ACTIVE FILTER

PROBLEM TO BE SOLVED: To provide an active filter which can reduce the variation of its output impedance and can obtain an excellent filter characteristic. SOLUTION: An active filter 10 is constituted of a CR circuit network 1 and a buffer amplifier circuit 2 connected in series between an input ter...

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Bibliographic Details
Main Authors YOSHIOKA NAOTO, TAMADA EIJI
Format Patent
LanguageEnglish
Published 27.01.1998
Edition6
Subjects
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
RESONATORS
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Summary:PROBLEM TO BE SOLVED: To provide an active filter which can reduce the variation of its output impedance and can obtain an excellent filter characteristic. SOLUTION: An active filter 10 is constituted of a CR circuit network 1 and a buffer amplifier circuit 2 connected in series between an input terminal IN and output terminal OUT and the amplifier circuit 2 is constituted of a serial circuit of a pre-stage buffer circuit 3, poststage buffer circuit 4 and resistor R0 . In addition a feedback route 5 is provided between the output side of the buffer circuit 3 and the network 1.
Bibliography:Application Number: JP19960164572