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51. 发明授权

US4127819A Frequency discriminator apparatus 失效
标题翻译：鉴频装置
公开(公告)号：US4127819A
公开(公告)日：1978-11-28
申请号：US631708
申请日：1975-11-13
申请人： William J. Keane
发明人： William J. Keane
IPC分类号： H03D3/00 , H03D9/04 , H04B1/16 , H03B3/08
CPC分类号： H03D3/00 , H03D9/04
摘要： A frequency discriminator having a bandwidth variable from a relatively narrow range to a very wide range in which the center frequency is simultaneously tunable over an extremely wide frequency range. The discriminator is insensitive to amplitude variations of the input signal and is capable of demodulating low level signals. The frequency discriminator is particularly useful for microwave frequency applications wherein the basic discriminator element is a ferrimagnetic resonator. The frequency discriminator forms a portion of several preferred embodiments including devices for the frequency control of signal sources, frequency measurement of signal sources, demodulation of frequency modulated signals and frequency tracking control for other ferrimagnetic devices.
摘要翻译：频率鉴别器具有从相对狭窄的范围变化到非常宽的范围的带宽，其中中心频率在极宽的频率范围内同时可调。鉴频器对输入信号的幅度变化不敏感，并且能够解调低电平信号。鉴频器对于微波频率应用特别有用，其中基本鉴频器元件是亚铁磁共振器。鉴频器形成几个优选实施例的一部分，包括用于信号源的频率控制，信号源的频率测量，频率调制信号的解调和其他亚铁磁装置的频率跟踪控制的装置。

52. 发明授权

US3949314A Phase demodulator 失效
标题翻译：相位解调器
公开(公告)号：US3949314A
公开(公告)日：1976-04-06
申请号：US519028
申请日：1974-10-29
申请人： Yukihiko Machida
发明人： Yukihiko Machida
IPC分类号： H03D3/02 , H03D3/00 , H03D3/18 , H03D3/24 , H03D13/00 , H03K9/04
CPC分类号： H03D3/242 , H03D3/00 , H03D3/18
摘要： A reference carrier signal is combined with a phase modulated signal of the same basic frequency to generate an output signal the amplitude of which varies in accordance with the phase difference between the phase modulated signal and the reference carrier. The permissible modulation angle is increased by vectorally adding the phase modulated signal with a reference signal having a phase different from the comparison reference carrier. The vector sum signal is amplitude-limited so that the signal produced by the comparison will only be responsive to phase angle and not amplitude.
摘要翻译：参考载波信号与相同基本频率的相位调制信号组合以产生其幅度根据相位调制信号和参考载波之间的相位差而变化的输出信号。通过使用具有与比较参考载波不同的相位的参考信号对相位调制信号进行向量相加来增加允许的调制角度。矢量和信号受到幅度限制，使得由比较产生的信号将仅响应于相位角而不是幅度。

53. 发明授权

US3786283A Delay circuit for providing a variable delay characteristic 失效
标题翻译：延迟电路提供可变延迟特性
公开(公告)号：US3786283A
公开(公告)日：1974-01-15
申请号：US3786283D
申请日：1971-12-29
申请人： SANSUI ELECTRIC CO
发明人： IIDA H
IPC分类号： H03D3/00 , H03F3/191 , H03H11/20 , H03K17/26
CPC分类号： H03H11/20 , H03D3/00 , H03D3/001 , H03F3/191 , H03F2203/45621
摘要： A delay circuit consists of a Toulon circuit one branch of which is a reactance circuit having at least one resonance point and one anti-resonance point wherein the resonance and anti-resonance points are chosen to provide a desired delay characteristic.
摘要翻译：延迟电路由土壤电路组成，其一个支路是具有至少一个共振点和一个反共振点的电抗电路，其中谐振点和反共振点被选择以提供期望的延迟特性。

54. 发明授权

US3654488A Circuit arrangement for limiting amplitude modulation in a frequency modulated signal 失效
标题翻译：用于限制频率调制信号中振幅调制的电路布置
公开(公告)号：US3654488A
公开(公告)日：1972-04-04
申请号：US3654488D
申请日：1970-11-18
申请人： GRUNDIG E M V ELECKTRO MECHANI
发明人： TRAUB KARL , BENECKE GUNTHER
IPC分类号： H03D3/00 , H03G11/06 , H03K5/08 , H04B1/10
CPC分类号： H03D3/00 , H03D3/002 , H03G11/06
摘要： A first transistor stage has a tuned output circuit. A coil coupled to the tuned output circuit has, in parallel with it, a series circuit of a resistance and a pair of diodes connected in parallel but with opposite polarity. Terminal of the resistance not connected to the pair of diodes may be connected to the top of the coupling coil via a resistance and is connected to the base of the subsequent transistor stage.
摘要翻译：第一晶体管级具有调谐输出电路。耦合到调谐输出电路的线圈与其并联具有并联连接但具有相反极性的电阻和一对二极管的串联电路。未连接到一对二极管的电阻的端子可以经由电阻连接到耦合线圈的顶部，并且连接到后续晶体管级的基极。

55. 发明授权

US3473132A Digital demodulator 失效
标题翻译：数字解调器
公开(公告)号：US3473132A
公开(公告)日：1969-10-14
申请号：US3473132D
申请日：1967-07-27
申请人： IBM
发明人： KEELER ROBERT E , FREEMAN DON G , BLERKOM RICHARD VAN
IPC分类号： H04B1/10 , H03D3/00 , H03D5/00
CPC分类号： H03D3/006 , H03D3/00 , H03D2200/005 , H03D2200/006

56. 发明授权

US3348168A Fm/am converters 失效
标题翻译： Fm / am转换器
公开(公告)号：US3348168A
公开(公告)日：1967-10-17
申请号：US41481464
申请日：1964-11-30
申请人： CFT COMP FSE TELEVISION
发明人： GERARD MELCHIOR , PIERRE CASSAGNE
IPC分类号： H04N11/20 , H03C1/50 , H03D3/00 , H03D3/02 , H04N11/22
CPC分类号： H03D3/00 , H03C1/50 , H03D3/02 , H04N11/22

57. 发明授权

US3256489A Amplitude dependent zero shift reduction for frequency discriminators 失效
标题翻译：用于频率鉴别器的幅度相关零移减少
公开(公告)号：US3256489A
公开(公告)日：1966-06-14
申请号：US25090463
申请日：1963-01-11
申请人： RCA CORP
发明人： ROGERS GORDON F
IPC分类号： H01G4/22 , H03D3/00 , H03D3/08
CPC分类号： H03D3/00 , H01G4/22 , H01G4/221 , H03D3/08 , H03D2200/0086

58. 发明授权

US3172053A Balanced frequency detector circuit 失效
标题翻译：平衡频率检测电路
公开(公告)号：US3172053A
公开(公告)日：1965-03-02
申请号：US8463261
申请日：1961-01-24
申请人： HAZELTINE RESEARCH INC
发明人： RONZHEIMER STEPHEN P
IPC分类号： H03D3/00 , H04B14/08 , H04H20/88 , H04J1/20
CPC分类号： H04H20/88 , H03D3/00 , H04B14/08 , H04J1/20

59. 发明授权

US2947863A Linear discriminators or the like 失效
标题翻译：线性鉴别器等
公开(公告)号：US2947863A
公开(公告)日：1960-08-02
申请号：US41691254
申请日：1954-03-17
申请人： HOFFMAN ELECTRONICS CORP
发明人： BUIE JAMES L
IPC分类号： H03D3/00
CPC分类号： H03D3/00

60. 发明授权

US2647992A Frequency stabilized radio receiving system 失效
标题翻译：频率稳定无线电接收系统
公开(公告)号：US2647992A
公开(公告)日：1953-08-04
申请号：US6329248
申请日：1948-12-03
申请人： GEN ELECTRIC
发明人： DOME ROBERT B
IPC分类号： H03D3/00 , H04B1/26
CPC分类号： H03D3/00 , H04B1/26

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