JPS5549031A - Contactless variable multivibrator - Google Patents

Contactless variable multivibrator

Info

Publication number
JPS5549031A
JPS5549031A JP12323978A JP12323978A JPS5549031A JP S5549031 A JPS5549031 A JP S5549031A JP 12323978 A JP12323978 A JP 12323978A JP 12323978 A JP12323978 A JP 12323978A JP S5549031 A JPS5549031 A JP S5549031A
Authority
JP
Japan
Prior art keywords
varactor
resistance
connection point
multivibrator
control
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
JP12323978A
Other languages
Japanese (ja)
Inventor
Tadafumi Tashiro
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 JP12323978A priority Critical patent/JPS5549031A/en
Publication of JPS5549031A publication Critical patent/JPS5549031A/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
    • H03K3/027—Generators characterised by the type of circuit or by the means used for producing pulses by the use of logic circuits, with internal or external positive feedback
    • H03K3/03—Astable circuits

Abstract

PURPOSE:To make it possible to control easily a frequency by using a varactor as a multivibrator. CONSTITUTION:Varactor C2 is connected in series to capacitors C1 and C3, and to a connection point at the cathode side of varactor C2, control power supply V is connected through resistance R3. Further, the anode-side connection point of varactor C2 is grouned by way of resistance R4. As a voltage across power supply V increases or decreases, varactor C2 decreases or increases in capacity value, allowing control of the capacity value of varactor C2. The moment a potential at connection point 1' exceeds a logical threshold level or falls by charging a group of capacitors or by discharging by way of resistance R', outputs from inverters A' and B' become zero and power voltage VDD repeatedly, thereby obtaining operation of a astable multi-vibrator. Varying power V varies the time constant of charge and discharge, so that the frequency of the multivibrator can easily be controlled.
JP12323978A 1978-10-05 1978-10-05 Contactless variable multivibrator Pending JPS5549031A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12323978A JPS5549031A (en) 1978-10-05 1978-10-05 Contactless variable multivibrator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12323978A JPS5549031A (en) 1978-10-05 1978-10-05 Contactless variable multivibrator

Publications (1)

Publication Number Publication Date
JPS5549031A true JPS5549031A (en) 1980-04-08

Family

ID=14855634

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12323978A Pending JPS5549031A (en) 1978-10-05 1978-10-05 Contactless variable multivibrator

Country Status (1)

Country Link
JP (1) JPS5549031A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59122112A (en) * 1982-12-23 1984-07-14 フエアチアイルド・カメラ・アンド・インストルメント・コ−ポレ−シヨン Temperature stabilized stop-restarting oscillator
JPS60163524A (en) * 1984-02-03 1985-08-26 Isao Kai Astable multivibrator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59122112A (en) * 1982-12-23 1984-07-14 フエアチアイルド・カメラ・アンド・インストルメント・コ−ポレ−シヨン Temperature stabilized stop-restarting oscillator
JPS60163524A (en) * 1984-02-03 1985-08-26 Isao Kai Astable multivibrator

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