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    • 2. 发明授权
    • Double-converting FM tuner
    • 双转换FM调谐器
    • US4236252A
    • 1980-11-25
    • US10019
    • 1979-02-06
    • Yasuo KominamiMasanori IenakaTakeshi WadaYukihiko MiyamotoTsuneo Yamada
    • Yasuo KominamiMasanori IenakaTakeshi WadaYukihiko MiyamotoTsuneo Yamada
    • H03D7/16H04B1/10H04B1/26H04B1/28
    • H04B1/26H03D7/161H04B1/28
    • A first intermediate frequency amplifier stage which executes the amplitude limiting operation of a double-converting FM tuner employing the integrated circuit technology is constructed in the form of an integrated circuit. An output signal of the first intermediate frequency amplifier stage is put into a square pulse waveform on the basis of the amplitude limiting operation, and therefore has higher harmonic components of high frequencies. When the higher harmonic components are injected into a second mixer circuit in a second frequency converter circuit, various higher harmonic components which have frequencies higher than a second intermediate frequency appear at the output of the second mixer conduit. When the higher harmonic components at the output of the second mixer circuit are injected into an FM demodulator circuit, beat trouble is induced. The second frequency converter circuit is also constructed in the form of an integrated circuit, and filter means to pass the fundamental waves of a first intermediate frequency signal and to reject the higher harmonic frequency components thereof is connected between the output of the first intermediate frequency amlifier stage executing the amplitude limiting operation and the input of the second mixer circuit, whereby the beat trouble can be prevented.
    • 采用集成电路技术执行双转换FM调谐器的幅度限制操作的第一中频放大器级以集成电路的形式构成。 第一中频放大器级的输出信号在幅度限制运算的基础上被置入方波脉冲波形,因此具有高频谐波分量。 当在第二变频器电路中将高次谐波分量注入第二混频器电路时,在第二混频器导管的输出处出现具有高于第二中频频率的各种高次谐波分量。 当第二混频器电路的输出端的高次谐波分量被注入到FM解调器电路中时,会引起节拍故障。 第二变频器电路也以集成电路的形式构成,滤波器装置将第一中频信号的基波通过,并将其高次谐波频率成分排除在第一中频放大器的输出端 执行振幅限制操作和第二混频器电路的输入,从而可以防止节拍故障。
    • 4. 发明授权
    • Monostable multivibrator circuit with clamped non-saturating common
emitter amplifier in feedback path
    • 单稳态多谐振荡器电路,在反馈路径中具有钳位非饱和公共发射极放大器
    • US4277703A
    • 1981-07-07
    • US2108
    • 1979-01-09
    • Takeshi WadaMasanori IenakaYukihiko MiyamotoTsuneo Yamada
    • Takeshi WadaMasanori IenakaYukihiko MiyamotoTsuneo Yamada
    • H03K3/013H03K3/02H03K3/023H03K3/0232H03K5/08H03K3/033
    • H03K3/023
    • This invention relates to a monostable multivibrator which is operated in the non-saturated state. The monostable multivibrator circuit includes a time constant circuit which has a capacitor, an amplifier circuit which receives an output signal of the time constant circuit, a positive feedback circuit which is connected between an output end of the amplifier circuit and an input end of the time constant circuit, and a trigger terminal which is disposed in a circuit loop constructed of the time constant circuit, the amplifier circuit and the positive feedback circuit; and it is characterized in that the positive feedback circuit comprises a signal amplifying transistor which has a base receiving an output of the amplifier circuit and a collector supplying a signal to the time constant circuit, and a level clamp circuit which is coupled to the collector of the transistor in order to hold a collector output potential of the transistor higher than a base input potential thereof.
    • 本发明涉及在非饱和状态下工作的单稳态多谐振荡器。 单稳态多谐振荡器电路包括具有电容器的时间常数电路,接收时间常数电路的输出信号的放大器电路,连接在放大器电路的输出端和时间常数电路的输入端之间的正反馈电路 恒定电路和触发端子,其设置在由时间常数电路,放大器电路和正反馈电路构成的电路回路中; 其特征在于,正反馈电路包括信号放大晶体管,其具有接收放大器电路的输出的基极和向时间常数电路提供信号的集电极,以及电平钳位电路,其耦合到 该晶体管为了保持晶体管的集电极输出电位高于其基极输入电位。
    • 7. 发明授权
    • Monostable multivibrator
    • 单稳态多谐振荡器
    • US4293781A
    • 1981-10-06
    • US967636
    • 1978-12-08
    • Tsuneo YamadaYukihiko Miyamoto
    • Tsuneo YamadaYukihiko Miyamoto
    • H03D3/00H03K3/02H03K3/023H03K3/0232H03K3/033H03K3/284H03K5/08H03K17/16
    • H03K3/02H03D3/00H03K3/023H03K3/033H03K3/284
    • A monostable multivibrator including a gate circuit, a driver circuit responsive to the gate circuit, a differentiating circuit responsive to the driver circuit and a voltage comparison circuit responsive to the differentiating circuit where the gate circuit has a trigger pulse applied to a first input thereof and the output of the voltage comparison circuit is fed back to a second input thereof, and where the gate circuit, the driver circuit and the voltage comparison circuit are each non-saturating and include a constant current source and where clipping circuitry clips the output of the driver circuit to lessen the effect of noise produced by the constant current sources on the output of the multivibrator. Further clipping circuitry may be employed to prevent saturation of the gate circuit. A common voltage source may provide bias voltages for at least the above clipping circuits and a threshold voltage for the voltage comparison circuit. In addition to a bias power supply for the gate circuit, the driver circuit, and the voltage comparison circuit, a further supply may supply a reference voltage for clipping the output of the gate circuit and for determining the asymptotic characteristic of the output from the differentiating circuit.
    • 一种单稳态多谐振荡器,包括门电路,响应于门电路的驱动电路,响应于驱动电路的微分电路和响应于微分电路的电压比较电路,其中门电路具有施加到其第一输入的触发脉冲, 电压比较电路的输出被反馈到其第二输入端,并且其中门电路,驱动电路和电压比较电路各自不饱和并且包括恒流源,并且其中限幅电路钳位 驱动电路,以减少由恒流源产生的噪声对多谐振荡器输出的影响。 可以采用进一步的限幅电路来防止门电路的饱和。 公共电压源可以为至少上述限幅电路提供偏置电压,并为电压比较电路提供阈值电压。 除了栅极电路,驱动电路和电压比较电路的偏置电源之外,另外的电源可以提供用于限幅门电路的输出的参考电压,并且用于确定来自差分的输出的渐近特性 电路。
    • 9. 发明授权
    • Trigger pulse forming circuit
    • 触发脉冲形成电路
    • US4223237A
    • 1980-09-16
    • US967640
    • 1978-12-08
    • Tsuneo YamadaYukihiko Miyamoto
    • Tsuneo YamadaYukihiko Miyamoto
    • H03K5/02H03K5/08
    • H03K5/02
    • A trigger pulse forming circuit comprising a first power supply; a second power supply whose voltage is less than that of the first power supply, a differential amplifier including a first transistor whose operating voltage is supplied from the first power supply and a second transistor whose operating voltage is supplied from a second power supply, at least the first transistor being adapted for application thereto of an input pulse signal; a load resistor connected to an output terminal of the first transistor; an integrating circuit connected to an output terminal of the second transistor; and a third transistor whose base and collector are connected respectively to opposite ends of the integrating circuit and its emitter is connected to the output terminal of the first transistor whereby the trigger pulse output is obtained from the output terminal of the first transistor. A diode may preferably also be included, the anode of the diode being connected to the output terminal of the second transistor and the cathode thereof being connected to the second power supply whereby the probability of the trigger pulse output saturating the transistors of the next stage is substantially lessened.
    • 一种触发脉冲形成电路,包括:第一电源; 第二电源,其电压小于第一电源的电压;差分放大器,包括第一晶体管,其工作电压从第一电源提供;以及第二晶体管,其工作电压从第二电源供应至少 所述第一晶体管适用于输入脉冲信号; 连接到第一晶体管的输出端的负载电阻; 连接到第二晶体管的输出端的积分电路; 以及第三晶体管,其基极和集电极分别连接到积分电路的相对端,并且其发射极连接到第一晶体管的输出端,由此从第一晶体管的输出端获得触发脉冲输出。 也可以包括二极管,二极管的阳极连接到第二晶体管的输出端,其阴极连接到第二电源,由此触发脉冲输出饱和下一级晶体管的概率是 大大减轻
    • 10. 发明授权
    • Monostable multivibrator
    • 单稳态多谐振荡器
    • US4254346A
    • 1981-03-03
    • US967639
    • 1978-12-08
    • Tsuneo YamadaYukihiko Miyamoto
    • Tsuneo YamadaYukihiko Miyamoto
    • H03D3/00H03K3/0232H03K3/284H03K5/01
    • H03K3/284
    • In a monostable multivibrator including a gate circuit having first and second inputs, a differentiating circuit responsive to the output of the gate circuit and a voltage comparison circuit responsive to the output of the differentiating circuit where the gate circuit is adapted to have a trigger pulse applied to the first input thereof and the output of the voltage comparison circuit fed back to the second input thereof, the improvement in the monostable multivibrator of means for setting the reference level of the trigger pulse at the first input lower than the reference level of the output of the voltage comparison circuit fed back to the second input of the gate circuit.
    • 在包括具有第一和第二输入的门电路的单稳态多谐振荡器中,响应于门电路的输出的微分电路和响应于差分电路的输出的电压比较电路,其中栅电路适于具有施加的触发脉冲 反馈到其第二输入的电压比较电路的第一输入和反馈到其第二输入的电压比较电路的输出,用于将第一输入处的触发脉冲的参考电平设置为低于输出的参考电平的装置的单稳态多谐振荡器的改进 的电压比较电路反馈到门电路的第二输入端。