JPS5631207A - Active filter oscillator - Google Patents

Active filter oscillator

Info

Publication number
JPS5631207A
JPS5631207A JP10783079A JP10783079A JPS5631207A JP S5631207 A JPS5631207 A JP S5631207A JP 10783079 A JP10783079 A JP 10783079A JP 10783079 A JP10783079 A JP 10783079A JP S5631207 A JPS5631207 A JP S5631207A
Authority
JP
Japan
Prior art keywords
active filter
time
oscillation
signal
fall
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
JP10783079A
Other languages
Japanese (ja)
Other versions
JPS6217882B2 (en
Inventor
Hiroshi Koyada
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP10783079A priority Critical patent/JPS5631207A/en
Publication of JPS5631207A publication Critical patent/JPS5631207A/en
Publication of JPS6217882B2 publication Critical patent/JPS6217882B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/20—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator

Landscapes

  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

PURPOSE:To shorten the rise time of the oscillation signal or transmission and the fall time of the oscillation signal for receiving, by constituting an active filter oscillator by an active filter, an amplitude limiting circuit, and a transistor switch. CONSTITUTION:An active filter oscillator is constituted by RC active filter 14 constituted dependently upon the state variable method, constant-current source 19, transistors (TR) 15 and 16, the amplitude limiting circuit consisting of resistances 21-24, and TR17 which operates as an analogue switch. Time t2 for switching from the oscillation mode to the reeiving mode is synchronized with the fall time of the output signal, and the collector DC voltage of TR16 applied at the oscillation time is adjusted, thereby generating the signal of a phase opposite to that of the output signal after t2. As a result, the fall of the oscillation signal is very rapid.
JP10783079A 1979-08-24 1979-08-24 Active filter oscillator Granted JPS5631207A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10783079A JPS5631207A (en) 1979-08-24 1979-08-24 Active filter oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10783079A JPS5631207A (en) 1979-08-24 1979-08-24 Active filter oscillator

Publications (2)

Publication Number Publication Date
JPS5631207A true JPS5631207A (en) 1981-03-30
JPS6217882B2 JPS6217882B2 (en) 1987-04-20

Family

ID=14469109

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10783079A Granted JPS5631207A (en) 1979-08-24 1979-08-24 Active filter oscillator

Country Status (1)

Country Link
JP (1) JPS5631207A (en)

Also Published As

Publication number Publication date
JPS6217882B2 (en) 1987-04-20

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