixed with the signal to be analyzed such that the resulting signal is within a frequency band which can be easily analyzed.

Abstract translation: 公开了一种用于分析RF信号以确定信号的噪声和调制分量的系统。 该系统能够分析未知信号以确定随机AM，FM和PM噪声分量以及有意的AM，FM和PM调制分量。 该系统包括锁相环，通过该锁相环控制与要分析的信号混合的信号的频率，使得所得到的信号在易于分析的频带内。

公开(公告)号：US3775698A

公开(公告)日：1973-11-27

申请号：US3775698D

申请日：1972-08-04

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： NUGENT J ,  CLAYPOOL H

IPC: H03B1/00 ,  H03B5/12 ,  H03L5/00 ,  H03B3/02

CPC classification number: H03L5/00 ,  H03B5/1203 ,  H03B5/1228 ,  H03B5/1243 ,  H03B2200/004 ,  H03B2201/0208

Abstract: An RF signal generator is disclosed which has low AM and FM noise and high power output. The output signal of the RF signal generator is a variable over an octave in response to a tuning voltage signal. The RF signal generator includes a low noise RF oscillator coupled to a limiter circuit through a first buffer amplifier. A second buffer amplifies the output of the limiter circuit to produce a high level RF output signal. The FM noise is reduced to a low value by a high Q resonant circuit which determines the frequency of the oscillator and by the use of components in the oscillator circuit which have low noise characteristics. The AM noise is further reduced by the limiter and the output of the limiter is amplified by a second buffer to produce a high power low noise RF signal.

Abstract translation: 公开了具有低AM和FM噪声以及高功率输出的RF信号发生器。 响应于调谐电压信号，RF信号发生器的输出信号是八度以上的变量。 RF信号发生器包括通过第一缓冲放大器耦合到限幅器电路的低噪声RF振荡器。 第二缓冲器放大限幅器电路的输出以产生高电平RF输出信号。 通过高Q谐振电路将FM噪声降低到较低的值，该谐振电路确定振荡器的频率以及通过使用具有低噪声特性的振荡器电路中的组件。 通过限幅器进一步降低AM噪声，并且限制器的输出由第二缓冲器放大以产生高功率低噪声RF信号。

公开(公告)号：US3716785A

公开(公告)日：1973-02-13

申请号：US3716785D

申请日：1971-06-22

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： MASTERS H ,  PETERS J ,  NUGENT J ,  HUNT M

IPC: G01R23/00 ,  G01R27/00

CPC classification number: G01R23/00

Abstract: APPARATUS FOR MEASURING NOISE SPECUTRA, BOTH AM (AMPLITUDE MODULATION) AND FM (FREQUENCY MODULATION), OF RF SIGNALS OVER A PREDETERMINED FREQUENCY RANGE BY SWEEPING A VARIABLE FREQUENCY SQUARE WAVE OSCILLATOR BY MEANS OF AN ANALOG RAMP SIGNAL GENERATED BY A DIGITAL SWEEPING CIRCUIT WHICH PRODUCES A SEQUENCE OF SQUARE WAVE PULSES WHOSE PULSE WIDTH INCREMENTALLY INCREASES BY THE SAME AMOUNT OVER A PREDETERMINED TIME PERIOD. THE VARIABLE FREQUENCY OSCILLATOR IS DRIVEN AND AUTOMATIC FREQUENCY CONTROLLED FROM A DIGITAL CLOCK OSCILLATOR WHICH IS ALSO FED TO A MIXER. THE MIXER IS DIRECTLY COUPLED TO A FIRST MIXER WHICH HAS INPUTS COMPRISING THE NOISE SIGNAL INPUT AND THE VARIABLE FREQUENCY OSCILLATOR SIGNAL APPLIED THERETO. THE FIRST AND SECOND MIXER CONFIGURATION PROVIDES A FREQUENCY WINDOW THROUGH WHICH THE DESIRED NOISE WAVEFORM CAN BE DETECTED AND MEASURED. THE SYSTEM SWEEPS A PREDETERMINED FREQUENCY BAND AND WHEN A NOISE SIGNAL OF PREDETERMINED AMPLITUDE IS DETECTED, THE SWEEP CIRCUIT IS AUTOMATICALLY STOPPED, THEREBY LOCKING ONTO AN INPUT SIGNAL OF EXCESSIVE NOISE LEVEL.