JPS56136019A - Switched capacitor circuit - Google Patents

Switched capacitor circuit

Info

Publication number
JPS56136019A
JPS56136019A JP3892280A JP3892280A JPS56136019A JP S56136019 A JPS56136019 A JP S56136019A JP 3892280 A JP3892280 A JP 3892280A JP 3892280 A JP3892280 A JP 3892280A JP S56136019 A JPS56136019 A JP S56136019A
Authority
JP
Japan
Prior art keywords
capacitor
switched capacitor
capacitor circuit
parallel
width
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
JP3892280A
Other languages
Japanese (ja)
Other versions
JPS631773B2 (en
Inventor
Kazuo Yamakido
Jiro Sakaguchi
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP3892280A priority Critical patent/JPS56136019A/en
Publication of JPS56136019A publication Critical patent/JPS56136019A/en
Publication of JPS631773B2 publication Critical patent/JPS631773B2/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

Landscapes

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

Abstract

PURPOSE:To control freely the equivalent capacity value of a capacitor formed to a size suitable to LSI-implementation, by providing a width capacitor in addition to an integrating capacitor. CONSTITUTION:The switching periods of switches SW1 and SW2 are denoted as T, and while width capacitor C0 is connected in parallel to capacitor C1 via switch SW3, switch SW4 grounded at one terminal is provided in parallel to C0. When SW3 and SW4 are switched (n) times in time T, V(n)=(C1/C1+C0)<n>V1 and time constant tau is equal to C2/C1(C1/C1+C0)<n>T. When T=125mus, tau=1sec, and n=3, C2/C1=9.46 and when C0/C1=8.46 and C1=0.5PF, C2=4.72PF and C0=4.23PF.
JP3892280A 1980-03-28 1980-03-28 Switched capacitor circuit Granted JPS56136019A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3892280A JPS56136019A (en) 1980-03-28 1980-03-28 Switched capacitor circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3892280A JPS56136019A (en) 1980-03-28 1980-03-28 Switched capacitor circuit

Publications (2)

Publication Number Publication Date
JPS56136019A true JPS56136019A (en) 1981-10-23
JPS631773B2 JPS631773B2 (en) 1988-01-14

Family

ID=12538708

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3892280A Granted JPS56136019A (en) 1980-03-28 1980-03-28 Switched capacitor circuit

Country Status (1)

Country Link
JP (1) JPS56136019A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5883423A (en) * 1981-02-21 1983-05-19 Shinsaku Mori Switched capacitor circuit
JPH02213215A (en) * 1989-02-13 1990-08-24 Mitsubishi Electric Corp Switched capacitor circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5883423A (en) * 1981-02-21 1983-05-19 Shinsaku Mori Switched capacitor circuit
JPH0225290B2 (en) * 1981-02-21 1990-06-01 Shinsaku Mori
JPH02213215A (en) * 1989-02-13 1990-08-24 Mitsubishi Electric Corp Switched capacitor circuit

Also Published As

Publication number Publication date
JPS631773B2 (en) 1988-01-14

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