JPS525246A - Frequency variable oscillation circuit - Google Patents

Frequency variable oscillation circuit

Info

Publication number
JPS525246A
JPS525246A JP8214175A JP8214175A JPS525246A JP S525246 A JPS525246 A JP S525246A JP 8214175 A JP8214175 A JP 8214175A JP 8214175 A JP8214175 A JP 8214175A JP S525246 A JPS525246 A JP S525246A
Authority
JP
Japan
Prior art keywords
oscillation circuit
frequency variable
variable oscillation
switch
time constant
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
JP8214175A
Other languages
Japanese (ja)
Inventor
Masami Watanabe
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 JP8214175A priority Critical patent/JPS525246A/en
Publication of JPS525246A publication Critical patent/JPS525246A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
    • H03K3/28—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback
    • H03K3/281—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator
    • H03K3/282—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator astable
    • H03K3/2823—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator astable using two active transistor of the same conductivity type

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Oscillators With Electromechanical Resonators (AREA)

Abstract

PURPOSE:To install more than one pair of time constant circuit corresponding to desired frequency, to perform frequency switch by switching time constant circuit by diode switch, and thus to eliminate frequency fluctuation caused by floating capacity, etc. even if switch controlling is carried out by external operation board.
JP8214175A 1975-07-02 1975-07-02 Frequency variable oscillation circuit Pending JPS525246A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8214175A JPS525246A (en) 1975-07-02 1975-07-02 Frequency variable oscillation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8214175A JPS525246A (en) 1975-07-02 1975-07-02 Frequency variable oscillation circuit

Publications (1)

Publication Number Publication Date
JPS525246A true JPS525246A (en) 1977-01-14

Family

ID=13766142

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8214175A Pending JPS525246A (en) 1975-07-02 1975-07-02 Frequency variable oscillation circuit

Country Status (1)

Country Link
JP (1) JPS525246A (en)

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