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1. 发明授权

US4081837A Undesired signal canceller 失效
标题翻译：不需要的信号消除器
公开(公告)号：US4081837A
公开(公告)日：1978-03-28
申请号：US698674
申请日：1976-06-22
申请人： Masahiro Tada , Takao Sumi , Masayuki Hongu , Yoshio Ishigaki
发明人： Masahiro Tada , Takao Sumi , Masayuki Hongu , Yoshio Ishigaki
IPC分类号： H04B1/10 , H04N5/21
CPC分类号： H04N5/211
摘要： An undesired signal canceller for a composite amplitude modulated signal including an undesired signal delayed by a time .tau..sub.o from a desired signal. The composite signal is supplied to a detector circuit. A carrier signal of the same frequency as that of the amplitude modulated carrier and delayed in phase by the time .tau..sub.o is produced. This carrier signal is amplitude modulated with a signal formed by delaying the output signal from the detector circuit by the time .tau..sub.o, and the amplitude modulated carrier signal is combined with the composite amplitude modulated signal to cancel the undesired signal therefrom.
摘要翻译：用于复合幅度调制信号的不需要的信号消除器，包括从期望信号延迟了时间τo的不期望信号。复合信号被提供给检测器电路。产生与幅度调制载波相同频率的载波信号，并且产生延迟同相的时间τo。该载波信号通过将来自检测器电路的输出信号延迟时间τo而形成的信号进行幅度调制，并且调幅载波信号与复合幅度调制信号组合以消除不期望的信号。

2. 发明授权

US4021749A Signal amplifying circuit 失效
标题翻译：信号放大电路
公开(公告)号：US4021749A
公开(公告)日：1977-05-03
申请号：US547583
申请日：1975-02-06
申请人： Yoshio Ishigaki , Masayuki Hongu , Takashi Okada
发明人： Yoshio Ishigaki , Masayuki Hongu , Takashi Okada
IPC分类号： H03G3/10 , H03F1/22 , H03F1/30 , H03F3/34 , H03F3/343 , H03F3/347 , H03F3/45 , H03G1/00 , H03F3/04
CPC分类号： H03F3/347 , H03F1/22 , H03F1/302 , H03F3/343 , H03F3/45479 , H03G1/0017 , H03G1/0023
摘要： A signal amplifying circuit including an amplifying transistor having its base-emitter terminals connected to a signal source. A diode having the proper characteristics is also connected across the base-emitter input terminals to produce a first reference bias voltage to be applied to the input circuit of the transistor. The emitter-collector circuit of a compensating transistor is connected in series with the emitter-collector circuit of the amplifying transistor, and a second reference bias voltage is connected between the base of the compensating transistor and the emitter of the amplifying transistor. The second reference bias voltage is produced across a plurality of diodes having the proper characteristics, whereby the current gain of the amplifier will be constant regardless of variations in the transistor characteristics.
摘要翻译：一种信号放大电路，包括其基极 - 发射极端子连接到信号源的放大晶体管。具有适当特性的二极管也连接在基极 - 发射极输入端上，以产生施加到晶体管的输入电路的第一基准偏置电压。补偿晶体管的发射极 - 集电极电路与放大晶体管的发射极 - 集电极电路串联连接，第二基准偏置电压连接在补偿晶体管的基极和放大晶体管的发射极之间。在具有适当特性的多个二极管上产生第二参考偏置电压，由此放大器的电流增益将恒定，而与晶体管特性的变化无关。

3. 发明授权

US4083019A Current controlled emitter coupled multivibrator 失效
标题翻译：电流控制发光二极管
公开(公告)号：US4083019A
公开(公告)日：1978-04-04
申请号：US546757
申请日：1976-12-01
申请人： Takeshi Hamada , Yoshio Ishigaki , Masayuki Hongu
发明人： Takeshi Hamada , Yoshio Ishigaki , Masayuki Hongu
IPC分类号： H04N5/922 , G11B20/06 , H03C3/00 , H03K3/282 , H03K7/06 , H04N5/91 , H04N5/92
CPC分类号： H04N5/92 , H03K3/2821 , H03K7/06 , H04N5/91
摘要： A multivibrator circuit has a main constant current source through which the main portion of the current of the multivibrator circuit is supplied and a by-pass current source through which a portion of the current to be supplied to the main constant current source is supplied, whereby the duty cycle of the multivibrator circuit is controlled. When the by-pass current is changed, the frequency of the multivibrator circuit is changed. The frequency of the multivibrator, when used as the frequency-modulated oscillator in a video tape recorder, may thus be set regardless of the signal clipping level and signal clamping level in a video recording circuit of the video tape recorder.

4. 发明授权

US3940708A Gain control circuit 失效
标题翻译：增益控制电路
公开(公告)号：US3940708A
公开(公告)日：1976-02-24
申请号：US549080
申请日：1975-02-11
申请人： Takao Sumi , Masayuki Hongu
发明人： Takao Sumi , Masayuki Hongu
IPC分类号： H03G3/10 , H03G1/00 , H03G3/20 , H03G3/30
CPC分类号： H03G1/0005 , H03G1/0052 , H03G3/20
摘要： A gain control circuit of the balanced type whose gain is linearly controllable over a wide range and wherein the DC level at the circuit output is maintained at a constant value regardless of variations of the controlling current. The gain control circuit is comprised of a first differential amplifier which receives an input signal differentially applied thereto, and a second differential amplifier connected in series with the first differential amplifier. Unidirectional conductors are connected to the outputs of the first differential amplifier as a load impedance and variable currents are supplied to the first differential amplifier outputs to control the currents flowing in the unidirectional conductors and thereby vary the load impedances presented by the unidirectional conductors. The amplified output signal is derived from an output of the second differential amplifier.
摘要翻译：增益在宽范围内可线性控制的平衡型增益控制电路，其中电路输出端的直流电平维持在恒定值，而与控制电流的变化无关。增益控制电路包括接收差分施加到其上的输入信号的第一差分放大器和与第一差分放大器串联连接的第二差分放大器。单向导体连接到第一差分放大器的输出作为负载阻抗，并且可变电流被提供给第一差分放大器输出以控制在单向导体中流动的电流，从而改变由单向导体呈现的负载阻抗。放大的输出信号从第二差分放大器的输出导出。

5. 发明授权

US4005371A Bias circuit for differential amplifier 失效
标题翻译：差分放大器的偏置电路
公开(公告)号：US4005371A
公开(公告)日：1977-01-25
申请号：US592215
申请日：1975-07-01
申请人： Masayuki Hongu , Masahiro Tada
发明人： Masayuki Hongu , Masahiro Tada
IPC分类号： H03F3/45
CPC分类号： H03F3/45085 , H03F2203/45596 , H03F2203/45611 , H03F2203/45622 , H03F2203/45702
摘要： A separate emitter follower type bias circuit is connected to each base electrode of a transistorized differential amplifier which handles unbalanced input signals. A series circuit of resistors is employed for supplying a suitable bias voltage common to both emitter follower type bias circuits.
摘要翻译：单独的射极跟随器型偏置电路连接到处理不平衡输入信号的晶体管差分放大器的每个基极。电阻器的串联电路用于提供两个射极跟随器型偏置电路公共的合适的偏置电压。

6. 发明授权

US3986145A Variable reactance circuit including differentially-connected transistor device providing a variable reactance input impedance 失效
标题翻译：可变电抗电路包括提供可变电抗输入阻抗的差分连接晶体管器件
公开(公告)号：US3986145A
公开(公告)日：1976-10-12
申请号：US589903
申请日：1975-06-24
申请人： Masayuki Hongu , Masahiro Tada
发明人： Masayuki Hongu , Masahiro Tada
IPC分类号： H03C3/12 , H03C3/14 , H03H11/48 , H03B5/36 , H03H11/00
CPC分类号： H03C3/145 , H03C3/12
摘要： A variable reactance circuit is composed of a differential amplifier having first and second emitter-coupled transistors, a reactance element, such as a capacitor, connected between the collector and base electrodes of the first transistor, and a control signal source connected to the emitter electrodes of the transistors by which the input impedance of the first transistor is effective as a variable reactance which is changed in accordance with the level of the control signal. Such variable reactance circuit may be used with an oscillator or resonance circuit to constitute a frequency modulator controlled by the control signal source.
摘要翻译：可变电抗电路由具有第一和第二发射极耦合晶体管的差分放大器，连接在第一晶体管的集电极和基极之间的诸如电容器的电抗元件和连接到发射极的控制信号源组成的第一晶体管的输入阻抗有效的晶体管作为根据控制信号的电平改变的可变电抗。这种可变电抗电路可以与振荡器或谐振电路一起使用，以构成由控制信号源控制的频率调制器。

7. 发明授权

US4115737A Multi-band tuner 失效
标题翻译：多频调谐器
公开(公告)号：US4115737A
公开(公告)日：1978-09-19
申请号：US851283
申请日：1977-11-14
申请人： Masayuki Hongu , Tsutomu Niimura , Hiromi Kawakami
发明人： Masayuki Hongu , Tsutomu Niimura , Hiromi Kawakami
IPC分类号： H03D7/00 , H03D7/18 , H03J5/24 , H04B1/26 , H04N5/44 , H04B1/06
CPC分类号： H04B1/006 , H03D7/00 , H03D7/18 , H03J5/244 , H04B1/005 , H04B1/26 , H04N5/44
摘要： A tuner for receiving signals broadcast on two spaced bands, each divided into several channels, has two fixed bandpass filters, one to pass all of the channels in the lower band between the lowest frequency f.sub.P of the lowest channel and the highest frequency f.sub.S of the highest channel of the lower band, and the other to pass all of the channels in the upper frequency band between the lowest frequency f.sub.T of the lowest channel and the highest frequency f.sub.W in the highest channel of the upper band. The bandwidth of each channel is f.sub.B. The tuner includes an amplifier and a third filter to which signals of either band are supplied by selective operation of a switch. The third filter has a cut-off frequency below the second harmonic of the lowest frequency of the upper band to simplify the avoidance of image interference from second harmonic signals of the band. A tunable local oscillator supplies a heterodyning signal to the mixer to convert any selected channel of the received signal to an intermediate frequency (i.f.) band, and image interference is avoided by setting the local oscillator frequency f.sub.n required to convert channel n to the i.f. at a frequency above that channel such that the lowest frequency f.sub.L of the i.f. band satisfies the following conditions: ##EQU1##
摘要翻译：用于接收在两个间隔的频带上广播的信号的调谐器，每个分成几个信道，具有两个固定带通滤波器，一个通过最低信道的最低频率fP和最低频率的最高频率fS之间的较低频带中的所有信道较低频带的最高频道，另一方通过最高频带的最低频率fT和上频段最高频道中最高频率fW之间的上频段中的所有频道。每个通道的带宽为fB。调谐器包括放大器和第三滤波器，通过开关的选择性操作来提供任一频带的信号。第三滤波器具有低于上频带最低频率的二次谐波的截止频率，以简化避免来自频带二次谐波信号的图像干扰。可调本地振荡器向混频器提供外差信号以将接收信号的任何所选信道转换为中频（i.f.）频带，并且通过将通道n转换为i.f来设置所需的本地振荡器频率fn来避免图像干扰。在该频道之上的频率处，使得i.f.的最低频率fL。带满足以下条件：（1）（2）和或（3）

8. 发明授权

US3974460A High frequency modulator, such as an amplitude modulator, including a frequency multiplier 失效
标题翻译：高频调制器，例如幅度调制器，包括倍频器
公开(公告)号：US3974460A
公开(公告)日：1976-08-10
申请号：US576737
申请日：1975-05-12
申请人： Masayuki Hongu , Tsutomu Niimura
发明人： Masayuki Hongu , Tsutomu Niimura
IPC分类号： H03B5/36 , H03B19/14 , H03C1/36 , H03C1/54 , H04N5/40 , H03C1/06
CPC分类号： H04N5/40 , H03C1/36 , H03C1/545 , H03B19/14 , H03B5/36 , H03C2200/0012 , H03C2200/0066
摘要： A high-frequency modulator circuit including a frequency multiplier comprised of a first differential amplifier for receiving a base oscillating signal and for multiplying the frequency of the base oscillating signal to thereby produce a higher frequency carrier signal; and a modulating circuit connected to the first differential amplifier for modulating the carrier signal with input information. The first differential amplifier includes a pair of output terminals; and the modulating circuit is comprised of a second and third differential amplifier, each having a pair of input terminals connected to the respective output terminals of the first differential amplifier such that the higher frequency carrier signal is applied differentially to each of the second and third differential amplifiers. The second and third differential amplifiers each includes a pair of output terminals, the second differential amplifier output terminals being connected to oppositely phased ones of the third differential amplifier output terminal. The input information is supplied to at least one of the second and third differential amplifiers to thereby vary the higher frequency carrier currents which flow therethrough.
摘要翻译：一种高频调制器电路，包括：频率乘法器，包括用于接收基本振荡信号的第一差分放大器，并且用于乘以基本振荡信号的频率，从而产生较高频率的载波信号; 以及连接到第一差分放大器的调制电路，用于利用输入信息调制载波信号。第一差分放大器包括一对输出端子; 并且调制电路包括第二和第三差分放大器，每个差分放大器具有连接到第一差分放大器的相应输出端的一对输入端，使得较高频率载波信号被差分地施加到第二和第三差分放大器第二和第三差分放大器各自包括一对输出端子，第二差分放大器输出端子连接到第三差分放大器输出端子的相对相位的输出端子。输入信息被提供给第二和第三差分放大器中的至少一个，从而改变流过其中的较高频率载波电流。

9. 发明授权

US4370676A Carrier regenerating circuit for a synchronous detector 失效
标题翻译：用于同步检测器的载波再生电路
公开(公告)号：US4370676A
公开(公告)日：1983-01-25
申请号：US277739
申请日：1981-06-26
申请人： Masayuki Hongu , Shigeru Omuro , Hiroyuki Kita , Masaharu Tokuhara
发明人： Masayuki Hongu , Shigeru Omuro , Hiroyuki Kita , Masaharu Tokuhara
IPC分类号： H03D1/22 , H04N5/455 , H04N5/44 , H03D3/18
CPC分类号： H03D1/229 , H04N5/455
摘要： A synchronous detector for detecting an information signal modulated onto a carrier, such as a video IF signal, is disclosed in which there are provided a circuit for supplying the modulated information signal in the form of a vestigial sideband signal, a filter circuit coupled to the supplying circuit which includes a tuning circuit tuned to the frequency of the carrier on which the information signal is modulated, an emitter follower circuit connected to the output of the filter circuit, a limiter circuit connected to the filter circuit, for producing a switching carrier, and a multiplier having first and second input terminals coupled to the output of the limiter circuit and to the supplying circuit, for multiplying the modulated information signal and the switching carrier to obtain said information signal. In one embodiment, the limiter circuit includes a differential amplifier having first and second transistors, base electrodes of which are connected to the emitter follower circuit, and third and fourth common base transistors, emitter electrodes of which are respectively connected to collector electrodes of the first and second transistors and collector electrodes of which provide output terminals for supplying the switching carrier.
摘要翻译：公开了一种用于检测调制到诸如视频IF信号的载波上的信息信号的同步检测器，其中提供了一种用于以残留边带信号的形式提供调制信息信号的电路，耦合到提供电路，其包括调谐到信号信号被调制的载波的频率的调谐电路，连接到滤波器电路的输出的射极跟随器电路，连接到滤波器电路的限幅器电路，用于产生开关载体，以及乘法器，其具有耦合到限幅器电路的输出和供给电路的第一和第二输入端，用于将调制信息信号和开关载波相乘以获得所述信息信号。在一个实施例中，限幅器电路包括具有第一和第二晶体管的差分放大器，其基极连接到射极跟随器电路，以及第三和第四公共基极晶体管，其发射电极分别连接到第一和第二晶体管的集电极并且其第二晶体管和集电极提供用于提供开关载体的输出端子。

10. 发明授权

US4163196A Demodulating apparatus with phase shift compensation 失效
标题翻译：具有相移补偿的解调装置
公开(公告)号：US4163196A
公开(公告)日：1979-07-31
申请号：US891279
申请日：1978-03-29
申请人： Masayuki Hongu , Masaharu Tokuhara , Yoshihiro Yamamoto , Hiromi Kawakami
发明人： Masayuki Hongu , Masaharu Tokuhara , Yoshihiro Yamamoto , Hiromi Kawakami
IPC分类号： H04N5/455 , H03D1/00 , H03D1/04 , H03D1/22 , H03D1/06 , H03D3/18
CPC分类号： H03D1/22 , H03D1/00 , H03D1/04
摘要： Demodulating apparatus for a modulated signal comprised of a carrier deriving circuit which is supplied with the modulated signal and which derives an unmodulated carrier therefrom, the carrier deriving circuit including a tuned circuit having a center frequency substantially coincident with the carrier frequency of the modulated signal and a limiter circuit in which the limiter circuit imparts a phase shift to the signal supplied thereto in connection with its elimination of the amplitude fluctuations in the signal produced by the tuned circuit. A synchronous detector receives the modulated signal and the derived carrier so as to detect the modulated signal with the derived carrier. A phase shift circuit supplies the synchronous detector with a phase shifted modulated signal, the phase shift substantially compensating for the phase shift imparted by the limited circuit in the carrier deriving circuit, whereby the modulated signal and the carrier which are applied to the synchronous detector are substantially in phase with each other.
摘要翻译：一种调制信号的解调装置，包括一个载波导出电路，该载波导出电路被提供有调制信号，并从其中导出未调制的载波，该载波导出电路包括调谐电路，该调谐电路的中心频率与调制信号的载波频率基本一致，限制器电路，其中限制器电路相对于消除由调谐电路产生的信号中的振幅波动而向所提供的信号施加相移。同步检测器接收调制信号和导出载波，以便用导出的载波检测调制信号。相移电路为同步检波器提供相移调制信号，相移基本上补偿由载波导出电路中的受限电路产生的相移，由此调制信号和施加到同步检波器的载波是基本上彼此同相。

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