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1. 发明授权

US3932814A Heterodyne receiver system 失效
标题翻译：外差接收机系统
公开(公告)号：US3932814A
公开(公告)日：1976-01-13
申请号：US471635
申请日：1974-05-20
申请人： Shoji Niki
发明人： Shoji Niki
IPC分类号： H03J7/18 , G01R23/14 , H03J3/14 , H03J7/28 , H04B1/06 , H04B1/26 , H04B1/36
CPC分类号： H03J7/28 , H03J3/14
摘要： An input signal and a local oscillator signal are supplied to a harmonic mixer. The local oscillator signal is swept over a frequency range. The output from the harmonic mixer is supplied to an intermediate frequency filter having a preselected frequency response, which provides an output signal when the difference formed by subtracting one of the input signal frequency and one harmonic frequency of the local oscillator signal from the other is equal to the intermediate frequency or when the difference formed by subtracting the other frequency from said one frequency is equal to the intermediate frequency as the local oscillator frequency is swept. By choosing a time interval between the times when the pair of intermediate frequency output signals are obtained, the order of that harmonic of the local oscillator signal with which the intermediate frequency output signal is obtained is determined depending on the frequency of the input signal. Thus, with a chosen time interval, when the frequency sweep of the local oscillator signal is interrupted with the later occurring one of the pair of the intermediate frequency output signals, the frequency of the local oscillator permits, together with the order of selected harmonic which corresponds to the chosen time interval and the direction of the frequency sweep, the frequency of the input signal to be determined. By using a definite time interval between the pair of intermediate frequency signals obtained and adjusting the rate of the frequency sweep, the order of the harmonic which is effective to obtain the intermediate frequency signals can be varied.
摘要翻译：输入信号和本地振荡器信号被提供给谐波混频器。本地振荡器信号在频率范围内扫描。来自谐波混频器的输出被提供给具有预选频率响应的中频滤波器，当通过从另一个减去本地振荡器信号的输入信号频率和一个谐波频率之一而形成的差异时，该中频滤波器提供输出信号当通过从所述一个频率中减去另一个频率而形成的差值等于本地振荡器频率被扫描时的中间频率。通过选择获得一对中频输出信号的时间之间的时间间隔，可以根据输入信号的频率确定获得中频输出信号的本地振荡器信号的谐波的次序。因此，以所选择的时间间隔，当本地振荡器信号的频率扫描被中频一对中频输出信号中的稍后出现时，本地振荡器的频率与所选谐波的顺序一起允许对应于所选择的时间间隔和频率扫描的方向，即要确定的输入信号的频率。通过使用所获得的一对中频信号之间的确定的时间间隔并且调整频率扫描的速率，可以改变有效获得中频信号的谐波的阶数。

2. 发明授权

US3649920A Buffered microsweep receiver 失效
标题翻译：缓冲MICROSWEEP接收器
公开(公告)号：US3649920A
公开(公告)日：1972-03-14
申请号：US3649920D
申请日：1969-12-18
申请人： SCOPE INC
发明人： WILLIAMS RICHARD E , GARTZKE FRED J
IPC分类号： H03J7/32 , H04B1/00 , H04B1/36
CPC分类号： H03J7/32
摘要： A frequency measuring receiver which takes a captured RF pulse or a plurality of pulses and stretches them into a train of closely spaced pulses by means of a recirculating delay-line loop. The pulses in the loop are scanned by a voltage tuned oscillator and presented to a panoramic display device.
摘要翻译：采用捕获的RF脉冲或多个脉冲并通过循环延迟线环将它们延伸到紧密间隔的脉冲列的频率测量接收机。环路中的脉冲由电压调谐振荡器扫描并呈现给全景显示设备。

3. 发明授权

US3584305A Frequency control system for receiver with heterodyne preselector 失效
标题翻译：用于接收器的频率控制系统
公开(公告)号：US3584305A
公开(公告)日：1971-06-08
申请号：US3584305D
申请日：1968-09-19
申请人： CIT ALCATEL
发明人： LEOSTIC JOSEPH , BABANY LUCIEN , BASTIDE PAUL
IPC分类号： H03B1/00 , H03B1/04 , H03B21/02 , H03D7/16 , H04B1/36
CPC分类号： H03D7/163 , H03B21/02 , H03B2201/0208 , H03B2202/027
摘要： Receiver with a heterodyne preselector fed by a first local oscillator, oscillator, and a frequency converter having a manually controllable second local oscillator. In order to maintain the desired relation between the frequencies of the two local oscillators, the output signals therefrom are intermodulated and the frequency of the resulting signal maintained in a corresponding desired range of frequency by means of a circuit which, according to the value of the frequency of the resulting signal, (i) initiates a frequency sweep of the first local oscillator (ii) causes this frequency to be increased by a predetermined amount or (iii) causes this frequency to be decreased by a predetermined amount.

4. 发明授权

US3449749A Electromagnetic surveillance system 失效
标题翻译：电磁监视系统
公开(公告)号：US3449749A
公开(公告)日：1969-06-10
申请号：US3449749D
申请日：1968-06-24
申请人： WILLIAM J MCEVOY
发明人： MCEVOY WILLIAM J
IPC分类号： H03J7/32 , G01S5/02 , G01R23/16 , H04B1/36
CPC分类号： H03J7/32

5. 发明授权

US3801914A Priority-frequency system for a signal-seeking receiver 失效
标题翻译：用于信号接收机的优先频率系统
公开(公告)号：US3801914A
公开(公告)日：1974-04-02
申请号：US3801914D
申请日：1972-06-27
申请人： GEN RES ELECTRONICS INC
发明人： IMAZEKI K
IPC分类号： H03J5/24 , H03J7/18 , H04B1/36
CPC分类号： H03J7/18 , H03J5/246
摘要： A priority-frequency system is provided for a signal-seeking receiver to automatically tune the receiver to a priority signal whenever it is received. During non-priority receiver operation, a scanning circuit causes the receiver to automatically scan a plurality of predetermined frequencies and tune to a received signal having a frequency corresponding to one of the predetermined frequencies. The priority system includes an astable switching circuit for periodically overriding the scanning circuit to tune the receiver to a priority frequency which is selected from the predetermined frequencies by a manual switch. When a priority signal is received, a control circuit stops the astable switching means so that the receiver is automatically tuned to the priority station whenever a signal of that frequency is received.
摘要翻译：提供了一种优先频率系统，用于信号寻求接收机，无论何时接收到接收机，都会自动将接收机调谐到优先级信号。在非优先接收机操作期间，扫描电路使得接收机自动扫描多个预定频率并调谐到具有对应于预定频率之一的频率的接收信号。该优先系统包括一个不稳定的切换电路，用于周期性地覆盖扫描电路，以将接收机调谐到通过手动开关从预定频率中选出的优先频率。当接收到优先级信号时，控制电路停止不可切换的切换装置，以便每当接收到该频率的信号时，接收机被自动调谐到优先站。

6. 发明授权

US3600685A Apparatus and method for interfering with radio communications 失效
标题翻译：干扰无线电通信的装置和方法
公开(公告)号：US3600685A
公开(公告)日：1971-08-17
申请号：US3600685D
申请日：1969-03-20
申请人： ITEK CORP
发明人： DOYLE WILLIAM C
IPC分类号： H04K3/00 , H04B1/36
CPC分类号： H04K3/68
摘要： Interfering with the radio communication between a transmitter and one or more receivers using the communication itself to destroy the intelligibility of the communication to the intended recipient. The communication is intercepted during one portion of a duty cycle and delayed by various different amounts. Thereafter, the differently delayed communications are added to form an unintelligible signal which is transmitted during the other portion of the duty cycle for reception by the intended recipient.

7. 发明授权

US3495175A Automatic channel selection system for a multichannel communication system 失效
标题翻译：用于多通道通信系统的自动通道选择系统
公开(公告)号：US3495175A
公开(公告)日：1970-02-10
申请号：US3495175D
申请日：1967-07-19
申请人： MOORE ASSOCIATES INC
发明人： MUNCH EDVARD
IPC分类号： H04B7/08 , H04B1/36
CPC分类号： H04B7/082

8. 发明授权

US3467866A Composite intermodulation spectra signature recorder 失效
标题翻译：复合互调谱签名记录仪
公开(公告)号：US3467866A
公开(公告)日：1969-09-16
申请号：US3467866D
申请日：1966-08-31
申请人： PALATINUS ANTHONY C
发明人： PALATINUS ANTHONY C
IPC分类号： G01R29/06 , H04B1/16 , H04B1/36
CPC分类号： G01R29/06

9. 发明授权

US4009440A Radio receiver 失效
标题翻译：无线接收器
公开(公告)号：US4009440A
公开(公告)日：1977-02-22
申请号：US60815975
申请日：1975-08-27
申请人： SANYO ELECTRIC CO
发明人： OKADA HISAO , OYABE HIDEO , AKITA ISAO
IPC分类号： H03J1/04 , H03J7/18 , H04B1/36
CPC分类号： H03J7/18 , H03J1/047

10. 发明授权

US3676781A Audio frequency indicator for scan tuned radio receiver 失效
标题翻译：用于扫描无线电接收机的音频频率指示器
公开(公告)号：US3676781A
公开(公告)日：1972-07-11
申请号：US3676781D
申请日：1970-12-29
申请人： GEN ELECTRIC
发明人： WORCESTER JOSEPH A
IPC分类号： H03J3/12 , H03J3/18 , H04B1/36
CPC分类号： H03J3/12 , H03J3/185
摘要： An audible frequency indicator for use in a radio receiver employing automatic frequency scan tuning. A variable scan control signal, corresponding to the frequency location of the scan within a given frequency band is applied to a voltage controlled oscillator. The voltage controlled oscillator produces an output in the audible range, whose pitch is a function of the frequency location of the scan, and that is terminated when a station is tuned in.
摘要翻译：用于使用自动频率扫描调谐的无线电接收机中的可听频率指示器。对应于给定频带内的扫描的频率位置的可变扫描控制信号被施加到压控振荡器。压控振荡器在可听范围内产生输出，其音调是扫描频率位置的函数，并且当站被调谐时终止。

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