JPS57127323A - Switched capacitor filter - Google Patents

Switched capacitor filter

Info

Publication number
JPS57127323A
JPS57127323A JP1275081A JP1275081A JPS57127323A JP S57127323 A JPS57127323 A JP S57127323A JP 1275081 A JP1275081 A JP 1275081A JP 1275081 A JP1275081 A JP 1275081A JP S57127323 A JPS57127323 A JP S57127323A
Authority
JP
Japan
Prior art keywords
beta1
switched capacitor
beta2
constant
integral
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.)
Pending
Application number
JP1275081A
Other languages
Japanese (ja)
Inventor
Yasuhiko Fujita
Kenro Sakagami
Tetsuya Iida
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP1275081A priority Critical patent/JPS57127323A/en
Publication of JPS57127323A publication Critical patent/JPS57127323A/en
Pending 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Filters That Use Time-Delay Elements (AREA)

Abstract

PURPOSE:To increase the filter characteristics and to improve the space coefficient, by setting nearly the same integral constant for integrators of higher- order switched capacitor filters. CONSTITUTION:The integral constant of switched capacitor filters 11 and 12 are set at beta1 and beta2 respectively (K0 and S showing the gain of an operational amplifier and the S function respectively in the diagram). Then a constant K1 is selected to satisfy beta1/K1=K1beta2. Thus beta1'=beta2'=W0 is satisfied for new integral constants beta1'=beta1/K1 and beta2'=K2beta2. Accordingly the area can be reduced for the capacity occupying on an integrated circuit pattern with an improved space coefficient by providing switched capacitor filters 11' and 12' having equal integral constants beta1' and beta2'.
JP1275081A 1981-01-30 1981-01-30 Switched capacitor filter Pending JPS57127323A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1275081A JPS57127323A (en) 1981-01-30 1981-01-30 Switched capacitor filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1275081A JPS57127323A (en) 1981-01-30 1981-01-30 Switched capacitor filter

Publications (1)

Publication Number Publication Date
JPS57127323A true JPS57127323A (en) 1982-08-07

Family

ID=11814088

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1275081A Pending JPS57127323A (en) 1981-01-30 1981-01-30 Switched capacitor filter

Country Status (1)

Country Link
JP (1) JPS57127323A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02121514A (en) * 1988-10-31 1990-05-09 Nec Corp Switched capacitor circuit
JPH05275974A (en) * 1992-03-30 1993-10-22 Japan Radio Co Ltd Switched capacitor filter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02121514A (en) * 1988-10-31 1990-05-09 Nec Corp Switched capacitor circuit
JPH05275974A (en) * 1992-03-30 1993-10-22 Japan Radio Co Ltd Switched capacitor filter

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