公开(公告)号：US5483197A

公开(公告)日：1996-01-09

申请号：US313921

申请日：1994-09-26

申请人： Kei Nishioka ,  Masanori Fujisawa ,  Katsumi Kusaba

发明人： Kei Nishioka ,  Masanori Fujisawa ,  Katsumi Kusaba

IPC分类号： H03F1/02 ,  H03F3/217 ,  H03F3/30

CPC分类号： H03F1/0233 ,  H03F3/2173

摘要： The present invention includes a first amplifier, a second amplifier, a switching circuit for switching power from a power source line at a frequency exceeding an audible frequency and feeding the first or second amplifier, a control circuit for controlling a switching period of the switching circuit such that the feeding power is changed correspondingly to a level of the audio signal correspondingly to a first difference in voltage between one of the audio signal and the audio signal amplified by the amplifier and the power or a second difference in voltage between one of the audio signal and the audio signal amplified by the second amplifier and the feeding power, a smoothing circuit for smoothing a power fed by said switching circuit and a capacitor adapted to be charged by a portion of current flowing from said smoothing circuit when the switching circuit is in OFF state and generating discharge current to be added to the output of one of the first and second output stage amplifiers when the switching circuit is in ON state, a loud speaker being driven by outputs of the first and second amplifiers.

摘要翻译： 本发明包括第一放大器，第二放大器，用于以超过可听频率的频率切换来自电源线的电力的开关电路，并且馈送第一或第二放大器，用于控制开关电路的开关周期的控制电路 使得馈送功率相应于音频信号的电平相应地改变，其中音频信号的电平对应于由放大器放大的音频信号和音频信号之一之间的电压的第一差异，以及音频之一之间的功率或第二电压差 信号和由第二放大器放大的音频信号和馈送功率;平滑电路，用于平滑由所述开关电路馈送的电力;以及电容器，适于在所述开关电路处于所述开关电路时由所述平滑电路流过的一部分电流充电 OFF状态，并且产生要添加到第一和第二输出级放大器之一的输出的放电电流 当开关电路处于接通状态时，扬声器由第一和第二放大器的输出驱动。

公开(公告)号：US5978487A

公开(公告)日：1999-11-02

申请号：US763794

申请日：1996-12-11

申请人： Katsumi Kusaba

发明人： Katsumi Kusaba

IPC分类号： G09F27/00 ,  H03F1/02 ,  H03F3/45 ,  H03G1/00 ,  H03H11/04 ,  H04S7/00 ,  H04R29/00

CPC分类号： H04S7/40 ,  H04S7/307

摘要： A spectrum display device for audio use includes a first differential amplifier circuit and a first capacitor forming a low pass filter. A second differential amplifier circuit and a second capacitor form high pass filter; A band pass filter circuit is formed by the low pass filter and the high pass filter; A band selection circuit selectively sets a frequency band of the band pass filter circuit out of a plurality of predetermined frequency bands through selective setting of the operating currents of the first and second differential amplifier circuits.

摘要翻译： 用于音频的频谱显示装置包括第一差分放大器电路和形成低通滤波器的第一电容器。 第二差分放大器电路和第二电容器形成高通滤波器; 带通滤波器电路由低通滤波器和高通滤波器形成; 频带选择电路通过选择性地设置第一和第二差分放大器电路的工作电流，选择性地将带通滤波器电路的频带设置在多个预定频带之外。

公开(公告)号：US5644217A

公开(公告)日：1997-07-01

申请号：US614315

申请日：1996-03-12

申请人： Katsumi Kusaba

发明人： Katsumi Kusaba

IPC分类号： H03K19/086 ,  G05F3/22 ,  H03K19/0175 ,  H03K19/018 ,  G05F3/20

CPC分类号： G05F3/222

摘要： An ECL output circuit includes an emitter differential pair of transistors, a positive voltage source connected to the collectors of this pair of transistors, a reference voltage source, a constant current supplying circuit, and an output circuit. The emitter differential pair of transistors has their emitters connected together, the base of one of them is connected to an input terminal where an input voltage is adapted to be applied, the reference voltage source is adapted to apply a reference voltage to the base of the other of the pair of transistors, and the positive voltage source is connected to their collectors.

摘要翻译： ECL输出电路包括发射极差分对晶体管，连接到该对晶体管的集电极的正电压源，参考电压源，恒流供应电路和输出电路。 晶体管的发射极差对将其发射极连接在一起，其中一个的基极连接到输入电压适于施加的输入端，参考电压源适于将参考电压施加到 另一对晶体管，正电压源连接到它们的集电极。

公开(公告)号：US5479134A

公开(公告)日：1995-12-26

申请号：US308457

申请日：1994-09-19

申请人： Kei Nishioka ,  Masanori Fujisawa ,  Katsumi Kusaba

发明人： Kei Nishioka ,  Masanori Fujisawa ,  Katsumi Kusaba

IPC分类号： H03F1/02 ,  H03F3/217 ,  H03F3/30

CPC分类号： H03F3/2173 ,  H03F1/0233

摘要： The present invention includes a first push-pull amplifier for amplifying an audio signal, a second push-pull amplifier for inverting and amplifying the audio signal, a switching circuit for switching power from a power source line at a frequency exceeding an audible frequency and feeding the first or second amplifier, a control circuit for controlling a switching period of the switching circuit such that the feeding power is changed correspondingly to a level of the audio signal correspondingly to a first difference in voltage between one of the audio signal and the audio signal amplified by the amplifier and the power or a second difference in voltage between one of the audio signal and the audio signal amplified by the second amplifier and the feeding power and a capacitor provided between the outputs of the first and second amplifiers, a loud speaker being driven by outputs of the first and second amplifiers.

摘要翻译： 本发明包括用于放大音频信号的第一推挽放大器，用于反转和放大音频信号的第二推挽放大器，用于以超过可听频率的频率从电源线切换电力的开关电路， 第一或第二放大器，用于控制开关电路的开关周期的控制电路，使得馈送功率对应于音频信号的电平相应于音频信号和音频信号中的一个之间的电压的第一差异而改变 通过放大器放大的功率或第二放大器放大的音频信号和音频信号之间的功率或电压之间的第二差异，以及设置在第一和第二放大器的输出之间的电容器和扬声器， 由第一和第二放大器的输出驱动。