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1. 发明授权

US11621701B2 Filter that minimizes in-band noise and maximizes detection sensitivity of exponentially-modulated signals 有权
公开(公告)号：US11621701B2
公开(公告)日：2023-04-04
申请号：US17333931
申请日：2021-05-28
申请人： DYNASPOT CORP.
发明人： Marvin L. Sassler , Alan T. Sassler
IPC分类号： H03H17/02 , H03H7/06 , H03D3/26 , H04B1/16
摘要： Trans-filter/Detectors are extremely sensitive circuits that recover exponentially modulated signals buried in noise. They can be used wherever Matched Filter/Coherent Detectors are used and operate at negative input signal-to-noise ratios to recover RADAR, SONAR, communications, or data signals, as well as reduce phase noise of precision oscillators. Input signal and noise is split into two paths where complementary derivatives are extracted. Outputs of the two paths are equal in amplitude and 180 degrees relative to each other at the band center frequency. The outputs are summed, causing stationary in-band noise to be reduced by cancellation while exponentially modulated signals are undiminished. Trans-filters are Linear Time Invariant circuits, have no noise x noise threshold and can be cascaded, increasing output signal-to-noise ratio prior to detection. Trans-filters are most sensitive to all types of digital modulation, producing easily detected polarized pulses synchronous with data transitions. Trans-filters do not require coherent conversion oscillators and complex synchronizing circuits.

2. 发明授权

US5847620A Dielectric resonator phase shifting frequency discriminator 失效
标题翻译：介质谐振器相移鉴频器
公开(公告)号：US5847620A
公开(公告)日：1998-12-08
申请号：US789815
申请日：1997-01-28
申请人： Thomas T. Y. Wong , Thomas D. Nagode , Sabah Khesbak
发明人： Thomas T. Y. Wong , Thomas D. Nagode , Sabah Khesbak
IPC分类号： H03D1/10 , H03D3/26 , H03D9/04 , H03L7/02
CPC分类号： H03D9/04 , H03D1/10 , H03D2200/0003 , H03D3/26
摘要： A dielectric resonator frequency discriminator comprising a microstrip, a single mode dielectric resonator coupled to the microstrip, at least one detector for detecting an RF signal coupled to the microstrip and an RF input for introducing an RF signal coupled to the microstrip.
摘要翻译：介质谐振器频率鉴别器包括微带，耦合到微带的单模介质谐振器，用于检测耦合到微带的RF信号的至少一个检测器和用于引入耦合到微带的RF信号的RF输入。

3. 发明授权

US4814718A Microwave discriminator and demodulator/receiver using the same 失效
标题翻译：微波鉴频器和解调器/接收机使用相同
公开(公告)号：US4814718A
公开(公告)日：1989-03-21
申请号：US82616
申请日：1987-08-07
申请人： Lazare Argintaru , Denis Hebrard
发明人： Lazare Argintaru , Denis Hebrard
IPC分类号： H03D3/26 , H01P7/10 , H03D9/04 , H03D3/00
CPC分类号： H03D9/04 , H01P7/10
摘要： A microwave frequency discriminator, i.e. an electronic device for directly transforming frequency modulation on a microwave carrier into a demodulated lower frequency signal. The discriminator is similar to a Travis discriminator and includes an inlet microstrip line, two resonant circuits (R.sub.1, R.sub.2) constituted by dielectric resonators and coupled to said inlet microstrip line to receive the modulated microwave signal, two outlet microstrip lines coupling each resonator to a respective microwave detector circuit, said detector circuits including loads (r.sub.1, r.sub.2) in series-opposition in the manner of a Travis discriminator. The microwave frequency discriminator can be used in a demodulator and/or receiver for frequency modulated microwaves.
摘要翻译：一种微波鉴频器，即用于将微波载波上的频率调制直接变换为解调的较低频率信号的电子设备。鉴别器与Travis识别器相似，包括一个入口微带线，由介质谐振器构成的两个谐振电路（R1，R2），耦合到所述入口微带线以接收经调制的微波信号，两个出口微带线将每个谐振器耦合到相应的微波检测器电路，所述检测器电路包括以Travis鉴别器的方式串联对置的负载（r1，r2）。微波鉴频器可用于用于调频微波的解调器和/或接收器。

4. 发明授权

US4342000A FM Detecting circuit 失效
标题翻译： FM检测电路
公开(公告)号：US4342000A
公开(公告)日：1982-07-27
申请号：US135149
申请日：1980-03-28
申请人： Minoru Ogita
发明人： Minoru Ogita
IPC分类号： H03D3/10 , H03D3/22 , H03D3/14 , H03D3/26
CPC分类号： H03D3/22 , H03D3/10 , H03D2200/0009 , H03D2200/0049 , H03D2200/0082 , H03D2200/0088
摘要： In an FM detecting circuit of either the ratio detecting circuit type or the quadrature detecting circuit type arranged to have an LC resonance circuit and to detect the amount of deviation of an FM input signal relative to the resonance frequency by utilizing the resonance characteristic of the LC resonance circuit in the vicinity of the resonance frequency to thereby perform FM detection, a semiconductor element is connected to the LC resonance circuit to expand the rectilinear region of the resonance characteristic and to reduce detecting distortions.
摘要翻译：在布置成具有LC谐振电路的比率检测电路类型或正交检测电路类型的FM检测电路中，并且通过利用LC的谐振特性来检测FM输入信号相对于谐振频率的偏差量在谐振频率附近的谐振电路，从而进行FM检测，半导体元件连接到LC谐振电路，以扩大谐振特性的直线区域，并减少检测失真。

5. 发明授权

US4150338A Frequency discriminators 失效
标题翻译：频率鉴别器
公开(公告)号：US4150338A
公开(公告)日：1979-04-17
申请号：US897033
申请日：1978-04-17
申请人： Merle V. Hoover
发明人： Merle V. Hoover
IPC分类号： H03D3/08 , H03D3/26
CPC分类号： H03D3/08 , H03D3/26
摘要： An input signal comprising a carrier wave whose frequency may vary is applied to two complementary conductivity type transistors. Two resonant circuits, one tuned to a frequency slightly higher than and the other tuned to a frequency slightly lower than that of the nominal center frequency of the carrier wave are coupled between the respective drain electrodes of these transistors and a circuit node. The voltages developed across these resonant circuits are detected and the detection components subtracted from one another to obtain the circuit output signal.
摘要翻译：包括其频率可能变化的载波的输入信号被施加到两个互补导电型晶体管。两个谐振电路被调谐到稍高于另一个被调谐到比载波的标称中心频率稍低的频率的频率上，耦合在这些晶体管的相应漏电极和电路节点之间。检测在这些谐振电路之间产生的电压，并且将检测部件相互减去以获得电路输出信号。

6. 发明授权

US4079330A System for demodulating angle-modulated signals 失效
标题翻译：用于解调角度调制信号的系统
公开(公告)号：US4079330A
公开(公告)日：1978-03-14
申请号：US746336
申请日：1976-12-01
申请人： Yukinobu Ishigaki , Kohei Sasamura , Yasuo Itoh , Teruo Muraoka
发明人： Yukinobu Ishigaki , Kohei Sasamura , Yasuo Itoh , Teruo Muraoka
IPC分类号： G11B3/00 , H03D3/00 , H03D3/02 , H03D3/06 , H03D3/24 , H03D3/26 , H04H20/89 , H04S3/00 , H03D3/22
CPC分类号： H04H20/88 , H03D3/005 , H03D3/02 , H03D3/06 , H03D3/24 , H03D3/26 , H04H20/89
摘要： The inventive system demodulates angle-modulated signals. A tracking band-pass filter responds to an input angle-modulated wave signal. The tracking filter has a pass band with a center frequency controlled by a control signal. A first amplitude limiter limits the amplitude of the input angle-modulated wave signal. A differentiation circuit establishes a 90.degree. phase difference between a signal passing through the tracking band-pass filter and a signal passing through the amplitude limiter. A phase comparator responds to an input with the two signals with a 90.degree. phase difference therebetween and produces an output error signal in accordance with this phase difference. This output error signal is supplied as the control signal to the tracking band-pass filter. This output error signal is also passed through a low pass filter to produce the demodulated signal.
摘要翻译：本发明的系统解调角度调制信号。跟踪带通滤波器响应输入角度调制波信号。跟踪滤波器具有通过控制信号控制的中心频率的通带。第一幅度限制器限制输入角度调制波信号的幅度。差分电路在通过跟踪带通滤波器的信号和通过幅度限制器的信号之间建立90°的相位差。相位比较器响应输入，其中两个信号之间的相位差为90°，并根据该相位差产生输出误差信号。该输出误差信号作为控制信号提供给跟踪带通滤波器。该输出误差信号也通过低通滤波器以产生解调信号。

7. 发明授权

US3997797A Frequency discriminating circuit 失效
标题翻译：鉴频电路
公开(公告)号：US3997797A
公开(公告)日：1976-12-14
申请号：US645873
申请日：1975-12-31
申请人： Hiroshi Sahara , Yutaka Tanaka , Toshinobu Isobe
发明人： Hiroshi Sahara , Yutaka Tanaka , Toshinobu Isobe
IPC分类号： H03D3/08 , H03D3/10 , H04N9/64 , H04N11/18 , H03D3/26
CPC分类号： H03D3/08 , H04N11/186 , H04N5/44
摘要： A frequency discriminating circuit having a double tuned circuit with a transformer, which has a first and second resonant circuits. The first resonant circuit is composed of a capacitor, a primary winding of the transformer and a first variable inductance element and the second resonant circuit is composed of a capacitor, a secondary winding of the transformer and second and third variable inductance elements, wherein the quality factor Q of the second resonant circuit is much larger than that Q of the first resonant circuit. The center frequency of the frequency-response characteristic (so-called S characteristic) of the discriminating circuit can be adjusted by adjusting the second and third variable inductance elements and the linearity of the frequency response characteristic of the discriminating circuit can be adjusted by adjusting the first variable inductance element.
摘要翻译：一种具有带有变压器的双调谐电路的频率判别电路，其具有第一和第二谐振电路。第一谐振电路由电容器，变压器的初级绕组和第一可变电感元件组成，第二谐振电路由电容器，变压器的次级绕组和第二和第三可变电感元件组成，其中质量第二谐振电路的因子Q比第一谐振电路的Q大得多。鉴别电路的频率响应特性（所谓的S特性）的中心频率可以通过调节第二和第三可变电感元件来调节，并且可以通过调节判别电路的频率响应特性的线性来调节第一可变电感元件。

8. 发明授权

US3925733A Maximum pulse density detector 失效
标题翻译：最大脉冲密度检测器
公开(公告)号：US3925733A
公开(公告)日：1975-12-09
申请号：US47304974
申请日：1974-05-24
申请人： US NAVY
发明人： MOORE WAYNE E
IPC分类号： H03K5/1532 , H03K11/00 , H03K5/20 , H03D3/26
CPC分类号： H03K11/00 , H03K5/1532
摘要： An improved electronic circuit and technique for providing a trigger pulse synchronized with the maximum pulse density in a random pulse train. A frequency modulated pulse train having uniform amplitude pulses is delivered to an RC circuit which provides an output waveform having maximum amplitude at the highest input frequency or maximum pulse density. The waveform is passed through a smoothing filter and amplifier to more particularly define the waveform peak, and then to a peak detector where the point of maximum amplitude is sensed using a transistor sensing circuit. A pulse output from the transistor sensing circuit is electronically modified to produce an impulse trigger spike that corresponds to the point of maximum pulse density over a wide range of input conditions.
摘要翻译：一种用于在随机脉冲串中提供与最大脉冲密度同步的触发脉冲的改进的电子电路和技术。具有均匀幅度脉冲的调频脉冲串被传送到RC电路，RC电路提供在最高输入频率或最大脉冲密度下具有最大振幅的输出波形。波形通过平滑滤波器和放大器以更具体地定义波形峰值，然后通过晶体管感测电路检测最大幅度点。从晶体管感测电路输出的脉冲被电子修改以产生在宽范围的输入条件下对应于最大脉冲密度点的脉冲触发尖峰。

9. 发明授权

US3869676A Diode-quad bridge circuit means 失效
标题翻译：二极管四桥电路方式
公开(公告)号：US3869676A
公开(公告)日：1975-03-04
申请号：US46284474
申请日：1974-04-22
申请人： NASA
发明人： HARRISON DEAN R , DIMEFF JOHN
IPC分类号： G01R23/06 , G01R27/16 , H03D3/00 , H03D3/26 , H03D1/10
CPC分类号： H03D3/00 , G01R23/06 , G01R27/16 , H03D3/26
摘要： A transducer and frequency discriminator circuit including a four-terminal circulating diode bridge, a first pair of capacitors connected in series across two terminals of the bridge, and a second pair of capacitors, or other impedance elements, connected in series across the other two terminals of the bridge. A source of balanced alternating electrical energy for energizing the circuit is coupled between the commonly connected plates of the first pair of capacitors and the commonly connected plates of the second pair of capacitors. Due to the operation of the diode bridge, the sum of the resultant charges developed on the first pair of capacitors is proportional to the relationship between the respective capacitors of the second pair, and consequently, an output voltage taken across the first pair of capacitors will be proportional to that relationship.
摘要翻译：一种换能器和鉴频器电路，包括四端循环二极管桥，串联连接在桥的两个端子上的第一对电容器，以及第二对电容器或其它阻抗元件，串联连接在另外两个端子的桥梁。用于激励电路的平衡交流电能源耦合在第一对电容器的共同连接的板和第二对电容器的共同连接的板之间。由于二极管桥的操作，在第一对电容器上产生的合成电荷的总和与第二对电容器的各个电容器之间的关系成比例，因此跨越第一对电容器的输出电压将与这种关系成正比。

10. 发明授权

US3835422A Surface wave frequency discriminator 失效
标题翻译：表面波频率分辨器
公开(公告)号：US3835422A
公开(公告)日：1974-09-10
申请号：US32254473
申请日：1973-01-10
申请人： THOMSON CSF
发明人： HARTEMANN P
IPC分类号： H03D3/16 , H03H9/26 , H03D3/26
CPC分类号： H03D3/16
摘要： The present invention relates to frequency discriminators. The frequency discriminator in accordance with the invention comprises a pair of surface wave electromechanical filters deposited upon a single substrate; the spectral responses of the filters are offset in frequency and have a triangular profile so that by subtraction of the detected voltages at the output of these filters, an S characteristic is obtained.
摘要翻译：本发明涉及频率鉴别器。根据本发明的鉴频器包括沉积在单个衬底上的一对表面波机电滤波器; 滤波器的频谱响应在频率上偏移并且具有三角形轮廓，使得通过在这些滤波器的输出处减去检测到的电压，获得S特性。

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