专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

31. 发明授权

US4841179A Phase equalizing active filter 失效
标题翻译：相位均衡有源滤波器
公开(公告)号：US4841179A
公开(公告)日：1989-06-20
申请号：US136968
申请日：1987-12-23
申请人： Hideyuki Hagino , Takahiro Kusano
发明人： Hideyuki Hagino , Takahiro Kusano
IPC分类号： H03H11/16 , H03B11/00 , H03G5/16 , H03H11/00 , H03H11/12 , H03H11/18 , H03H11/54
CPC分类号： H03G5/165 , H03H11/1217
摘要： A first operational amplifier (OP AMP) is connected at the positive input terminal to a signal input terminal. The positive output terminal of the first OP AMP is connected to a ground through a first capacitor, and to the positive input terminal of a second OP AMP. The positive output terminal of the second OP AMP is connected to positive input terminal of the first OP AMP via a second capacitor, and to the input terminal of a buffer. The output terminal of the buffer is connected to the negative input terminal of the first OP AMP, and to the positive input terminal of the first OP AMP via the connected series of the first and second resistors. The connection point of these resistors is connected to the negative input terminal of the second OP AMP. The output terminal of the buffer is connected to a signal output terminal. When the resistances of these resistors are equal, the circuit has a phase equalizer characteristic.
摘要翻译：第一运算放大器（OP AMP）在正输入端连接到信号输入端。第一OP AMP的正输出端子通过第一电容器连接到地，并连接到第二OP AMP的正输入端子。第二OP AMP的正输出端子通过第二电容器连接到第一OP AMP的正输入端子，并连接到缓冲器的输入端子。缓冲器的输出端通过第一和第二电阻的连接系列连接到第一OP AMP的负输入端，并连接到第一OP AMP的正输入端。这些电阻的连接点连接到第二个OP AMP的负极输入端。缓冲器的输出端子连接到信号输出端子。当这些电阻的电阻相等时，电路具有相位均衡器特性。

32. 发明授权

US4602224A Variable capacitance reactance circuit 失效
标题翻译：可变容抗电路
公开(公告)号：US4602224A
公开(公告)日：1986-07-22
申请号：US684329
申请日：1984-12-20
申请人： Sohei Arimoto , Hitoshi Miyashita
发明人： Sohei Arimoto , Hitoshi Miyashita
IPC分类号： H03C3/14 , H03H11/48 , H03B5/32 , H03C3/20 , H03H11/00
CPC分类号： H03H11/483
摘要： A circuit having an effective output capacitance the value of which can be varied over a predetermined range of values includes first and second differential amplifiers. The differential inputs of the second differential amplifier are connected to the differential outputs of the first differential amplifier, the latter of which receives a variable control signal. The second differential amplifier includes a pair of transistors the emitters of which are AC coupled to ground. A capacitor is coupled between the base and collector of one of the pair of transistors, the collector of which is coupled to the output of the circuit. A diode is AC coupled between the base and ground of the one transistor whereby the impedance thereof is varied in direct relationship to the conduction of the one transistor in response to the control signal thereby causing the value of the output capacitance of the circuit to be varied.
摘要翻译：具有可以在预定值范围内变化的有效输出电容的电路包括第一和第二差分放大器。第二差分放大器的差分输入连接到第一差分放大器的差分输出，第一差分放大器接收可变控制信号。第二差分放大器包括其发射极被交流耦合到地的一对晶体管。电容器耦合在该对晶体管之一的基极和集电极之间，其集电极耦合到电路的输出端。二极管被AC耦合在一个晶体管的基极和地之间，由此其阻抗与一个晶体管的响应于控制信号的导通直接相关变化，从而导致电路的输出电容的值变化。

33. 发明授权

US4550295A Switched capacitor integrator 失效
标题翻译：开关电容积分器
公开(公告)号：US4550295A
公开(公告)日：1985-10-29
申请号：US647280
申请日：1984-09-05
申请人： Itsuo Sasaki
发明人： Itsuo Sasaki
IPC分类号： G06G7/186 , H03H19/00 , H03H11/00
CPC分类号： H03H19/004 , G06G7/1865
摘要： A switched capacitor integrator is comprised of an operational amplifier, a feedback capacitor connected between the inverting input terminal and the output terminal of the amplifier, a bias circuit for applying a given voltage to the non-inverting input terminal of the amplifier, a switched capacitor, and a switch circuit which connects the switched capacitor between the signal input terminal applied with an input voltage signal and the inverting input terminal of the amplifier in a first operation mode and short-circuits the switched capacitor in a second operation mode.
摘要翻译：开关电容积分器包括运算放大器，连接在反相输入端和放大器的输出端之间的反馈电容器，用于将给定电压施加到放大器的非反相输入端的偏置电路，开关电容器以及开关电路，其以第一操作模式将施加有输入电压信号的信号输入端子和放大器的反相输入端子之间的开关电容器连接，并且在第二操作模式下使开关电容器短路。

34. 发明授权

US4513242A Electronic impedance device for providing a variable impedance 失效
标题翻译：用于提供可变阻抗的电子阻抗装置
公开(公告)号：US4513242A
公开(公告)日：1985-04-23
申请号：US429316
申请日：1982-09-30
申请人： Fumihiko Yokogawa
发明人： Fumihiko Yokogawa
IPC分类号： H04B1/62 , G11B20/04 , H03G7/00 , H03G9/18 , H03H11/46 , H04B1/64 , H03H11/00
CPC分类号： H03H11/46 , H03G9/18
摘要： An electronic impedance device provides a variable impedance in, for example, a Dolby noise reduction system. The device includes an input terminal connected to a source of a signal voltage. A differential voltage-to-current converter circuit, having a relatively high input impedance, converts the input signal voltage into two differential output currents that are variable with the input signal voltage. A pair of p-n junction elements, such as diodes, are connected to the converter circuit via a current transfer circuit. The current transfer circuit transfers the differential output currents to the p-n junction elements. A differential current amplifier circuit is responsive to the voltage built up across the p-n junction elements. The differential current amplifier has an output terminal to produce an output current. A feedback line connects the output terminal of the amplifier circuit to the input terminal for permitting the output current of the amplifier circuit to be fed back to the input terminal of the device.
摘要翻译：电子阻抗装置在例如杜比噪声降低系统中提供可变阻抗。该装置包括连接到信号电压源的输入端。具有较高输入阻抗的差分电压 - 电流转换器电路将输入信号电压转换为可随输入信号电压变化的两个差分输出电流。一对p-n结元件（例如二极管）经由电流传输电路连接到转换器电路。电流传输电路将差分输出电流传送到p-n结元件。差分电流放大器电路响应跨越p-n结元件的电压。差分电流放大器具有输出端子以产生输出电流。反馈线将放大器电路的输出端连接到输入端，以使放大器电路的输出电流反馈到器件的输入端。

35. 发明授权

US4074215A Stable gyrator network for simularity inductance 失效
标题翻译：稳定的电动汽车网络
公开(公告)号：US4074215A
公开(公告)日：1978-02-14
申请号：US729716
申请日：1976-10-05
申请人： John M. Rollett
发明人： John M. Rollett
IPC分类号： H03H11/00 , H03H11/42 , H03H7/44
CPC分类号： H03H11/42
摘要： An unconditionally stable gyrator circuit includes two interconnected d.c. differential amplifiers. The terminals of an input port are respectively connected to the non-inverting inputs of the amplifiers, that to the second amplifier being connected through a resistor. The inverting input of the first amplifier is connected to the non-inverting input of the second, the output of the first amplifier is connected through a resistor to the inverting input of the second amplifier and the output of the second amplifier is connected through a resistor to the non-inverting input of the first amplifier. Two alternative output ports are provided between the output of the first amplifier and the non-inverting input of the second, and between the output of the second amplifier and its inverting input. The output port which is not used has a resistive impedance connected across it.

36. 发明授权

US4039981A Variable impedance circuit 失效
标题翻译：可变阻抗电路
公开(公告)号：US4039981A
公开(公告)日：1977-08-02
申请号：US672676
申请日：1976-04-01
申请人： Shin-ichi Ohashi , Akihiro Asada
发明人： Shin-ichi Ohashi , Akihiro Asada
IPC分类号： H03H11/24 , H03H5/00 , H03H11/46 , H03J3/18 , H03J3/20 , H03H5/12 , H03H11/00
CPC分类号： H03H5/12 , H03H11/46 , H03J3/185
摘要： A variable impedance circuit comprises an amplifier with a high input impedance and a high output impedance whose gain is variable in response to a control voltage, an emitter-follower transistor, and an impedance element adapted to feedback an output signal to an input terminal of the amplifier. The input terminal of the amplifier and the input terminal of the emitter-follower transistor are connected in common. The emitter-follower transistor has its output terminal connected in series with the output terminal of the amplifier through a load resistor. An impedance of the amplifier as viewed from its input terminal is multiplied by Miller effect and varied in value by the control signal to a great extent.

37. 发明授权

US4015207A Anti-reciprocal network 失效
标题翻译：反互联网
公开(公告)号：US4015207A
公开(公告)日：1977-03-29
申请号：US628591
申请日：1975-11-04
申请人： Johannes Otto Voorman
发明人： Johannes Otto Voorman
IPC分类号： H03H11/08 , H03H11/16 , H03H11/40 , H03H11/42 , H03H11/50 , H03H7/44 , H03H11/00
CPC分类号： H03H11/42
摘要： An anti-reciprocal network including at least a first and a second port each with two terminals, the ports being included in a closed loop which has at least three impedance elements. The network also includes two amplifiers which are coupled to the two ports, wherein each of the amplifiers includes a transistor.
摘要翻译：包括至少第一和第二端口的反互联网络，每个端口都具有两个端子，所述端口包括在具有至少三个阻抗元件的闭环中。网络还包括耦合到两个端口的两个放大器，其中每个放大器包括晶体管。

38. 发明授权

US3828281A Impedance simulating circuit for transmission lines 失效
标题翻译：用于传输线路的阻抗仿真电路
公开(公告)号：US3828281A
公开(公告)日：1974-08-06
申请号：US33548873
申请日：1973-02-26
申请人： LORAIN PROD CORP
发明人： CHAMBERS C
IPC分类号： H03H11/30 , H03H11/40 , H03H11/44 , H03H11/48 , H03H11/00
CPC分类号： H03H11/405 , H03H11/30 , H03H11/44 , H03H11/48
摘要： A circuit for simulating the presence of positive or negative impedances in shunt or in series with a transmission line. A voltage generating circuit generates an impedance simulating voltage and introduces that voltage in series with the transmission line. A current generating circuit generates an impedance simulating current and introduces that current in shunt with the transmission line. Current feedback circuitry controls the voltage generating circuitry in accordance with the amplitude of the signal current in the transmission line to simulate either a positive or negative series impedance. Voltage feedback circuitry controls the current generating circuitry in accordance with the signal voltage across the transmission line to simulate either a positive or negative shunt impedance. Circuitry is also provided to afford these simulated impedances in the presence of echo suppressing and impedance matching characteristics.
摘要翻译：用于模拟分流或与传输线串联的正阻抗或负阻抗的电路。电压产生电路产生阻抗模拟电压并将该电压与传输线串联。电流产生电路产生阻抗模拟电流，并将该电流与传输线分流。电流反馈电路根据传输线中的信号电流的幅度来控制电压产生电路，以模拟正或负的串联阻抗。电压反馈电路根据传输线上的信号电压控制电流产生电路，以模拟正或负分流阻抗。还提供电路以在存在回波抑制和阻抗匹配特性的情况下提供这些模拟阻抗。

39. 发明授权

US3824496A Gyrator circuits comprising operational amplifiers and oscillating utilizing same 失效
标题翻译：包括运算放大器的陀螺仪电路和使用振荡器的振荡器
公开(公告)号：US3824496A
公开(公告)日：1974-07-16
申请号：US40159173
申请日：1973-09-28
申请人： HEKIMIAN LABORATORIES INC
发明人： HEKIMIAN N
IPC分类号： H03H11/42 , H03H11/00 , H03B7/02
CPC分类号： H03H11/42
摘要： A Riordan-type gyrator circuit, consisting of two stages of differential operational amplifiers and five inductancedetermining impedances, is improved to avoid circuit latch-up at turn-on and to double the operative frequency range. The improvement involves deriving the input signal for the noninverting input terminal of the second stage from a voltage divider at the output of the first stage rather than from the same input signal applied to the non-inverting input terminal of the first stage. In addition to its gyrator function, the circuit can be modified to serve as an oscillator by employing positive feedback around the first stage. By rendering the voltage divider adjustable at the output of the first stage, the input conductance of the circuit is rendered variable between positive and negative conductances. The circuit also permits simulation of floating and mutually coupled inductors.
摘要翻译：改进了由两级差分运算放大器和五个电感确定阻抗组成的Riordan型回转器电路，以避免导通时电路闭锁并使工作频率范围翻倍。该改进涉及从第一级输出端的分压器而不是从施加到第一级的非反相输入端的相同输入信号导出第二级的非反相输入端的输入信号。除了其回转器功能之外，可以通过在第一级周围采用正反馈来将电路修改为用作振荡器。通过使分压器在第一级的输出端可调，电路的输入电导在正和负电导之间变化。该电路还允许模拟浮动和相互耦合的电感器。

40. 发明授权

US3808564A Semiconductor impedance conversion circuit and applications thereof 失效
标题翻译：半导体阻抗转换电路及其应用
公开(公告)号：US3808564A
公开(公告)日：1974-04-30
申请号：US28316372
申请日：1972-08-23
申请人： MITSUMI ELECTRIC CO
发明人： INOUE K , BABA M , MIYATA T , HAMADA S
IPC分类号： H03B5/24 , H03B7/06 , H03H11/40 , H03H11/42 , H03H11/44 , H04B3/18 , H03H11/00
CPC分类号： H03H11/44 , H03B5/24 , H03B7/06 , H03H11/40 , H03H11/42 , H04B3/18
摘要： A semiconductor impedance conversion circuit which employs a semiconductor circuit consisting of two transistors, four inpedance elements or circuits, a DC voltage source and a DC current source and in which a negative impedance conversion function and a gyrator function are obtained between two terminals. An oscillator employing the above semiconductor impedance conversion circuit and an oscillating capacitor. A frequency modulator employing the above semiconductor impedance conversion circuit, an oscillating capacitor and a modulating signal source.
摘要翻译：一种半导体阻抗转换电路，其采用由两个晶体管，四个阻抗元件或电路组成的半导体电路，DC电压源和DC电流源，并且其中在两个端子之间获得负阻抗转换功能和回转器功能。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式