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31. 发明专利

JP2008206010A Frequency converting circuit, reception circuit, and radio clock 审中-公开
标题翻译：频率转换电路，接收电路和无线电时钟
公开(公告)号：JP2008206010A
公开(公告)日：2008-09-04
申请号：JP2007041971
申请日：2007-02-22
申请人： Casio Comput Co Ltd , カシオ計算機株式会社
发明人： SOMEYA KAORU
IPC分类号： H04B1/26 , G04G5/00 , G04R20/10 , G04R40/02 , H03D7/00
摘要： PROBLEM TO BE SOLVED: To stabilize a VCO signal and to obtain an appropriate intermediate frequency signal. SOLUTION: A frequency converting circuit 23 includes an oscillation circuit 30 for outputting, as an oscillation signal, a reference signal or a signal obtained by multiplying the reference signal, a frequency divider 34 for dividing the oscillation signal to generate a local oscillation signal and dividing the oscillation signal to generate a clock signal for controlling a variable filter 38, a mixer 36 for receiving the local oscillation signal and a received signal and mixing them to output a signal having an intermediate frequency, and the variable filter 38 that can change a center frequency depending on the clock signal. A frequency division ratio in the frequency divider is controlled so that the center frequency in the variable filter 38 is substantially equal to the intermediate frequency. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了稳定VCO信号并获得适当的中频信号。解决方案：频率转换电路23包括：振荡电路30，用于输出作为振荡信号的参考信号或通过乘以参考信号获得的信号;分频器34，用于分频振荡信号以产生本地振荡信号并分频振荡信号以产生用于控制可变滤波器38的时钟信号，用于接收本地振荡信号的混频器36和接收信号并将它们混合以输出具有中频的信号，以及可变滤波器38，其可以根据时钟信号改变中心频率。控制分频器中的分频比使得可变滤波器38中的中心频率基本上等于中频。版权所有（C）2008，JPO＆INPIT

32. 实用新型

CN212322075U 一种时间频率校准装置失效
公开(公告)号：CN212322075U
公开(公告)日：2021-01-08
申请号：CN202021180856.9
申请日：2020-06-23
申请人：广东精衡检测科技有限公司
发明人：梁恒军
IPC分类号： G04R40/02
摘要：本实用新型公开了一种时间频率校准装置，包括壳体，所述壳体的两侧均设置有支撑杆，所述壳体一端的外表面均匀排列有插槽A，所述插槽A的内壁的两侧均设置有两个限位槽，所述插槽A的一端设置有导电槽，所述导电槽的内壁设置有插片，所述插片的一侧焊接有数据排线，所述插槽A的内部插接固定有模块，所述模块的两侧均设置有两个限位条，所述模块的一端固定安装有面板，所述面板的外表面均匀排列有操作按钮，所述模块的内部固定安装有电路板，所述模块的另一端设置有插销，所述插销的一端设置有插槽B，所述电路板与操作按钮通过导线连接。本实用新型使装置能够实现快速安装的功能，并且每个结构之间均可单独使用。

33. 发明专利

GB0428228D0 Clock calibration in a mobile radio communications device 未知
公开(公告)号：GB0428228D0
公开(公告)日：2005-01-26
申请号：GB0428228
申请日：2004-12-23
申请人： NEC TECHNOLOGIES UK LTD
IPC分类号： G04R20/14 , G04R40/02 , H04B1/16 , H04W52/02

34. 发明专利

FR2213530B1 未知
公开(公告)号：FR2213530B1
公开(公告)日：1976-05-14
申请号：FR7300637
申请日：1973-01-09
申请人： CHABRAN ANDRE
IPC分类号： G04R20/00 , G04R40/02 , G04C9/02 , G04C11/02

35. 发明专利

FR2213530A1 未知
公开(公告)号：FR2213530A1
公开(公告)日：1974-08-02
申请号：FR7300637
申请日：1973-01-09
申请人： CHABRAN ANDRE
IPC分类号： G04R20/00 , G04R40/02 , G04C9/02 , G04C11/02

36. 发明专利

FR94268E 未知
公开(公告)号：FR94268E
公开(公告)日：1969-07-25
申请号：FR148227
申请日：1968-04-16
申请人： HATOT LEON ETS
IPC分类号： G04C11/08 , G04R40/02 , G04C13/00

37. 发明专利

CH665863A4 未知
公开(公告)号：CH665863A4
公开(公告)日：1967-01-31
申请号：CH665863
申请日：1963-05-28
IPC分类号： G04C13/02 , G04G9/00 , G04R20/22 , G04R20/24 , G04R40/02

38. 发明专利

GB936835A Method for adjusting the motion of quartz-controlled clocks 未知
公开(公告)号：GB936835A
公开(公告)日：1963-09-11
申请号：GB2003760
申请日：1960-06-08
申请人： ELEKTROCAS
发明人： JINDRAK VIKTOR , SIXTA JJAROSLAV
IPC分类号： G04F5/06 , G04R40/02
摘要： 936,835. Automatic frequency control systems. ELEKTROCAS NARODNI PODNIK. June 8, 1960, No. 20037/60. Class 40 (5). A quartz clock is adjusted by varying a D.C. regulator voltage applied to the oscillator crystal (GT cut). The oscillator frequency # is first converted to pulses of recurrence frequency f rich in harmonics and compared with a transmitted standard frequency F=nf in a radio receiver tuned to F, until any beats on its tuning indicator are eliminated by adjusting a voltage regulator controlling the D.C. voltage on the oscillator crystal and hence its frequency. Alternatively a phase discriminator may automatically control the crystal voltage. The clock synchronous motor 9 is driven through a frequency divider 7 from the oscillator. The oscillator may be thermostatically controlled. The clock may be portable and use transistors.

39. 发明专利

FR72833E 未知
公开(公告)号：FR72833E
公开(公告)日：1960-07-22
申请号：FR756438
申请日：1958-01-22
申请人： THOMSON HOUSTON COMP FRANCAISE
IPC分类号： G04R40/02

40. 发明专利

GB820449A Improvements relating to synchronous electric clocks 未知
公开(公告)号：GB820449A
公开(公告)日：1959-09-23
申请号：GB1525556
申请日：1956-05-16
申请人： GEN ELECTRIC
IPC分类号： G04R40/02 , G04R60/02
摘要： 820,449. Electric clocks. GENERAL ELECTRIC CO. May 16, 1956 [May 25, 1955], No. 15255/56. Class 139 In an electric clock of the type disclosed in Specification 819,992 the transducer includes a backing 20, Fig. 1, of conductive material provided on at least one wall of the case and co-acting with a ground system 13 to respond to the alternating field. The conductive backing may be formed by a sheet of metal foil fixed to a wall of the case or by a metallic coating applied to the wall. Where a conductive backing is applied to two or more walls a selector switch is provided so that the most suitable wall may be selected at any instant. In a modification, Fig. 3, there are three conductive backings 10, 20, 30 connected to a selector switch 27 and a phase shifting network 21, 22, 23, 24.

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