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1. 发明公开

EP0137462A3 Integrated filter circuit 失效
标题翻译：集成滤波电路
公开(公告)号：EP0137462A3
公开(公告)日：1986-10-08
申请号：EP84111944
申请日：1984-10-05
申请人： HITACHI, LTD.
发明人： Miura, Kuniaki , Fukushima, Isao , Okada, Yoshinori , Kudo, Mitsuru , Kubota, Takashi
IPC分类号： H03H11/12 , H03J07/02 , H03J05/24
CPC分类号： H03H11/04 , H03H11/1295
摘要： An integrated filter circuit including at least integrated resistances (R1 to R6) and integrated capacitances (C1 to C6), said integrated filter circuit comprising a plurality of filter circuits (2, 3) connected in parallel and in which at least either resistance values or capacitance values are different, a switch (4, 5) for switching said parallel filter circuits (2, 3), and means for controlling said switch to select one of said parallel filter circuits (2, 3).

2. 发明公开

EP0219338A3 Digital color signal processing circuit 失效
标题翻译：数字彩色信号处理电路
公开(公告)号：EP0219338A3
公开(公告)日：1988-12-21
申请号：EP86307914
申请日：1986-10-14
申请人： VICTOR COMPANY OF JAPAN, LIMITED
发明人： Ozaki, Hidetoshi
IPC分类号： H03D07/16 , H03J07/02 , H04N09/83
CPC分类号： H03D7/163 , H03B21/02 , H03J7/02 , H04N9/79 , H04N9/831
摘要： A digital color signal processing circuit comprises an automatic phase control loop circuit (13-17, 19) including a first frequency converter (13, 14) which frequency-converts a carrier frequency of an input digital color signal into a first predetermined frequency, a second frequency converter (20) for frequency-converting a carrier frequency of an output signal of the automatic phase control loop circuit into a second predetermined frequency different from the first predetermined frequency, and a control circuit (36, 37, 21) for controlling the second frequency converter based on a control signal obtained from the automatic phase control loop circuit. An output signal of the second frequency converter is outputted as an output signal of the digital color signal processing circuit.
摘要翻译：一种数字彩色信号处理电路包括一个自动相位控制环路电路（13-17），该电路包括将输入数字彩色信号的载波频率频率转换为第一预定频率的第一频率转换器（13,14），第二变频器（20），用于将自动相位控制环电路的输出信号的载波频率变频成与第一预定频率不同的第二预定频率;以及控制电路（36,37,21），用于控制第二变频器基于从自动相位控制环路电路获得的控制信号。输出第二变频器的输出信号作为数字彩色信号处理电路的输出信号。

3. 发明公开

EP0117499A3 Circuit arrangement for measuring and detecting a maximum voltage output 有权
标题翻译：用于测量和检测最大电压输出的电路布置
公开(公告)号：EP0117499A3
公开(公告)日：1986-01-02
申请号：EP84101708
申请日：1984-02-18
申请人： Deutsche Thomson-Brandt GmbH
发明人： Maier, Gerhard , Lange, Joachim
IPC分类号： H03J07/02
CPC分类号： H03J7/02

4. 发明公开

EP0178146A3 Improvements relating to radio receivers 失效
标题翻译：关于无线电接收器的改进
公开(公告)号：EP0178146A3
公开(公告)日：1988-01-13
申请号：EP85307172
申请日：1985-10-07
申请人： PLESSEY OVERSEAS LIMITED
发明人： Lawton, Rodney James
IPC分类号： H03J07/02 , H03D05/00
CPC分类号： H03D5/00 , H03J7/02
摘要： A radio receiver adapted to provide AM or FM demodulation functions comprising a discriminator and a log detector fed in parallel at intermediate frequency from a mixer, an output power amplifier stage fed selectively via a switch from the discriminator or alternatively from the log detector thereby to provide the function required, and a feed back control line via which the discriminator is coupled to a local oscillator which feeds the mixer whereby the frequency of the local oscillator is controlled. The radio preferably also includes an exponential amplifier via which the switch is arranged to feed the log detector to afford the AM demodulation function. The radio has the advantage of affording both AM and FM demodulation functions at low cost in a form which is simple and lends itself to integration techniques.
摘要翻译：一种适于提供AM或FM解调功能的无线电接收机，包括鉴别器和对数检波器，其以混频器的中频并行馈送，输出功率放大器级选择性地经由开关从鉴频器馈送或者选择性地从原木检测器提供，从而提供所需的功能和反馈控制线，通过该反馈控制线将鉴频器耦合到馈送混频器的本地振荡器，从而控制本地振荡器的频率。无线电优选地还包括指数放大器，开关被布置成用于馈送对数检测器以提供AM解调功能。无线电具有以简单的形式以低成本提供AM和FM解调功能的优点，并且适用于集成技术。

5. 发明公开

EP0084876A3 Demodulator arrangement for signals which are frequency-modulated on a carrier wave 失效
标题翻译：在载波波形上进行频率调制的信号的调制解调器布置
公开(公告)号：EP0084876A3
公开(公告)日：1985-10-23
申请号：EP83100559
申请日：1983-01-22
申请人： International Standard Electric Corporation
发明人： Reed, Joseph
IPC分类号： H03D03/00 , H03J07/02 , H03G03/20
CPC分类号： H03G3/3052 , H03D3/007 , H03D7/163 , H03D7/165 , H03J7/02
摘要： Eine Demodulatorschaltung zur Demodulation fre quenzmodulierter Trägerwellen zur Anwendung in einer Null-ZF-Anordnung verwendet einen lokalen Oszillator zur Erzeugung in der Phase quadrierter Ausgangssignale mit einer Frequenz, die gleich der Trägerfrequenz der zu demodulierenden Welle ist. Eine erste und eine zweite Mischschaltung zur getrennten Mischung des frequenz modulierten Signales mit den Ausgangssignalen des loka len Oszillators erzeugen ein erstes und ein zweites Ausgangssignal in Phasenquadratur zueinander. Zwei wei tere Mischschaltungen mischen das Ausgangssignal eines spannungsgesteuerten Oszillators ebenfalls mit den Phasenquadratursignalen des lokalen Oszillators. Die Ausgänge der beiden ersten Mischerschaltungspaare sind über Tiefpassfilter mit den Mischeingängen eines dritten Mischschaltungspaares verbunden, dessen Ausgänge an die Eingänge eines Differenzverstärkers angeschlossen sind. Das Ausgangssignal des Differenzverstärkers regelt die Frequenz des spannungsgesteuerten Oszillators derart, dass das Ausgangssignal des Differenzverstärkers gleich zeitig die demodulierte Spannung ist.

6. 发明公开

EP0176303A3 Automatic frequency and gain control circuit 失效
标题翻译：自动频率和增益控制电路
公开(公告)号：EP0176303A3
公开(公告)日：1987-11-25
申请号：EP85306583
申请日：1985-09-17
申请人： NEC CORPORATION
发明人： Yoshihara, Masashi , Yano, Kazuo
IPC分类号： H03G03/20 , H03J07/02
CPC分类号： H03G3/3068 , H03J7/02
摘要： An AFC/AGC circuit utilized in a receiving apparatus of a ground station for the satellite communication system comprising a digital AFC/AGC controller functioning such that; when the pilot signal is not received, the gain control voltage and the frequency control voltage are respectively set to appropriate values based on the predetermined data; when the pilot signal starts to be received, the gain and frequency control voltages are switched from the set values to the values obtained from the digital AFC and AGC processings, respectively; so long as the pilot signal is being received, the signal generated in the digital AFC and AGC processings are sampled by respective sampling clock signals and the gain and frequency control voltages are determined in accordance with the sampled data; and when the pilot signal stops to be received, each of the gain and frequency control voltages is held at the value sampled by a last pulse of the sampling clock signal immediately before the stopping, respectively.

7. 发明公开

EP0148389A3 Tuning system for a telecommunication apparatus 有权
标题翻译：电信设备调谐系统
公开(公告)号：EP0148389A3
公开(公告)日：1987-04-01
申请号：EP84114292
申请日：1984-11-27
申请人： Deutsche Thomson-Brandt GmbH
发明人： Maier, Gerhard
IPC分类号： H03J07/02
CPC分类号： H03J7/02

8. 发明公开

EP0079689A3 Global positioning system receiver 有权
标题翻译：全球定位系统接收机
公开(公告)号：EP0079689A3
公开(公告)日：1983-07-27
申请号：EP82305569
申请日：1982-10-20
申请人： SPERRY CORPORATION
发明人： Maine, Reuben Edwin
IPC分类号： G01S05/14 , H03L07/08 , H03J07/02
CPC分类号： G01S19/32 , G01S19/26
摘要： In a Global Positioning System type of navigation system, a biphase modulated radio frequency input signal is applied to the "front end" (11) of a double heterodyne receiver having a second intermediate frequency stage which operates in the audio frequency range. The audio output signal is phase locked to a 1 KHz reference signal and is applied to a microprocessor (24) for processing via an interface circuit which includes a relatively simple amplitude detector (51) and a biphase detector (54). The microprocessor (24) also controls the phase shifting of a pseudorandom noise code generator (70) whose output is modulated with the output of the first intermediate frequency stage of the receiver.

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