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11. 发明专利

JPS6255742B2 失效
公开(公告)号：JPS6255742B2
公开(公告)日：1987-11-20
申请号：JP11350780
申请日：1980-08-20
申请人： HITACHI LTD
发明人： IENAKA MASANORI
IPC分类号： H04B1/10 , H04B1/16 , H04H1/00 , H04H40/63 , H04H40/72

12. 发明专利

JPS6223501B2 失效
公开(公告)号：JPS6223501B2
公开(公告)日：1987-05-23
申请号：JP14889979
申请日：1979-11-19
申请人： HITACHI LTD
发明人： IENAKA MASANORI
IPC分类号： H04B1/10 , H04H1/00 , H04H40/45 , H04H40/72 , H04H40/81

13. 发明专利

JPS6214142B2 失效
公开(公告)号：JPS6214142B2
公开(公告)日：1987-03-31
申请号：JP9729879
申请日：1979-08-01
申请人： HITACHI LTD
发明人： IENAKA MASANORI
IPC分类号： H04B1/10 , H03G3/34

14. 发明专利

JPS6153838A Fm and am receiver 失效
标题翻译： FM和AM接收器
公开(公告)号：JPS6153838A
公开(公告)日：1986-03-17
申请号：JP17496084
申请日：1984-08-24
申请人： Hitachi Ltd
发明人： IENAKA MASANORI
IPC分类号： H04B1/26
摘要： PURPOSE: To simplify the circuit constitution and to obtain the FM and AM receiver having excellent temperature characteristics by sharing a detecting circuit, etc., provided behind an intermediate frequency amplifying circuit between FM reception and AM reception.
CONSTITUTION: An FM receive signal is converted by a mixing circuit 3 to an intermediate frequency of 10.8MHz and inputted to an intermediate frequency amplifier IC from a terminal 1. An AM receive signal is converted by a mixing circuit 43 to an intermediate frequency of 0.45MHz and inputted to a terminal 2 of an IC. In the IC, the FM intermediate frequency signal is amplified 5∼8 and frequency-divided by a frequency divider 9 to 0.45MHz. Therefore, the FM intermediate frequency is equal to the AM intermediate frequency in the IC and a quadrature detector 11 connected subsequently is used in common, thereby simplifying the circuit constitution. The audio output of the detector 11 is inputted to a stereophonic demodulating circuit 13 and a stop signal generating circuit 14 through LPF12 and a right and a left stereophonic signal are outputted from the circuit 13. The circuit 14 outputs a stop signal to a controller 31 at a digital tuning point.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：为了简化电路结构，通过共享检测电路等获得具有优良温度特性的FM和AM接收器，在FM接收和AM接收之间设置中频放大电路。构成：FM接收信号由混合电路3转换为10.8MHz的中频，并从终端1输入到中频放大器IC。AM接收信号由混频电路43转换成中频为0.45 MHz，并输入到IC的终端2。在IC中，FM中频信号被放大5-8并被分频器9分频为0.45MHz。因此，FM中频等于IC中的AM中频，并且共同使用随后连接的正交检波器11，从而简化了电路结构。检测器11的音频输出被输入到立体声解调电路13，通过LPF12输入停止信号产生电路14，并从电路13输出右和左立体声信号。电路14向控制器31输出停止信号在数字调音点。

15. 发明专利

JPS5947487B2 JPS5947487B2 - 失效
公开(公告)号：JPS5947487B2
公开(公告)日：1984-11-19
申请号：JP14335276
申请日：1976-12-01
申请人： Hitachi Ltd
发明人： IENAKA MASANORI
IPC分类号： H03G3/10 , H03G3/34 , H04B1/10 , H04H1/00 , H04H40/45

16. 发明专利

JPS5930351B2 JPS5930351B2 - 失效
标题翻译：空值
公开(公告)号：JPS5930351B2
公开(公告)日：1984-07-26
申请号：JP5770777
申请日：1977-05-20
申请人： Hitachi Ltd
发明人： IENAKA MASANORI
IPC分类号： H03D1/22 , H04B1/10 , H04B1/16 , H04H1/00 , H04H40/72
CPC分类号： H04H40/72 , H03D1/2236 , H04B1/1646 , Y02D70/00 , Y02D70/40
摘要： In an FM stereo demodulator, a detector circuit for detecting a low supply voltage is used. The detection level of this detector circuit is made substantially equal to a supply voltage value at the time when the oscillation frequency of an oscillator circuit for reproducing a subcarrier signal begins to change. The stereo reproduction of the demodulator is compulsorily switched to monaural reproduction by an output from the detector circuit. As a result, the generation of an abnormal sound which is attributed to the beat between the reproduced subcarrier signal having fluctuated and a subcarrier signal component of a received broadcast signal is prevented.
摘要翻译：在FM立体声解调器中，使用用于检测低电源电压的检测器电路。该检测器电路的检测电平基本上等于用于再现副载波信号的振荡电路的振荡频率开始变化时的电源电压值。解调器的立体声再现通过检测器电路的输出强制切换到单声道再现。结果，防止了由于具有波动的再现的副载波信号和接收到的广播信号的副载波信号分量之间的拍子而产生的异常声音的产生。

17. 发明专利

JPS5826222B2 失效
公开(公告)号：JPS5826222B2
公开(公告)日：1983-06-01
申请号：JP3955182
申请日：1982-03-15
申请人： HITACHI LTD
发明人： IENAKA MASANORI , SUZUKI YUKIRO
IPC分类号： H03D1/22 , H04H1/00 , H04H40/45 , H04H40/72

18. 发明专利

JPS5836026A RADIO RECEIVER 失效
公开(公告)号：JPS5836026A
公开(公告)日：1983-03-02
申请号：JP13407781
申请日：1981-08-28
申请人： HITACHI LTD
发明人： IENAKA MASANORI
IPC分类号： H04B1/18 , H03G3/30
摘要： PURPOSE:To reduce the current supply ability of an AGC voltage generating circuit while setting an AGC operation start level precisely, by controlling the extent of attenuation of the output signal of an amplifying transistor (TR) through a transistor (TR) and an impedance means. CONSTITUTION:According to a rise in AGC voltage, the collector-emitter saturation resistance rCS of a TRQ1 is reduced to attenuate a received signal to an RF amplification stage, thus performing AGC operation. A voltage drop across a resistance R1 by the base current of the TRQ1 is utilized starting approximately at the point the collector-emitter saturation resistance rCS reaches a minimum value according to a rise in the AGC voltage, thereby turning on a TRQ2. The collector of the TRQ2 is connected to the drain of an amplifying TRF1 through a capacitor C8 in terms of alternating current, so it operates in a saturation region. Therefore, the gain of the RF amplifier decreases as the collector-emitter saturation resistance rCS of the TRQ2 decreases, performing the AGC operation.

19. 发明专利

JPS57143951A STEREOPHONIC DEMODULATOR 失效
公开(公告)号：JPS57143951A
公开(公告)日：1982-09-06
申请号：JP2845781
申请日：1981-03-02
申请人： HITACHI LTD
发明人： ISO YOSHIMI , IENAKA MASANORI , INOUE SHIGEKI
IPC分类号： H03D1/22 , H04H1/00 , H04H40/45 , H04H40/72
摘要： PURPOSE:To stabilize the operation of a demodulator by improving its SCA signal elimination ratio, by canceling each other an SCA signal and an unnecessary signal included in a composite signal, and a beat signal brought out by higher harmonics of a subcarrier frequency. CONSTITUTION:The oscillation frequency of the VCO7 of a PLL type stereophonic demodulator is set N times as high as a subcarrier frequency, and then divided by frequency dividers 101 and 102 to the subcarrier frequency, and the result is further divided by a frequency divider 9 and inputted to a phase comparator 4. The output of the frequency divider 102 is supplied to a waveform shaping circuit 104 to generate a sampling signal with short pulse width, which is switched as prescribed by switching circuits 106 and 108 and held by holding amplifier 110 and 112, whose outputs are inputted to mixers 113 and 114. The output of the frequency divider 101 is multiplied by a composite signal through analog multiplying circuits 105 and 107, and the resulting signals are inputted through LPFs 109 and 111 to the mixers 113 and 114; and the outputs of the LPFs and those of the amplifiers 110 and 112 are operated by gain adjustment, thus canceling beats.

20. 发明专利

JPS5758418A Muting circuit 失效
标题翻译：静音电路
公开(公告)号：JPS5758418A
公开(公告)日：1982-04-08
申请号：JP13291180
申请日：1980-09-26
申请人： Hitachi Ltd
发明人： ISO YOSHIMI , IENAKA MASANORI
IPC分类号： H03G3/34 , H04B1/10 , H04H1/00 , H04H40/72
CPC分类号： H04H40/72 , H03G3/348
摘要： PURPOSE:To reduce the pop tone appeared at an output terminal, by locating a muting element producing pop tone before a leakage filter, in a muting circuit of an FM stereophonic radio receiver. CONSTITUTION:A composite signal being an output of a detector inputted to a stereophonic demodulator 7 of an FM stereophonic radio receiver is demodulated into left and right signals and inputted to an amplifier 8, and the output is applied to a filter 9 via resistors R18, R19 constituting the input impedance of a leakage filter. Taking the values of the resistor R18, R19, equal as a half of a resistor R15, pop tone produced at a muting transistor 17 controlled with a muting control circuit 102 is 2/3 at an output terminal 20 to be almost halved. The attenuation of a signal is -49.5dB and the attenuation when muting is operated is at -47dB, which gives deterioration of only 2.5dB, indicating almost no effect.
摘要翻译：目的：通过在FM立体声无线电接收机的静音电路中，通过在泄漏滤波器之前定位产生流行音调的静音元件来减少输出端子出现的音色。构成：作为输入到FM立体声无线电接收机的立体声解调器7的检测器的输出的复合信号被解调为左和右信号并输入到放大器8，并且经由电阻器R18， R19构成漏电滤波器的输入阻抗。将电阻器R18，R19的值等于电阻器R15的一半，在用静音控制电路102控制的静音晶体管17产生的弹奏音调在输出端子20处为2/3，几乎减半。信号的衰减为-49.5dB，静音时的衰减为-47dB，恶化仅为2.5dB，几乎没有影响。

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