JPS56158526A - Parallel tuning circuit for switched capacitor - Google Patents

Parallel tuning circuit for switched capacitor

Info

Publication number
JPS56158526A
JPS56158526A JP6138880A JP6138880A JPS56158526A JP S56158526 A JPS56158526 A JP S56158526A JP 6138880 A JP6138880 A JP 6138880A JP 6138880 A JP6138880 A JP 6138880A JP S56158526 A JPS56158526 A JP S56158526A
Authority
JP
Japan
Prior art keywords
swc
circuit
capacitor
constitution
inductance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP6138880A
Other languages
Japanese (ja)
Other versions
JPS6336581B2 (en
Inventor
Mitsuo Tsunoishi
Seiji Kato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP6138880A priority Critical patent/JPS56158526A/en
Publication of JPS56158526A publication Critical patent/JPS56158526A/en
Publication of JPS6336581B2 publication Critical patent/JPS6336581B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H19/00—Networks using time-varying elements, e.g. N-path filters
    • H03H19/004—Switched capacitor networks

Abstract

PURPOSE:To constitute the parallel tuning circuit of LC constitution filter by an SWC circuit, by making the integration coefficient less than a prescribed value, in an inductance circuit consisting of a switched capacitor SWC integrator and a delay circuit. CONSTITUTION:An SWC integrator consists of an operational amplifier having an SWC capacitor C0 at the input and an integration capacitor Ca at the feedback circuit, and to said integrator an one sample time delay circuit consisting of an SWCC1 is in cascade connection to form the inductance circuit of SWC constitution by feeding back a signal to input terminals A,A' from the output terminal of the SWC integrator and the delay circuit via the SWC circuit. The L1 of a parallel resonant circuit consisting of the inductance L1 and a capacitor Cbeta is replaced with the inductance L1 of the SWC constitution, and the resonant circuit N including the capacitor Cbeta in the SWC is obtained by selecting the values of C0,Ca so that the integration coefficient C0/Ca is >=4. The SWC filter with broad dynamic range can be obtained by constituting the filter with this circuit N.
JP6138880A 1980-05-09 1980-05-09 Parallel tuning circuit for switched capacitor Granted JPS56158526A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6138880A JPS56158526A (en) 1980-05-09 1980-05-09 Parallel tuning circuit for switched capacitor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6138880A JPS56158526A (en) 1980-05-09 1980-05-09 Parallel tuning circuit for switched capacitor

Publications (2)

Publication Number Publication Date
JPS56158526A true JPS56158526A (en) 1981-12-07
JPS6336581B2 JPS6336581B2 (en) 1988-07-20

Family

ID=13169729

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6138880A Granted JPS56158526A (en) 1980-05-09 1980-05-09 Parallel tuning circuit for switched capacitor

Country Status (1)

Country Link
JP (1) JPS56158526A (en)

Also Published As

Publication number Publication date
JPS6336581B2 (en) 1988-07-20

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