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    • 4. 发明授权
    • Amplifier arrangement
    • 放大器布置
    • US4706039A
    • 1987-11-10
    • US838729
    • 1986-03-11
    • Eise C. DijkmansJoseph G. G. RaetsNorbert J. L. Philips
    • Eise C. DijkmansJoseph G. G. RaetsNorbert J. L. Philips
    • H03F3/30H03F1/02H03F3/20H03F3/213H03G3/30
    • H03F1/0244
    • A class-G amplifier comprises first, second and third terminals connected to a load, first supply voltage (V.sub.1) and second supply voltage (V.sub.2), respectively, where V.sub.2 >V.sub.1. First (T.sub.1) and second (T.sub.2) transistors are series-connected between the first and third terminals with the collector of T.sub.1 coupled via first diode (D.sub.1) to the second terminal. A third emitter follower transistor (T.sub.3) has a B/E junction coupled between a signal input terminal and base of T.sub.1. A first current source (5) couples the third terminal and third transistor. A driver circuit includes a first current path between the third terminal and emitter of T.sub.3 comprising, in series, a second current source (7), a fourth transistor (T.sub.5) and second diode (D.sub.4). A second current path between a junction point (3) and common point (11) comprises, in series, third (D.sub.2) and fourth (D.sub.3) diodes and a third current source (8). Base of fourth transistor is connected to junction (9) and its collector is connected to third current source via fifth diode (D.sub.5). A low input voltage cuts off second transistior so first transistor connected to second terminal. Above a given voltage, driver circuit turns second transistor on so first transistor connected to third terminal. The output (2) thereby attains a voltage equal to second supply voltage (V.sub.2) minus one B/E voltage.
    • G类放大器包括分别连接到负载的第一,第二和第三端子,其中V2> V1分别是第一电源电压(V1)和第二电源电压(V2)。 第一(T1)和第二(T2)晶体管串联在第一和第三端子之间,T1的集电极经由第一二极管(D1)耦合到第二端子。 第三射极跟随器晶体管(T3)具有耦合在信号输入端和T1基极之间的B / E结。 第一电流源(5)耦合第三端子和第三晶体管。 驱动器电路包括在T3的第三端子和发射极之间的第一电流路径,其包括串联的第二电流源(7),第四晶体管(T5)和第二二极管(D4)。 连接点(3)和公共点(11)之间的第二电流路径包括串联的第三(D2)和第四(D3)二极管和第三电流源(8)。 第四晶体管的基极连接到结(9),其集电极通过第五二极管(D5)连接到第三电流源。 低输入电压切断第二转换器,因此第一晶体管连接到第二端子。 在给定电压以上,驱动电路使第二晶体管导通,因此第一晶体管连接到第三端。 输出(2)由此获得等于第二电源电压(V2)减去一个B / E电压的电压。
    • 5. 发明授权
    • High efficiency amplifier having a bootstrap capacitor
    • 具有自举电容器的高效放大器
    • US4706035A
    • 1987-11-10
    • US838728
    • 1986-03-11
    • Eise C. DijkmansJoseph G. G. RaetsNorbert J. L. Philips
    • Eise C. DijkmansJoseph G. G. RaetsNorbert J. L. Philips
    • H03F3/30H03F1/02H03F3/20H03G3/30H03F1/38
    • H03F1/0244H03F1/0233
    • A high-efficiency class-G type amplifier comprises a first transistor (T.sub.1), having its collector connected to a first supply voltage (V.sub.1) via a first diode (D.sub.1) and a second transistor (T.sub.2), connected in series with the first transistor and which has its collector connected to a second supply voltage (V.sub.2). The series arrangement of a second (D.sub.2), a third (D.sub.3) and a fourth diode (D.sub.4) is connected between the bases of the first and the second transistor (T.sub.1, T.sub.2) the fourth diode (D.sub.4) is poled in a direction opposite to that of the second (D.sub.2) and the third diode (D.sub.3). The series arrangement of a first resistor (R.sub.1) and the emitter-collector path of a first current-source transistor (T.sub.4) connects the second supply voltage to the anode of the fourth diode (D.sub.4). The junction point (5) between the first resistor (R.sub.1) and the current-source transistor (T.sub.4) is connected to the output (2) by means of a capacitor (C.sub.1). This arrangment drives the output to a voltage substantially equal to the second supply voltage (V.sub.2).
    • 高效率的G类放大器包括第一晶体管(T1),其第一晶体管(T1)经由第一二极管(D1)和第二晶体管(T2)与第一电源电压(V1)连接,与第一晶体管 晶体管,其集电极连接到第二电源电压(V2)。 第二(D2),第三(D3)和第四二极管(D4)的串联布置连接在第一和第二晶体管(T1,T2)的基极之间,第四二极管(D4)在方向 与第二(D2)和第三二极管(D3)的相反。 第一电阻(R1)和第一电流源晶体管(T4)的发射极 - 集电极路径的串联布置将第二电源电压连接到第四二极管(D4)的阳极。 第一电阻器(R1)和电流源晶体管(T4)之间的连接点(5)通过电容器(C1)连接到输出端(2)。 该布置将输出驱动到基本上等于第二电源电压(V2)的电压。
    • 10. 发明授权
    • Integrated circuit having an output stage with a Miller capacitor
    • 具有输出级的集成电路具有米勒电容器
    • US5587678A
    • 1996-12-24
    • US437750
    • 1995-05-09
    • Eise C. Dijkmans
    • Eise C. Dijkmans
    • H03K17/16H03K17/687H03K19/003H03K19/0175H03K19/0948H03F3/26
    • H03K19/00361
    • An integrated circuit, includes an output stage with an input which is coupled to a first and a second gate of an NMOS transistor and a PMOS transistor, respectively, and an output which is connected to a first and a second supply terminal via the PMOS transistor and the NMOS transistor, respectively. The output is coupled to the first gate via a series connection of a Miller capacitor and a switching circuit. The Miller capacitor limits the rate of increase of the voltage on the output, thus preventing interference. The switching circuit is rendered non-conductive ahead of the switching over from logic low to logic high. This prevents sudden discharging of the Miller capacitor which would otherwise cause interference itself.
    • 一种集成电路,包括输出级,输出端分别耦合到NMOS晶体管和PMOS晶体管的第一和第二栅极,以及经由PMOS晶体管连接到第一和第二电源端的输出端 和NMOS晶体管。 输出通过米勒电容器和开关电路的串联连接耦合到第一门极。 米勒电容器限制输出电压的增加速率,从而防止干扰。 切换电路在从逻辑低电平切换到逻辑高电平之前变为不导通。 这样可以防止米勒电容的突然放电,否则会造成本身的干扰。