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公开(公告)号：EP1469608A1
公开(公告)日：2004-10-20
申请号：EP03701820.7
申请日：2003-01-21
CPC分类号： H04B1/28
摘要： A high-frequency signal receiver includes a mixer having one port for receiving an input signal and another port for receiving an output from a local oscillator, a filter for receiving an output from the mixer, and an output terminal to which an output from the filter is supplied. At least the mixer and the filter are formed of balanced circuits, so that they have high capability of eliminating interference. Distances between the circuits thus can be short. Further, partition plates for shielding the interference are not needed, thus allowing the receiver to be small.
摘要翻译： 高频信号接收机包括具有用于接收输入信号的一个端口和用于接收来自本地振荡器的输出的另一端口的混频器，用于接收来自混频器的输出的滤波器以及来自滤波器的输出端的输出端子 被提供。 至少混频器和滤波器由平衡电路形成，使得它们具有高的消除干扰的能力。 因此，电路之间的距离可以很短。 此外，不需要用于屏蔽干扰的隔板，因此允许接收器较小。
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公开(公告)号：EP0767533B1
公开(公告)日：2000-07-12
申请号：EP96910212.8
申请日：1996-04-19
发明人： YASUDA, Masashi , FUJISHIMA, Akira
摘要： An RF apparatus with a built-in FM demodulator, which improves threshold effectively. This apparatus comprises an FM demodulator, a circuit (114) for detecting the FM modulation factor from a demodulated output, an input signal intensity detector (103), a circuit (110) for combining the output supplied from the FM modulation factor detector (114) through a switch (109) and the output from the input signal intensity detector (103) to generate a control signal, wherein the gain is varied by the output of the circuit (110). An optimum demodulation band width is obtained according to the modulation factor of the input signal, and the threshold can be improved effectively without generating a large noise due to a synchronization error.
摘要翻译： 内置FM解调器的RF设备，可有效提高阈值。 该设备包括FM解调器，用于从解调输出中检测FM调制因子的电路（114），输入信号强度检测器（103），用于组合从FM调制因子检测器（114）提供的输出的电路 ）通过开关（109）和来自输入信号强度检测器（103）的输出来产生控制信号，其中增益通过电路（110）的输出而改变。 根据输入信号的调制系数获得最佳解调带宽，并且可以有效地提高阈值，而不会由于同步误差而产生大的噪声。
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公开(公告)号：EP1282239A1
公开(公告)日：2003-02-05
申请号：EP02714514.3
申请日：2002-04-05
发明人： YASUDA, Masashi , FUJISHIMA, Akira
IPC分类号： H04B1/16
CPC分类号： H04B1/005 , H04B1/0096 , H04B1/18 , H04B1/28
摘要： When changeover switch (26) selects the output of L band filter (23), changeover switch (28) is turned off and mixer (29) is operated as an amplifier such that the oscillation frequency of local oscillator (31) is controlled based on data fed to data terminal (37) and a channel selection can be performed in mixer (32). When changeover switch (26) selects the output of V band filter (25), changeover switch (28) is turned on and a channel selection is performed based on data fed to data terminal (37) in mixer (29). With this arrangement, the need for a tuning filter is eliminated and a broadband tuner not requiring manpower for adjustments can be provided.
摘要翻译： 当切换开关（26）选择L波段滤波器（23）的输出时，转换开关（28）关闭，混频器（29）作为放大器工作，使得本地振荡器（31）的振荡频率基于 馈送到数据终端（37）的数据和信道选择可以在混频器（32）中执行。 当切换开关（26）选择V波段滤波器（25）的输出时，转换开关（28）导通，并且基于在混频器（29）中馈送到数据端子（37）的数据执行频道选择。 利用这种布置，消除了对调谐滤波器的需要，并且可以提供不需要用于调整的人力的宽带调谐器。
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公开(公告)号：EP0767533A1
公开(公告)日：1997-04-09
申请号：EP96910212.8
申请日：1996-04-19
发明人： YASUDA, Masashi , FUJISHIMA, Akira
IPC分类号： H03D3/00
摘要： The present invention relates to a high-frequency apparatus incorporating a FM demodulator, and is objected to improve its threshold effectively always.
For achieving this object, the apparatus of this invention is comprised of a FM demodulator means (113), a detector (114) detecting the degree of FM demodulation of the output from the FM demodulator (113), an input signal intensity detector (103) and a composite circuit (110) which combines an output supplied from the detector (114) through a switch (109) with the output of the input signal intensity detector (103) and produces a control signal of a gain control circuit (102).
The apparatus of this invention provides optimum FM demodulation bandwidth according to FM modulation degree of input signal and can realize constantly improvement of threshold without producing unusual noise due to out of synchronization.摘要翻译： 本发明涉及包含FM解调器的高频设备，并且反对总是有效地改进其阈值。 为了实现这个目的，本发明的设备包括一个FM解调器装置（113），一个检测来自FM解调器（113）的输出的FM解调程度的检测器（114），一个输入信号强度检测器（103 ）和组合检测器（114）通过开关（109）提供的输出与输入信号强度检测器（103）的输出并产生增益控制电路（102）的控制信号的复合电路（110） 。 本发明的装置根据输入信号的FM调制度提供最佳的FM解调带宽，并且可实现阈值的不断提高，而不会由于不同步而产生异常噪声。
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