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1. 发明授权

US5028884A Leapfrog filter having adjustable center frequency and quality factor 失效
标题翻译： Leapfrog滤波器具有可调节的中心频率和品质因数
公开(公告)号：US5028884A
公开(公告)日：1991-07-02
申请号：US527575
申请日：1990-05-23
申请人： Hiroshi Kondo , Tsuneo Tohyama , Takeyuki Kouti
发明人： Hiroshi Kondo , Tsuneo Tohyama , Takeyuki Kouti
IPC分类号： H03H11/04 , H03H11/12
CPC分类号： H03H11/126
摘要： A leapfrog filter comprising a first and a second integrator each consisting of an operational amplifier and integrating capacitor. The leapfrog filter includes differential amplifier which is arranged to differentially supply current to the first and second integrators through a first and a second current source circuit respectively; and a third current source circuit for adjusting the sum of currents supplied to the first and second current source circuits, wherein characteristics such as the center frequency f.sub.o and quality factor Q of the leapfrog filter are controlled by adjusting the respective current values.
摘要翻译：一种跨越滤波器，包括由运算放大器和积分电容器组成的第一和第二积分器。跨越滤波器包括差分放大器，其被布置成通过第一和第二电流源电路差分地向第一和第二积分器提供电流; 以及第三电流源电路，用于调节提供给第一和第二电流源电路的电流之和，其中通过调整各个电流值来控制跨越滤波器的中心频率fo和品质因数Q的特性。

2. 发明授权

US5828206A Serial control type voltage regulator 失效
标题翻译：串行控制型稳压器
公开(公告)号：US5828206A
公开(公告)日：1998-10-27
申请号：US616735
申请日：1996-03-15
申请人： Rinya Hosono , Takeyuki Kouti
发明人： Rinya Hosono , Takeyuki Kouti
IPC分类号： G05F1/56 , G05F1/569
CPC分类号： G05F1/569
摘要： The disclosed serial control type voltage regulator can prevent current from flowing from a backup capacitor (C1) to the side of the voltage regulator, when the control transistor (Q1) stops operating, reducing the power consumption of the backup voltage supply. In the serial control type voltage regulator having a control transistor (Q1) connected in series between an input terminal (1) and where an output terminal (2), an output voltage detector (6) and an error amplifier (4) are used for comparing an output voltage detected by the output voltage detector with a reference voltage (E3) to control the control transistor, there are provided a first switching element (Q3) for cutting off the output voltage detector (4) when the control transistor (Q1) stops operating and a second switching element (Q4) for cutting off the error amplifier (4) also when the control transistor (Q1) stops operating. When the error amplifier is constructed by field effect transistors, the second switching element can be eliminated since the input impedance of the field effect transistor is high.
摘要翻译：当控制晶体管（Q1）停止工作时，所公开的串行控制型电压调节器可以防止电流从备用电容器（C1）流向电压调节器侧，从而降低了备用电压源的功耗。在具有串联连接在输入端（1）和输出端（2）之间的控制晶体管（Q1）的串行控制型稳压器中，输出电压检测器（6）和误差放大器（4）用于将由输出电压检测器检测的输出电压与参考电压（E3）进行比较以控制控制晶体管，提供了当控制晶体管（Q1）截止时，用于切断输出电压检测器（4）的第一开关元件（Q3）还停止工作，以及第二开关元件（Q4），用于当控制晶体管（Q1）停止工作时也用于切断误差放大器（4）。当误差放大器由场效应晶体管构成时，由于场效应晶体管的输入阻抗高，所以可以消除第二开关元件。

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