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1. 发明专利

JP2008271403A Pll frequency synthesizer, receiver, and transmitter 审中-公开
标题翻译： PLL频率合成器，接收器和发送器
公开(公告)号：JP2008271403A
公开(公告)日：2008-11-06
申请号：JP2007114433
申请日：2007-04-24
申请人： Maspro Denkoh Corp , Nippon Hoso Kyokai , マスプロ電工株式会社 , 日本放送協会
发明人： YOSHIMI TOMOFUMI , ISHII MAKOTO , KUSHIRO YUICHIRO , KANAMORI TAKAKO , YOSHIDA KEISUKE , MIZUTANI HIROKAZU
IPC分类号： H03L7/093 , H04B1/04 , H04B1/26
摘要： PROBLEM TO BE SOLVED: To achieve a PLL frequency synthesizer capable of changing an oscillation frequency in a wide range without worsening phase noise with a simple circuit configuration without increasing a device size. SOLUTION: An oscillator 10 is composed of a PLL frequency synthesizer capable of switching an oscillation frequency by changing the frequency-division number of a frequency divider 18 that frequency-divides output from a VCO 12. When an oscillation frequency is changed, filter characteristics of a loop filter 30 forming a PLL loop deviate from proper values. Accordingly, it is devised to provide a feedback resister R2, consisting of a variable resistance element composed of a PIN diode, in an active filter 32 constituting the loop filter 30. A resistance value of the feedback resister R2 is controlled corresponding to the frequency-division number N (that is, an oscillation frequency) of the frequency divider 18. As a result, the filter characteristics of the loop filter 30 always have optimum values so as to prevent phase noise from deteriorating caused by a change in oscillation frequency. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：为了实现能够在不增加设备尺寸的情况下以简单的电路配置在不恶化相位噪声的情况下在宽范围内改变振荡频率的PLL频率合成器。解决方案：振荡器10由PLL频率合成器构成，该PLL频率合成器能够通过改变对VCO12输出进行分频的分频器18的分频数来切换振荡频率。当振荡频率改变时，形成PLL环路的环路滤波器30的滤波器特性偏离适当的值。因此，设计为在构成环路滤波器30的有源滤波器32中提供由由PIN二极管组成的可变电阻元件构成的反馈电阻R2。反馈电阻R2的电阻值对应于频率 - 除法器18的分频数N（即振荡频率）。结果，环路滤波器30的滤波特性总是具有最佳值，以防止由振荡频率的变化引起的相位噪声恶化。版权所有（C）2009，JPO＆INPIT

2. 发明专利

JP2007208350A Bandstop filter 有权
标题翻译： BANDSTOP过滤器
公开(公告)号：JP2007208350A
公开(公告)日：2007-08-16
申请号：JP2006021640
申请日：2006-01-31
申请人： Nippon Dengyo Kosaku Co Ltd , Nippon Hoso Kyokai , 日本放送協会 , 日本電業工作株式会社
发明人： HATANAKA HIROSHI , NOMOTO TOSHIHIRO , KUSHIRO YUICHIRO
IPC分类号： H01P1/20 , H03H7/01
摘要： PROBLEM TO BE SOLVED: To provide a bandstop filter capable of stopping a wide frequency band, without requiring a branching couplers.
SOLUTION: The bandstop filter comprises a hybrid circuit having a first or fourth terminal, and a bandpass filter connected between the second and third terminals of the hybrid circuit. In the bandstop filter, the first terminal of the hybrid circuit is set to be the input terminal of the bandstop filter, and the fourth terminal of the hybrid circuit is set to be the output terminal of the bandstop filter. N pieces of bandpass filters (n is an integer, where n≥2) are connected between the second and third terminals of the hybrid circuit.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供能够停止宽频带的带阻滤波器，而不需要分支耦合器。解决方案：带阻滤波器包括具有第一或第四端子的混合电路和连接在混合电路的第二和第三端子之间的带通滤波器。在带阻滤波器中，混合电路的第一端被设置为带阻滤波器的输入端，并且混合电路的第四端被设置为带阻滤波器的输出端。 N个带通滤波器（n是整数，其中n≥2）连接在混合电路的第二和第三端子之间。版权所有（C）2007，JPO＆INPIT

3. 发明专利

JP2008060642A Band-pass filter and method for designing the same 有权
标题翻译：带通过滤器及其设计方法
公开(公告)号：JP2008060642A
公开(公告)日：2008-03-13
申请号：JP2006231725
申请日：2006-08-29
申请人： Nippon Dengyo Kosaku Co Ltd , Nippon Hoso Kyokai , 日本放送協会 , 日本電業工作株式会社
发明人： NOMOTO TOSHIHIRO , KUSHIRO YUICHIRO , HATANAKA HIROSHI
IPC分类号： H01P1/207 , H01P1/201 , H01P1/205 , H03H7/075 , H03H7/09
摘要： PROBLEM TO BE SOLVED: To provide a method for designing a band-pass filter in which transmission characteristics can be improved in a required signal band at a low cost while sustaining required out-band attenuation characteristics without increasing the overall dimensions, and to provide the band-pass filter. SOLUTION: In the band-pass filter 1 comprising a plurality of resonators 3, distribution of the no-load Q value of each resonator 3 is set depending on the relative electric field strength thereof. More specifically, in a six stage elliptic function filter, amplitude deviation in the band is minimized when the no-load Q value of a first resonator 3 1 and a sixth resonator 3 6 is set at 3,000, and the no-load Q value of a third resonator 3 3 and a fourth resonator 3 4 is set at 7,000. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于设计能够在不增加总体尺寸的同时维持所需的带外衰减特性的同时以低成本提高所需信号频带的传输特性的带通滤波器的方法，以及以提供带通滤波器。解决方案：在包括多个谐振器3的带通滤波器1中，根据其相对电场强度来设定每个谐振器3的空载Q值的分布。更具体地说，在六级椭圆函数滤波器中，当第一谐振器3 <1>和第六谐振器3 6 的空载Q值 >设定为3,000，将第三谐振器3 <3>和第四谐振器3 4 的无负载Q值设定为7,000。版权所有（C）2008，JPO＆INPIT

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