-
公开(公告)号：US4539491A
公开(公告)日：1985-09-03
申请号：US399048
申请日：1982-07-16
摘要： A voltage/current conversion circuit giving an output current which is proportional to an input voltage. The circuit includes an operational amplifier to one input of which the input voltage is applied, first and second transistors, to the commonly connected bases of which the output of the operational amplifier is applied, and a feed-back path connecting the collector of the first transistor to the other input of the operational amplifier. With the circuit thus constructed, the output derived from the collector of the second transistor is in proportion to the input voltage.
摘要翻译： 给出与输入电压成比例的输出电流的电压/电流转换电路。 该电路包括一个运算放大器，其中施加输入电压的一个输入端，第一和第二晶体管，连接到运算放大器的输出的共同连接的基极，以及连接第一和第二晶体管的集电极的反馈路径 晶体管到运算放大器的另一个输入。 利用如此构造的电路，从第二晶体管的集电极得到的输出与输入电压成比例。
-
公开(公告)号：US4456886A
公开(公告)日：1984-06-26
申请号：US387894
申请日：1982-06-14
CPC分类号： H03G1/0005 , H03G1/0023
摘要： A voltage controlled attenuator includes a control circuit having variable impedance means whose impedance varies in a stepwise fashion as an input voltage is varied. In this manner, the attenuation characteristic of the attenuator can be made to vary stepwise in slope or inclination to improve its efficacy for use as a volume control device in audio apparatus.
摘要翻译： 电压控制衰减器包括具有可变阻抗装置的控制电路，其阻抗随着输入电压的变化而以逐步的方式变化。 以这种方式，可以使衰减器的衰减特性在斜率或倾斜度上逐步变化，以提高其用作音频设备中的音量控制装置的功效。
-
公开(公告)号：US4451800A
公开(公告)日：1984-05-29
申请号：US304464
申请日：1981-09-22
申请人： Akira Nishioka , Yoshihiro Kawanabe
发明人： Akira Nishioka , Yoshihiro Kawanabe
CPC分类号： H03F1/56
摘要： In feedback type amplifier including a differential transistor pair, the bias current to at least one of the differential transistors is provided by a source of current proportional to the DC currents through the differential pair, a first transistor connected in series with the current source and having its base coupled to the base of a second opposite conductivity type transistor so that both will conduct the same current, and a further transistor of the opposite conductivity type which is connected in series with the second transistor and provides its base current to one of the differential transistors.
摘要翻译： 在包括差分晶体管对的反馈型放大器中，至少一个差分晶体管的偏置电流由与通过差分对的直流电流成比例的电流源提供，第一晶体管与电流源串联连接，并具有 其基极耦合到第二相反导电型晶体管的基极，使得两者将导通相同的电流，以及与第二晶体管串联连接的相反导电类型的另一晶体管，并将其基极电流提供给差分 晶体管。
-
公开(公告)号：US4426626A
公开(公告)日：1984-01-17
申请号：US282693
申请日：1981-07-13
申请人： Yoshihiro Kawanabe
发明人： Yoshihiro Kawanabe
CPC分类号： H03K17/6257 , H03F3/3076 , H03F3/68 , H03F3/72
摘要： A signal switching circuit in which distortion caused by non-linearity of a signal path between a control electrode of an output transistor and a common junction output terminal is eliminated. The switching circuit includes plural amplifiers with outputs of the amplifiers being coupled to a common junction point and with a control signal coupled to each amplifier for enabling or disabling the amplifier. A by-pass impedance element having a linear voltage-current characteristic is coupled between the control electrode of each transistor and the common output junction point.
摘要翻译： 消除了由输出晶体管的控制电极和公共结输出端子之间的信号路径的非线性引起的失真的信号切换电路。 开关电路包括多个放大器，其放大器的输出耦合到公共连接点，并且耦合到每个放大器的控制信号以使能或禁用放大器。 具有线性电压 - 电流特性的旁路阻抗元件耦合在每个晶体管的控制电极和公共输出连接点之间。
-
公开(公告)号：US4881041A
公开(公告)日：1989-11-14
申请号：US192984
申请日：1988-05-12
申请人： Yoshihiro Kawanabe , Kazunaga Ida
发明人： Yoshihiro Kawanabe , Kazunaga Ida
CPC分类号： H03K3/017 , H03K5/1565 , H04L25/242
摘要： A pulse width distortion correction circuit in which a digital input signal has its leading and trailing edges smoothed, is added to an analog pulse width control signal and compared to a reference voltage to provide a digital output signal with a corrected duty ratio. A duty ratio detection circuit detects the duty ratio of the digital output signal and provides the corresponding pulse width control signal so as to cause the duty ratio to assume a value of 50%.
摘要翻译： 将数字输入信号的前沿和后沿平滑化的脉宽失真校正电路加到模拟脉冲宽度控制信号上，并与参考电压进行比较，以提供具有校正占空比的数字输出信号。 占空比检测电路检测数字输出信号的占空比，并提供对应的脉冲宽度控制信号，以使占空比为50％的值。
-
公开(公告)号：US4274060A
公开(公告)日：1981-06-16
申请号：US93561
申请日：1979-11-13
申请人： Yoshihiro Kawanabe
发明人： Yoshihiro Kawanabe
CPC分类号： H03F3/4521 , H03F1/34 , H03F3/3076 , H03F3/72 , H03F2203/45506
摘要： A signal change-over amplifier for an FM receiver for switching over between AM and FM receiving modes without the addition of frequency response distortion or pop noise. The amplifier circuit includes two input signal control sections each of which includes a differential transistor pair. Activating current is fed to the emitters of the differential transistor pairs by a constant current source which is activated in response to the input control signal. The collectors of the transistor of the two input control sections are interconnected. The base of one transistor of one pair is coupled to the base of the corresponding transistor of the other pair. The input information-bearing signals are coupled to the bases of the other transistors in the two pairs. The interconnected collectors are coupled respectively to a transistor pair in an output section to which current is fed by a current mirror circuit. The final output is provided by a push-pull circuit. Feedback is provided between the output section and the two input sections through a resistor pair coupled between the output terminal of the push-pull pair and the interconnected bases of the input signal control sections.
摘要翻译： 用于FM接收机的信号转换放大器，用于在AM和FM接收模式之间切换，而不增加频率响应失真或弹奏噪声。 放大器电路包括两个输入信号控制部分，每个输入信号控制部分包括差分晶体管对。 通过恒定电流源将激活电流馈送到差分晶体管对的发射极，恒定电流源响应于输入控制信号被激活。 两个输入控制部分的晶体管的集电极互连。 一对晶体管的基极耦合到另一对晶体管的基极。 输入信息承载信号耦合到两对中的其它晶体管的基极。 互连的集电极分别耦合到输出部分中的晶体管对，由电流镜电路馈送电流。 最终输出由推挽电路提供。 通过耦合在推挽对的输出端子和输入信号控制部分的互连基座之间的电阻器，在输出部分和两个输入部分之间提供反馈。
-
公开(公告)号：US4215318A
公开(公告)日：1980-07-29
申请号：US967534
申请日：1978-12-07
申请人： Yoshihiro Kawanabe
发明人： Yoshihiro Kawanabe
CPC分类号： H03F1/3217 , H03F1/52
摘要： A push-pull amplifier having a pair of output transistors and a pair of emitter coupled resistors, one terminal of each resistor coupled to an emitter of a respective transistor and the other terminals being commonly connected to an output point. A comparison circuit is employed for comparing the voltages across each of the emitter resistors with a predetermined voltage. A bias circuit is connected in series between the bases of the output transistors and a short circuit controlled by the output of the comparison circuit selectively shorts a resistor element in the bias circuit.
摘要翻译： 一种具有一对输出晶体管和一对发射极耦合电阻器的推挽放大器，每个电阻器的一个端子耦合到相应晶体管的发射极，而另一个端子共同连接到输出点。 使用比较电路来将每个发射极电阻器上的电压与预定电压进行比较。 偏置电路串联在输出晶体管的基极之间，由比较电路的输出控制的短路选择性地短路偏置电路中的电阻元件。
-
公开(公告)号：US07139830B2
公开(公告)日：2006-11-21
申请号：US09773339
申请日：2001-01-31
申请人： Takeshi Sato , Yoshihiro Kawanabe , Satoru Abe
发明人： Takeshi Sato , Yoshihiro Kawanabe , Satoru Abe
IPC分类号： G06F15/16
摘要： A communication apparatus and a congestion regulation control method which execute regulation control at the time of congestion, thereby improving communication quality. A congestion monitor monitors a congestion state, sets a congestion level and determines whether or not to perform regulation based on the congestion level. Traffic measuring unit measures the number of received signals as a traffic intensity. A traffic comparitor compares the traffic intensity with a preset traffic-regulation start traffic intensity when it is determined that regulation is to be performed. A regulation control means performs traffic regulation control when a comparison result shows that the traffic intensity is equal to or greater than the traffic-regulation start traffic intensity, and performs regulation control on a maintenance and operation process when the traffic intensity is smaller than the traffic-regulation start traffic intensity.
摘要翻译： 一种在拥塞时执行调节控制的通信装置和拥塞调节控制方法，从而提高通信质量。 拥塞监视器监视拥塞状态，设置拥塞级别，并确定是否基于拥塞级别执行调节。 流量测量单元测量接收信号的数量作为交通强度。 当确定要执行调节时，交通比较器将交通强度与预设的交通规则开始交通强度进行比较。 当比较结果表示交通强度等于或大于交通规则开始交通强度时，调节控制装置执行交通调节控制，并且当交通强度小于交通流量时，对维护和运行处理进行调节控制 监管启动交通强度。
-
公开(公告)号：US5815560A
公开(公告)日：1998-09-29
申请号：US483546
申请日：1995-06-07
CPC分类号： H04M15/765 , H04M15/00 , H04M15/77 , H04M15/8044 , H04M2215/42 , H04M2215/724 , H04M2215/7254 , H04M2215/745
摘要： The present invention relates to a communication service control apparatus for controlling communication services in the public network, private network or a network such as a virtual private network not accompanied by geographical conditions or physical conditions such as apparatus and more particularly to a communication service control apparatus for controlling the charging process for the communication services. The service control apparatus 2 comprises an information supply means 21 for supplying a charging control information including charging conditions about a plurality of customers for demanding the tariff of communication services, a charging decision means 22 for deciding, based on the charging control information, to charge for the predetermined customer among the plural customers, and a charging recording means 23 for recording charging result information based on the charging decision means. Therefore, according to the communication service control apparatus of the present invention, since the tariff demanding customers are determined when a communication service is executed, flexible charging can be realized and charging information can be concentrically controlled and managed.
摘要翻译： 本发明涉及一种通信服务控制装置，用于控制公共网络，私有网络或诸如虚拟专用网络之类的网络的通信服务，该虚拟专用网络不伴随诸如设备的地理条件或物理条件，更具体地涉及通信服务控制装置 用于控制通信服务的计费过程。 服务控制装置2包括：信息提供装置21，用于提供包括关于多个客户的收费条件的充电控制信息，用于要求通信服务的关税;充电决定装置22，用于基于充电控制信息来计费 用于多个客户中的预定客户，以及用于基于充电决定装置记录充电结果信息的充电记录装置23。 因此，根据本发明的通信服务控制装置，由于在执行通信服务时确定关税要求的客户，可以实现灵活的计费，并且可以同时控制和管理计费信息。
-
公开(公告)号：US4254379A
公开(公告)日：1981-03-03
申请号：US12421
申请日：1979-02-15
申请人： Yoshihiro Kawanabe
发明人： Yoshihiro Kawanabe
CPC分类号： H03F3/3071
摘要： A push-pull amplifier circuit comprises first and second output transistors whose emitters are commonly connected respectively through resistors to an output point, together with base biasing circuits connected between the bases of the first and second output transistors, to perform push-pull operation. The base biasing circuits comprise first and second current detecting elements for detecting the currents of the first and second output transistors, first and second variable bias generators controlled by the first and second current detecting element and reference bias generators. The operations of the first and second output transistors are effected in the active regions at all times.
摘要翻译： 推挽放大器电路包括第一和第二输出晶体管，其发射极通过电阻器共同地连接到输出点，以及连接在第一和第二输出晶体管的基极之间的基极偏置电路，以执行推挽操作。 基极偏置电路包括用于检测第一和第二输出晶体管的电流的第一和第二电流检测元件，由第一和第二电流检测元件和参考偏置发生器控制的第一和第二可变偏压发生器。 第一和第二输出晶体管的操作始终在有源区域中实现。
-
-
-
-
-
-
-
-
-
搜索结果
11 条记录 (耗时 0.021 秒)
