RU2007100796A

RU2007100796A - ACTIVE FOUR FOUR FOUR ORDER WITH ZERO TRANSMISSION

Info

Publication number: RU2007100796A
Application number: RU2007100796/09A
Authority: RU
Inventors: Вадим Юрьевич Горовой (RU); Вадим Юрьевич Горовой; Александр Николаевич Дружинин (RU); Александр Николаевич Дружинин; Борис Филиппович Змий (RU); Борис Филиппович Змий
Priority date: 2007-01-09
Filing date: 2007-01-09
Publication date: 2008-07-20
Also published as: RU2341891C2

Abstract

Активный фильтр нижних частот четвертого порядка с нулем передачи, содержащий последовательно подключенные входной зажим фильтра, первый, второй, третий, четвертый резисторы, первый, второй усилители, выход последнего является выходом фильтра, вторые выводы первого, второго, третьего, четвертого резисторов соединены с первыми выводами, соответственно, первого, второго, третьего, четвертого конденсаторов, вторые выводы первого и третьего конденсаторов соединены с выходом первого усилителя, вторые выводы четвертого - через пятый резистор с выходом первого усилителя и через пятый конденсатор с выходом фильтра, который через шестой резистор соединен с общей точкой первого, второго резисторов и первого конденсатора, а через шестой конденсатор - с общей точкой второго, третьего резисторов и второго конденсатора, отличающийся тем, что второй вывод второго конденсатора соединен с общей точкой включения четвертого, пятого конденсаторов и пятого резистора.An active fourth-order low-pass filter with zero transmission, containing a filter input terminal connected in series, first, second, third, fourth resistors, first, second amplifiers, the output of the latter is a filter output, second outputs of the first, second, third, fourth resistors are connected to the first the conclusions of the first, second, third, fourth capacitors, respectively, the second conclusions of the first and third capacitors are connected to the output of the first amplifier, the second conclusions of the fourth through the fifth resistor with the output of the first amplifier and through the fifth capacitor with the output of the filter, which is connected through the sixth resistor to the common point of the first, second resistors and the first capacitor, and through the sixth capacitor to the common point of the second, third resistors and the second capacitor, characterized in that the second output the second capacitor is connected to a common switching point of the fourth, fifth capacitors and the fifth resistor.

Claims

An active fourth-order low-pass filter with zero transmission, containing a filter input terminal connected in series, first, second, third, fourth resistors, first, second amplifiers, the output of the latter is a filter output, second outputs of the first, second, third, fourth resistors are connected to the first the conclusions of the first, second, third, fourth capacitors, respectively, the second conclusions of the first and third capacitors are connected to the output of the first amplifier, the second conclusions of the fourth through the fifth resistor with the output of the first amplifier and through the fifth capacitor with the output of the filter, which is connected through the sixth resistor to the common point of the first, second resistors and the first capacitor, and through the sixth capacitor to the common point of the second, third resistors and the second capacitor, characterized in that the second output the second capacitor is connected to a common switching point of the fourth, fifth capacitors and the fifth resistor.