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1. 发明专利

JPS58191538A Diversity receiver for car mounting 失效
标题翻译：用于汽车安装的多样化接收器
公开(公告)号：JPS58191538A
公开(公告)日：1983-11-08
申请号：JP7383982
申请日：1982-04-30
申请人： Clarion Co Ltd
发明人： HAMADA MASANORI , ONO SADAO
IPC分类号： H04B7/08
CPC分类号： H04B7/0814 , H04B7/0831
摘要： PURPOSE: To improve the S/N with only one receiver, by branching a voltage detected at the receiver into two paths, comparing the result and switching plural antennas in response to the result of comparison.
CONSTITUTION: An output from an IF amplifier stage 4 is branched into two paths and given to a detection section 8, which is a signal detecting means to discriminate the propriety of a signal voltage received from an antenna 1a or 1b and detects a DC voltage proportional to the electric field intensity received at the antenna or comparing the electric field intensity and a multi-path level and operating them. Further, a control section 9 executes or holds the switching operation of an antenna changeover switch 2 in response to the signal voltage from the section 8. Thus, the receiver is connected to the antenna of the best reception at all times.
COPYRIGHT: (C)1983,JPO&Japio
摘要翻译：目的：仅通过一个接收机来提高信噪比，通过将接收机检测到的电压分为两路，比较结果并根据比较结果切换多个天线。构成：来自IF放大器级4的输出被分支成两个路径，并且被提供给检测部分8，该检测部分8是用于区分从天线1a或1b接收的信号电压的适当性的信号检测装置，并且检测直流电压成比例对于天线处接收到的电场强度，或者比较电场强度和多路径电平并进行操作。此外，控制部9响应于来自部分8的信号电压来执行或保持天线切换开关2的切换操作。因此，接收机始终连接到最佳接收的天线。

2. 发明专利

JPS5352007A DEVICE FOR APPLYING AUTOMATIC SCAN AND STOP SIGNAL TO AUTOMATIC TUNING RADIO 失效
公开(公告)号：JPS5352007A
公开(公告)日：1978-05-12
申请号：JP12617076
申请日：1976-10-22
申请人： CLARION CO LTD
发明人： ONO SADAO
IPC分类号： H03J7/18

3. 发明专利

JPS57150242A DIVERSITY RECEIVING DEVICE 失效
公开(公告)号：JPS57150242A
公开(公告)日：1982-09-17
申请号：JP17811781
申请日：1981-11-06
申请人： NISSAN MOTOR , CLARION CO LTD
发明人： KAWAGISHI MASAO , TOMIYAMA YORITSUGU , FUKUHARA HIROSHIGE , HAMADA MASANORI , ONO SADAO , MATSUMARU SHIYOUJI
IPC分类号： H03J7/18 , H04B7/08
摘要： PURPOSE:To exactly execute automatic channel selection, by providing an automatic channel selection stop signal generator on only a receiving system whose antenna gain is highest, among plural receiving systems, and constituting it so that an automatic channel selection stop signal is applied to a local oscillation signal generator of a tuner of all the receiving systems. CONSTITUTION:An automatic channel selection stop signal generating circuit 10 is provided on an intermediate frequency amplifying stage 5a of a receiving system (a) whose antenna gain is highest, among plural receiving systems. A diversity switching signal outputted from a comparing circuit 9 operates so as to switch only a sound signal switching circuit 7. Also, an automatic channel selection stop signal is fetched from one automatic channel selection stop signal generating circuit 10, and is applied to a common local oscillation stage. In this regard, (b) denotes a receiving circuit system.

4. 发明专利

JPS57150239A DIVERSITY RECEIVING DEVICE 失效
公开(公告)号：JPS57150239A
公开(公告)日：1982-09-17
申请号：JP3574681
申请日：1981-03-12
申请人： NISSAN MOTOR , CLARION CO LTD
发明人： HASHIMOTO ATSUMI , KUBOTA MASAMI , FUKUHARA HIROSHIGE , ONO SADAO , MATSUMARU SHIYOUJI , YUMOTO TERUO
IPC分类号： H04B7/08
摘要： PURPOSE:To prevent a selection error due to a sensor, by switching a receiving system in accordance with an electric field intensity signal fixed to a prescribed value, and a multipath distortion signal, when the electric field intensity of a receiving wave is strong. CONSTITUTION:This device is constituted so that an output point A of an S meter is capable of obtaining the voltage corresponding to receiving electric field intensity. when the sensor voltage of the output point A rises and attains to some level, diodes D1, D2 constituting a limiting circuit 4 are biased in the forward direction, becomes a conducting state, and at this moment, the sensor voltage of the output point A is fixed to forward-bias voltage VF of the diodes D1, D2. That is to say, when the sensor voltage rising in accordance with the receiving electric field attains to VF, the limiter is applied, and its value is fixed to a constant prescribed value. In this regard, 1, 2 and 3 denote an intermediate frequency amplifying circuit, a distortion component detecting circuit and a diversity switching circuit, respectively.

5. 发明专利

JPS5746530A Switching circuit 失效
标题翻译：切换电路
公开(公告)号：JPS5746530A
公开(公告)日：1982-03-17
申请号：JP12173880
申请日：1980-09-04
申请人： Clarion Co Ltd
发明人： IDA YASUHIRO , ONO SADAO
IPC分类号： H03K17/00 , H03K17/62
CPC分类号： H03K17/62
摘要： PURPOSE:To obtain a switching circuit having a function equivalent to a lock switch, by combining a nonlock switch and an FF circuit. CONSTITUTION:A nonlock key switch S is connected to an FF circuit consisting of NAND circuits Q3 and Q4 through buffer amplifiers Q1 and Q2. Switching transistors Q5 and Q6 are connected to the output of the FF circuit. When the switch S is turned on, a negative pulse is flowed to the input of the circuit Q4, and the circuit Q4 becomes H-level, and transistors Q6 and Q5 are inverted to the turning-on state and the turning-off state respectively. When the switch S is turned on again, the output of the circuit Q3 becomes H-level, and the circuit is returned to the original state.
摘要翻译：目的：通过组合非锁定开关和FF电路来获得具有与锁定开关等效的功能的开关电路。构成：非锁键开关S通过缓冲放大器Q1和Q2连接到由NAND电路Q3和Q4组成的FF电路。开关晶体管Q5和Q6连接到FF电路的输出。当开关S导通时，负脉冲流向电路Q4的输入，电路Q4变为H电平，晶体管Q6和Q5分别转换为导通状态和关断状态。当开关S再次接通时，电路Q3的输出变为H电平，电路返回到初始状态。

6. 发明专利

JPS5830244A FM RADIO RECEIVER 失效
公开(公告)号：JPS5830244A
公开(公告)日：1983-02-22
申请号：JP12889781
申请日：1981-08-18
申请人： NISSAN MOTOR , CLARION CO LTD
发明人： HASHIMOTO ATSUMI , KUBOTA MASAMI , FUKUHARA HIROSHIGE , HAMADA MASANORI , ONO SADAO
IPC分类号： H03K17/00 , H04B7/08
摘要： PURPOSE:To prevent noises from occurring at the time of switching in the titled receiver which is provided with two pairs of antennas and reproduces voices by switching the receiving system to the one having larger electric field intensity, by installing comparators which correspond to the electric field intensity of each received wave to each receiving system. CONSTITUTION:A signal received through the 1st antenna is supplied to a multiplex circuit 16 through a wave detecting means 10 and a switching means 13. Another signal received through the 2nd antenna is supplied to the circuit 16 through another wave detecting means 11 and another switching means 14. To comparators 12 and 12', signals V1 and V2 which correspond to the electric field intensity of received waves are supplied from the 1st and 2nd antennas through a high frequency amplifying means. The comparators 12 and 12' turn on one of the switching circuits 13 and 14 in accordance with the size of the signals V1 and V2.

7. 发明专利

JPS57150240A DIVERSITY RECEIVING DEVICE 失效
公开(公告)号：JPS57150240A
公开(公告)日：1982-09-17
申请号：JP3574781
申请日：1981-03-12
申请人： NISSAN MOTOR , CLARION CO LTD
发明人： KAWAGISHI MASAO , TOMIYAMA YORITSUGU , FUKUHARA HIROSHIGE , ONO SADAO , MATSUMARU SHIYOUJI , YUMOTO TERUO
IPC分类号： H04B7/08 , H04B7/02
摘要： PURPOSE:To expand a range of a diversity switching operation to a high electric field, by providing a means for controlling so that an output signal level of a high frequency amplifying circuit of a receiving system becomes constant in accordance with electric field intensity of an intermediate frequency amplifying circuit. CONSTITUTION:A signal from an antenna 1 is amplified by a high frequency amplifying circuit 2 and an intermediate frequency amplifying circuit 3, and is supplied to a distortion component detecting circuit 4. The gain of the high frequency amplifying circuit 2 is controlled automatically by an automatic gain controlling circuit 6 in accordance with an S meter output signal level of the receiving electric field intensity by which an AM component by multipath distortion has been outputted sufficiently. In this way, an output signal level of the high frequency amplifying circuit 2 is controlled so as to be constant, the S meter is not saturated, and magnitude of the AM component by multipath distortion is displayed as output voltage.

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