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1. 发明专利

JPH02150104A SIGNAL MIXING CIRCUIT 失效
公开(公告)号：JPH02150104A
公开(公告)日：1990-06-08
申请号：JP30490888
申请日：1988-12-01
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HAYASHI TAKAHARU , MIZUTANI KIYOSHI , TSUBOUCHI HIDEO
IPC分类号： H03F3/181
摘要： PURPOSE:To freely set a mixing ratio by flowing one signal current on a base grounded circuit, and constituting a current converter for another signal of a base grounded transistor. CONSTITUTION:A first signal input terminal 21 and a DC bias terminal 22 are connected to the bases of PNP transistors 23 and 24, and DC current sources 25 and 26 and a resistor 27 comprise a signal current source. Here, by switching the DC bias of input terminals 33 and 36 and switch-operating PNP transistors 34 and 35, a second or third input signal selected by the above operation is current-converted by a resistor 32, and flows on an output load resistor 31, and is mixed with a first input signal. In such a case, the mixing ratio of the input signal at an output signal can be varied by selecting the values of the resistors 27 and 32. In such a way, it is possible to freely set the mixing ratio and phase relation at the time of mixing only by adding two transistors, one DC current source, and one resistor on a signal mixing circuit.

2. 发明专利

JPH01137719A FILTER CIRCUIT 失效
公开(公告)号：JPH01137719A
公开(公告)日：1989-05-30
申请号：JP29692487
申请日：1987-11-24
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAMAGAWA NOBUYUKI , AKIYAMA KAZUO , HAYASHI TAKAHARU
IPC分类号： H03H11/04
摘要： PURPOSE:To obtain a plane delay characteristics by adding a phase shifting circuit having fixed amplitude characteristics in all frequency ranges and phase characteristics relating to frequency to an active filter. CONSTITUTION:The phase shifting circuit consisting of resistors R3-R5, a capacitor C3 and an operational amplifier 2 is added to a secondary low pass filter(LPF) consisting of resistors R1, R2, capacitors C1, C2 and an operational amplifier 1 whose gain is K. Since the delay characteristics are not plane when the interrupting characteristics of the LPF go sharp, the delay characteristics are corrected by connecting the phase shifting circuit having the fixed amplitude characteristics in the whole frequence range and the phase characteristics relating to frequency in series to make the delay characteristics of a passing band plane.

3. 发明专利

JPS647548B2 失效
公开(公告)号：JPS647548B2
公开(公告)日：1989-02-09
申请号：JP13458781
申请日：1981-08-27
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HASHIMOTO SEIICHI , HAYASHI TAKAHARU
IPC分类号： G11B20/06 , G11B20/18 , H04N5/94 , H04N5/95

4. 发明专利

JPS59147517A Amplitude limit circuit 失效
标题翻译：放大限制电路
公开(公告)号：JPS59147517A
公开(公告)日：1984-08-23
申请号：JP2066983
申请日：1983-02-10
申请人： Matsushita Electric Ind Co Ltd
发明人： HAYASHI TAKAHARU
IPC分类号： H03G11/02 , H03G11/00
CPC分类号： H03G11/00
摘要： PURPOSE:To reduce an offset potential of the titled circuit by applying a bias potential from a common DC source to each base of transistors (TRs) for input converting circuit and providing a negative feedback loop to one base of a differential pair so as to make the current value of the differential pair equal at all times. CONSTITUTION:A current mirror circuit is constituted of the 1st and 2nd TRs 8, 13 and this circuit is taken as a load circuit for an emitter matching differential amplifier circuit comprising the pair of TRs 6, 12. The potential of the collector is fed back to the base of the TR12 via a resistor 14, a TR17 and a resistor 15. Further, the emitter of TRs 3, 20 for converting input is connected to the base of the TRs 6, 12 via resistors, 5, 18 and a voltage of a common bias power supply 22 is applied to the base of the TRs 3, 20. Further, diodes 10, 11 are connected in the same polarity in parallel between collectors of the TRs 6, 12. Then, the current value of the differential pair is made always equal and the DC offset potential of an amplitude limit circuit is decreased.
摘要翻译：目的：通过将公共直流电源的偏置电位施加到用于输入转换电路的每个晶体管基极（TR），并向差分对的一个基极提供负反馈回路来减小标称电路的偏移电位，从而使差分对的当前值始终相等。构成：电流镜电路由第一和第二TRs8,13构成，该电路被作为包括一对TR6,12的发射体匹配差分放大器电路的负载电路。集电极的电位被反馈通过电阻器14，TR17和电阻器15到TR12的基极。此外，用于转换输入的TR 3，20的发射极经由电阻器5,18连接到TR 6,12的基极，并且电压公共偏置电源22被施加到TR 3，20的基极。此外，二极管10,11在TR 6,12的集电极之间以相同的极性并联连接。然后，差分电流的电流值使得对使得总是相等，并且限幅电路的DC偏置电位减小。

5. 发明专利

JPS58115996A SECAM SIGNAL RECORDER AND REPRODUCER 失效
公开(公告)号：JPS58115996A
公开(公告)日：1983-07-09
申请号：JP21282381
申请日：1981-12-29
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HAYASHI TAKAHARU , ARAKI FUMIAKI , OOURA KENKICHI , KAKIMOTO TAKASHI
IPC分类号： H04N9/86 , H03H11/04 , H04N5/922 , H04N9/79
摘要： PURPOSE:To obtain a magnetic recorder and reproducer for SECAM system television color signals, which realizes accurate inverting characteristics for recording and reproduction in using a bell filter and an equivalent filter in common at recording and reproduction, and reduces cost with the reduction in the number of elements forming the circuit. CONSTITUTION:At recording, switches 45, 46 are short-circuited and a switch 42 is opened, a transistor (TR) 48 is interrupted, and an emitter impedance R6E of a TR49 consists of a series resonance impedace Z comprising a resistor 50, a capacitor 51, and an inductance 52, and of a parallel impedance comprising the series resonance impedance Z and a resistor 53 (Rs), and the frequency characteristics of 1/A are obtained. At reproduction, the switch 42 is short-circuited, the switches 45, 46 are opened, the TR49 is interrupted, an SECAM color signal at reproduction inputted from an input terminal 44 is divided with the impedances Rs and Z and outputted at an output terminal 47. Thus, the output frequency characteristics is Z/(Rs+Z), and the frequency characteristic A is realized with the Rs and Z selected at recording.

6. 发明专利

JPS5899010A BALANCED MODULATOR 失效
公开(公告)号：JPS5899010A
公开(公告)日：1983-06-13
申请号：JP19928781
申请日：1981-12-09
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： OOURA KENKICHI , ARAKI FUMIAKI , HAYASHI TAKAHARU , KAKIMOTO TAKASHI
IPC分类号： H03D1/22
摘要： PURPOSE:To operate the modulator sufficiently even at a low operating voltage, by providing a current mirror circuit for an output stage of a differential amplifier circuit for signals to be modulated, converting the signals and inputting them to a double balanced type switch circuit. CONSTITUTION:A signal vm to be modulated is inputted to a differential amplifier circuit 1 for the signal, and the signal is converted into a current and inputted to a current mirror circuit 3 after amplification. The output current of the circuit 1 becomes a voltage variable component vD(m) of diodes Q03, Q04, is inputted to transistors (TR)Q05, Q06 and outuputted in opposite phase with each other at the collectors. The output of the circuit 3 is inputted to TRs Q07-Q10 of a double balance type switch circuit 2. A carrier wave signal vc is amplified at a differential amplifier circuit 4 for carrier waves, the output is inputted to bases of the TRsQ07-Q10, where the signals vm and vc are multiplied and the result is inputted to a load RL. Since the variable component of the signal VD(m) is far smaller than that of the signal vm, the input voltage permissible range of the signal vm is not effected by the amplitude of the vm even if the operating power supply voltage is lowered.

7. 发明专利

JPS5836087A DROPOUT COMPENSATOR 失效
公开(公告)号：JPS5836087A
公开(公告)日：1983-03-02
申请号：JP13458781
申请日：1981-08-27
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HASHIMOTO SEIICHI , HAYASHI TAKAHARU
IPC分类号： G11B20/06 , G11B20/18 , H04N5/94 , H04N5/95
摘要： PURPOSE:To suppress variation in DC potential within a practical use range, to eliminate the need fo adjustment, and to prevent the generation of spotlike disturbance, by switching the difference signals between two modulated signal which contain little DC component, and an amplitude-limited signal. CONSTITUTION:This dropout compensator consists of the 1st demodulator 8 for demodulating the output signal of the 1st electronic switch 2, the 2nd demodulator 10 for demodulating the output signal of a delay device 6, the 1st subtracting circuit 17 for extracting the difference component between the outputs of the 1st and 2nd demodulators, a filter 18 which cuts off DC components and transmits a specific frequency signal, the 2nd electronic switch 19 having two input terminals 20 and 21 and one output terminal 22, the 2nd delay circuit 23 which generates a signal for controlling the switch 19 without delay during the generation of a dropout and with prescribed-time delay after the completion of the dropout, and the 2nd subtracting circuit which subtracts the output signal of the switch 19 from the output signal of an amplifier 24. Thus, the generation of spotlike disturbance is prevented during the generation and completion of dropout disturbance.

8. 发明专利

JPH03117007A AMPLIFIER CIRCUIT FOR SEMICONDUCTOR INTEGRATED CIRCUIT 失效
公开(公告)号：JPH03117007A
公开(公告)日：1991-05-17
申请号：JP25390589
申请日：1989-09-28
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAMAGAWA NOBUYUKI , HAYASHI TAKAHARU , AKIYAMA KAZUO
IPC分类号： H03F3/187
摘要： PURPOSE:To realize an amplifier circuit, for which over shoot or ringing is hardly generated even when the pulse of sharp rising and falling is amplified, by serially connecting a resistor between the emitter of a transistor and a signal source. CONSTITUTION:Between the emitter of the transistor and a signal source 6, a resistor 5 is serially connected in order to change a frequency property, namely, in order to prevent the over shoot or the ringing from being generated when a signal including a high frequency component is amplified. Thus, the amplifier circuit can be realized so that the over shoot or the ringing can not be generated even when the pulse of sharp rising and falling is amplified.

9. 发明专利

JPS58221587A Secam signal recording and reproducing device 失效
标题翻译： SECAM信号记录和再现设备
公开(公告)号：JPS58221587A
公开(公告)日：1983-12-23
申请号：JP10494682
申请日：1982-06-17
申请人： Matsushita Electric Ind Co Ltd
发明人： HAYASHI TAKAHARU , KAKIMOTO TAKASHI , OOURA KENKICHI , ARAKI FUMIAKI
IPC分类号： G11B20/02 , H04N9/86
CPC分类号： H04N9/86
摘要： PURPOSE:To decrease the number of control part of a filter and to facilitate formation of a semiconductor IC, by using a bell filter and an equivalent filter in common with each other in both recording and reproducing modes. CONSTITUTION:An SECAM color signal is supplied to a terminal 1 in a recording mode, and the signal amplified by a differential amplifier 2 is supplied to a filter 7 having frequency characteristics A via a switch 3. The output of the filter 7 is negatively fed back to the amplifier 2. Thus the 1/A frequency characteristics are realized as a whole. As a result, the level of the SECAM color signal is constant regardless of the frequency and then delivered through a filter 27 of frequency characteristics A' via an amplitude limiting circuit 13 and a frequency divider 18. In a reproducing mode a reproduced 1/4 SECAM color signal is supplied to a terminal 21. The reproduced SECAM color signal is obtained at a terminal 20 by operating a switch and changing the route of the signal.
摘要翻译：目的：通过在记录和再现模式下通过使用钟形滤波器和等效滤波器来减少滤波器的控制部分的数量并促进半导体IC的形成。构成：在记录模式中将SECAM彩色信号提供给端子1，并且由差分放大器2放大的信号通过开关3提供给具有频率特性A的滤波器7.滤波器7的输出被负压回到放大器2.因此，1 / A频率特性总体上实现。结果，SECAM颜色信号的电平无论频率如何都是恒定的，然后经由振幅限制电路13和分频器18通过频率特性A'的滤波器27传送。在再现模式中，再现1/4 SECAM彩色信号被提供给终端21.通过操作开关并改变信号的路线，在端子20处获得再现的SECAM彩色信号。

10. 发明专利

JPH0370439B2 失效
公开(公告)号：JPH0370439B2
公开(公告)日：1991-11-07
申请号：JP21282381
申请日：1981-12-29
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HAYASHI TAKAHARU , ARAKI FUMIAKI , OORA KENKICHI , KAKIMOTO TAKASHI
IPC分类号： H04N9/86 , H03H11/04 , H04N5/922 , H04N9/79

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