JPS54108558A - Astable moltivibrator circuit - Google Patents

Astable moltivibrator circuit

Info

Publication number
JPS54108558A
JPS54108558A JP1523978A JP1523978A JPS54108558A JP S54108558 A JPS54108558 A JP S54108558A JP 1523978 A JP1523978 A JP 1523978A JP 1523978 A JP1523978 A JP 1523978A JP S54108558 A JPS54108558 A JP S54108558A
Authority
JP
Japan
Prior art keywords
circuit
repetitive
threshold voltage
voltage
fet11
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
JP1523978A
Other languages
Japanese (ja)
Inventor
Yasoji Suzuki
Tetsuya Iida
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP1523978A priority Critical patent/JPS54108558A/en
Publication of JPS54108558A publication Critical patent/JPS54108558A/en
Priority to US06/129,737 priority patent/US4301427A/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
    • H03K3/353—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of field-effect transistors with internal or external positive feedback
    • H03K3/354—Astable circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
    • H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
    • H03K4/48—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices
    • H03K4/50—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth voltage is produced across a capacitor
    • H03K4/501—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth voltage is produced across a capacitor the starting point of the flyback period being determined by the amplitude of the voltage across the capacitor, e.g. by a comparator

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manipulation Of Pulses (AREA)

Abstract

PURPOSE:To make it possible to prescribe the repetitive frequency of a repetitive signal with high precision, and also to obtain both steep rise and fall of a signal waveform, by composing a Schmitt trigger circuit of MOS elements entirely. CONSTITUTION:The astable multivibrator circuit consists of input circuit 21 and Schmitt trigger circuit 20, which is composed of MOS inverters 14 and 15, p-channel MOSFETs 16 and 17, and n-channel MOSFETs 18 and 19. When voltage Va rises gradually up to higher threshold voltage VthH of circuit 20, voltage Vc is at level ''1'' and FET11 is cut off. Then, when Va decreases at the time constant of resistance 12 and capacitor 13 down to lower threshold voltage VthL of circuit 20, Vc is inverted into ''0'' and FET11 turns off, so that repetitive signal Vout with a constant period and constant pulse width can be obtained through the repetitive operation. At this time, since the threshold voltage is determined only inside of circuit 20, the repetitive frequency can be prescribed with high precision and no back-gate bias is applied, so that the waveform will becomes steep.
JP1523978A 1977-07-30 1978-02-13 Astable moltivibrator circuit Pending JPS54108558A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP1523978A JPS54108558A (en) 1978-02-13 1978-02-13 Astable moltivibrator circuit
US06/129,737 US4301427A (en) 1977-07-30 1980-03-12 Astable MOS FET multivibrator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1523978A JPS54108558A (en) 1978-02-13 1978-02-13 Astable moltivibrator circuit

Publications (1)

Publication Number Publication Date
JPS54108558A true JPS54108558A (en) 1979-08-25

Family

ID=11883304

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1523978A Pending JPS54108558A (en) 1977-07-30 1978-02-13 Astable moltivibrator circuit

Country Status (1)

Country Link
JP (1) JPS54108558A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5531890A (en) * 1978-08-28 1980-03-06 Ppg Industries Inc Resin binder

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3904888A (en) * 1974-05-17 1975-09-09 Rca Corp Circuits exhibiting hysteresis using transistors of complementary conductivity type

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3904888A (en) * 1974-05-17 1975-09-09 Rca Corp Circuits exhibiting hysteresis using transistors of complementary conductivity type

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5531890A (en) * 1978-08-28 1980-03-06 Ppg Industries Inc Resin binder
JPS625950B2 (en) * 1978-08-28 1987-02-07 Ppg Industries Inc

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