Amplifier
    21.
    发明授权
    Amplifier 失效
    放大器

    公开(公告)号:US4128813A

    公开(公告)日:1978-12-05

    申请号:US852971

    申请日:1977-11-18

    摘要: An amplifier comprised of a field effect transistor whose gate electrode is adapted to receive an input signal. An impedance converter couples the input signal to the gate electrode of the field effect transistor, the impedance converter being formed of n impedance converting stages, each stage having a relatively low output impedance. A voltage limiting circuit is connected between the source of input signal and the gate electrode of the field effect transistor so as to limit the forward biasing of the field effect transistor. This voltage limiting circuit includes m voltage-limiting elements, wherein n and m are integers (1, 2, 3, . . . ) and n is equal to or greater than m. In a preferred embodiment, the amplifier is formed of two field effect transistors connected in push-pull relation, each field effect transistor being provided with an impedance converter and a voltage-limiting circuit as described above.

    摘要翻译: 放大器,由场效应晶体管组成,其栅极适于接收输入信号。 阻抗转换器将输入信号耦合到场效应晶体管的栅电极,阻抗转换器由n个阻抗转换级形成,每级具有相对低的输出阻抗。 电压限制电路连接在输入信号源和场效应晶体管的栅电极之间,以限制场效应晶体管的正向偏置。 该电压限制电路包括m个电压限制元件,其中n和m是整数(1,2,3等),n等于或大于m。 在优选实施例中,放大器由以推挽关系连接的两个场效应晶体管形成,每个场效应晶体管设置有如上所述的阻抗转换器和限压电路。

    Amplifier with field effect transistors having triode-type dynamic
characteristics
    22.
    发明授权
    Amplifier with field effect transistors having triode-type dynamic characteristics 失效
    具有三极管型动态特性的场效应晶体管的放大器

    公开(公告)号:US4021748A

    公开(公告)日:1977-05-03

    申请号:US641981

    申请日:1975-12-18

    IPC分类号: H03F3/20 H03F3/217 H03F3/26

    CPC分类号: H03F3/217 H03F3/2171

    摘要: An amplifier having ready application as an amplifier for pulse width modulated signals, is comprised of first and second field effect transistor devices which exhibit triode-type dynamic characteristics. These field effect transistor devices are connected in push-pull amplifying relation for receiving a signal to be amplified and for supplying an amplified signal to a load. A low-pass filter device connects the load to the push-pull field effect transistor devices. The output terminals of the field effect transistor devices are connected in series across a voltage supply which is used to supply the energizing voltages to the transistor devices.

    摘要翻译: 作为脉冲宽度调制信号放大器的放大器具有准备应用,由具有三极管型动态特性的第一和第二场效应晶体管器件组成。 这些场效应晶体管器件以推挽放大关系连接,用于接收待放大的信号,并将放大的信号提供给负载。 低通滤波器装置将负载连接到推挽场效应晶体管器件。 场效应晶体管器件的输出端子串联连接用于向晶体管器件提供激励电压的电压源。

    Transistor amplifier having field effect transistors with stabilized
drain bias current
    23.
    发明授权
    Transistor amplifier having field effect transistors with stabilized drain bias current 失效
    晶体管放大器具有稳定的漏极偏置电流的场效应晶体管

    公开(公告)号:US4021746A

    公开(公告)日:1977-05-03

    申请号:US630330

    申请日:1975-11-10

    申请人: Tadao Suzuki

    发明人: Tadao Suzuki

    CPC分类号: H03F1/306 H03F3/3044

    摘要: A transistor amplifier is comprised of a first differential amplifier for receiving an input signal and a second differential amplifier coupled to the output of the first differential amplifier. An output stage is coupled to the second differential amplifier and is comprised of a pair of complementary field effect transistors connected in push-pull configuration. Each of the field effect transistors has triode-type dynamic characteristics and is adapted to receive both a bias voltage and an amplified signal from the output of the second differential amplifier. Changes in the operating voltage supplied to the field effect transistors are injected into one of the differential amplifiers so as to effect a corresponding change in the bias voltage which is applied to the field effect transistors. This bias voltage change compensates for changes in the operating voltage so as to stabilize the field effect transistor drain currents at a constant value notwithstanding these operating voltage changes.

    摘要翻译: 晶体管放大器包括用于接收输入信号的第一差分放大器和耦合到第一差分放大器的输出的第二差分放大器。 输出级耦合到第二差分放大器,并且包括以推挽配置连接的一对互补场效应晶体管。 每个场效应晶体管具有三极管型动态特性,并且适于从第二差分放大器的输出接收偏置电压和放大信号。 提供给场效应晶体管的工作电压的变化被注入到一个差分放大器中,以实现施加到场效应晶体管的偏置电压的相应变化。 该偏置电压变化补偿了工作电压的变化,以便即使这些工作电压变化,场效应晶体管漏极电流稳定在恒定值。

    Pulse width modulated signal amplifier
    24.
    发明授权
    Pulse width modulated signal amplifier 失效
    脉宽调制信号放大器

    公开(公告)号:US4021745A

    公开(公告)日:1977-05-03

    申请号:US641244

    申请日:1975-12-16

    CPC分类号: H03F3/217 H03K7/02

    摘要: A pulse width modulated signal amplifier includes a first input terminal supplied with a rectangular wave signal as a carrier, a second input terminal supplied with a modulating signal, such as an audio signal, an integrator supplied with both the rectangular wave signal and the modulating signal, a high gain amplifier receiving the output of the integrator, a low pass filter receiving the output of the high gain amplifier and producing a demodulated signal corresponding to the modulating signal and which is supplied to an output terminal, and a negative feedback circuit connected between the output of the high gain amplifier and the input of the integrator.

    摘要翻译: 脉宽调制信号放大器包括提供有作为载波的矩形波信号的第一输入端,提供有诸如音频信号的调制信号的第二输入端,提供有矩形波信号和调制信号两者的积分器 接收积分器的输出的高增益放大器,接收高增益放大器的输出的低通滤波器,产生对应于调制信号的解调信号,并将其提供给输出端;以及负反馈电路,其连接在 高增益放大器的输出和积分器的输入。

    Dial type switch mechanism
    30.
    发明授权
    Dial type switch mechanism 有权
    拨号式开关机构

    公开(公告)号:US07348503B2

    公开(公告)日:2008-03-25

    申请号:US11587276

    申请日:2005-04-27

    IPC分类号: H01H19/00

    摘要: A dial type switch mechanism is developed in which an installation space can be made as small as possible. In a dial type switch mechanism (10) furnished with a push type switch part provided in its center, and a dial switch part which operates a dial fitted around the push type switch part, there are provided: a substantially cylindrical dial knob (21), in the center of which a cavity is provided for the push type switch part to be installed; a ring-shaped joint ring (23), which is supported such that it can rotate freely relative to a front panel (6) and connects and rotates together with the dial knob (21); and a rotary bracket (24), which is joined to the joint ring (23), and in which a switch rotation shaft (24b) that operates the dial type switch part is connected together with a ring-shaped member (24a) via an arm (24c).

    摘要翻译: 开发了可以使安装空间尽可能小的拨盘式开关机构。 在配备有设置在其中心的按压式开关部件的拨号式开关机构(10)中,以及操作安装在推压型开关部件周围的拨盘的拨盘开关部件,设置有:大致圆筒形的拨盘旋钮(21) 在其中央设置有用于要安装的推动式开关部件的空腔; 环形接头环(23),其被支撑成使得其能够相对于前面板(6)自由旋转并与拨盘旋钮(21)一起旋转; 以及旋转支架(24),其连接到所述接合环(23),并且其中操作所述拨盘式开关部件的开关旋转轴(24b)与环形部件(24a)连接在一起, 通过臂(24c)。