JPS55149516A - Low pass filter - Google Patents

Low pass filter

Info

Publication number
JPS55149516A
JPS55149516A JP5737379A JP5737379A JPS55149516A JP S55149516 A JPS55149516 A JP S55149516A JP 5737379 A JP5737379 A JP 5737379A JP 5737379 A JP5737379 A JP 5737379A JP S55149516 A JPS55149516 A JP S55149516A
Authority
JP
Japan
Prior art keywords
fet82
resistor
filter
low pass
pass filter
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
JP5737379A
Other languages
Japanese (ja)
Other versions
JPH0247129B2 (en
Inventor
Shigetoshi Noda
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP5737379A priority Critical patent/JPS55149516A/en
Publication of JPS55149516A publication Critical patent/JPS55149516A/en
Publication of JPH0247129B2 publication Critical patent/JPH0247129B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/04—Frequency selective two-port networks
    • H03H11/12—Frequency selective two-port networks using amplifiers with feedback
    • H03H11/1213—Frequency selective two-port networks using amplifiers with feedback using transistor amplifiers

Landscapes

  • Filters And Equalizers (AREA)
  • Networks Using Active Elements (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Feedback Control In General (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

PURPOSE:To shorten the time up to the servo operation at start, by constituting the low pass filter through the use of the lag-lead type filter having the same transfer function as the active filter at servo lock and the buffer of high impedance. CONSTITUTION:The output terminal of the charge-pump 6 is connected to the control terminal of FET82 via the resistor 81. The output terminal of FET82 is grounded via the resistor 83 and connected to the input terminal of the amplifier 8 via the ripple filter 84. Further, the control terminal of FET82 is grounded via the series circuit of the capacitor 85 and the resistor 86. In this circuit, the lag-lead type filter is constituted with the resistors 81, 86 and the capacitor 85, and the buffer amplifier of high input impedance is constituted with FET82 and the resistor 83.
JP5737379A 1979-05-10 1979-05-10 Low pass filter Granted JPS55149516A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5737379A JPS55149516A (en) 1979-05-10 1979-05-10 Low pass filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5737379A JPS55149516A (en) 1979-05-10 1979-05-10 Low pass filter

Publications (2)

Publication Number Publication Date
JPS55149516A true JPS55149516A (en) 1980-11-20
JPH0247129B2 JPH0247129B2 (en) 1990-10-18

Family

ID=13053783

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5737379A Granted JPS55149516A (en) 1979-05-10 1979-05-10 Low pass filter

Country Status (1)

Country Link
JP (1) JPS55149516A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04127389A (en) * 1990-09-19 1992-04-28 Fujitsu Ltd Pi arithmetic circuit of motor driving circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5280808A (en) * 1975-12-27 1977-07-06 Matsushita Electric Ind Co Ltd Filter circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5280808A (en) * 1975-12-27 1977-07-06 Matsushita Electric Ind Co Ltd Filter circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04127389A (en) * 1990-09-19 1992-04-28 Fujitsu Ltd Pi arithmetic circuit of motor driving circuit

Also Published As

Publication number Publication date
JPH0247129B2 (en) 1990-10-18

Similar Documents

Publication Publication Date Title
JPS55166324A (en) Switched capacitor filter
JPS55158725A (en) Switched capacitor filter
AU567972B2 (en) Complex capacitive impedance
JPS55149516A (en) Low pass filter
JPS5560320A (en) Active filter
JPS5717030A (en) Power supply circuit
JPS558656A (en) Sample hold circuit
JPS5673911A (en) Microwave amplifier
JPS5443662A (en) Transistor amplifier
JPS5753129A (en) Active filter
SU675586A1 (en) Gyrator
JPS54118149A (en) Comparator circuit
FR2331912A1 (en) Active bandpass filter of second order - with independently controlled parameters for modulated telephone signals
JPS5395553A (en) Capacitance circuit
JPS5772415A (en) Circuir having function of band pass filter and oscillator
JPS5586215A (en) Doubling circuit
JPS57127323A (en) Switched capacitor filter
JPS5715508A (en) Monolithic integrated circuit
JPS57212810A (en) Amplifying circuit
KLINE Capacitance multiplier and filter synthesizing network[Patent]
JPS5631214A (en) Active filter
JPS55153123A (en) Variable equalizing circuit
JPS5724106A (en) Quartz oscillation circuit
IL45236A (en) Failsafe amplifier circuit
TH3704EX (en) Impedance, type of complex capacitors