JPS5597727A - Oscillation circuit - Google Patents

Oscillation circuit

Info

Publication number
JPS5597727A
JPS5597727A JP509479A JP509479A JPS5597727A JP S5597727 A JPS5597727 A JP S5597727A JP 509479 A JP509479 A JP 509479A JP 509479 A JP509479 A JP 509479A JP S5597727 A JPS5597727 A JP S5597727A
Authority
JP
Japan
Prior art keywords
circuit
current
transistor
constant
discharge
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
JP509479A
Other languages
Japanese (ja)
Other versions
JPS5944806B2 (en
Inventor
Hiroshi Kito
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP54005094A priority Critical patent/JPS5944806B2/en
Publication of JPS5597727A publication Critical patent/JPS5597727A/en
Publication of JPS5944806B2 publication Critical patent/JPS5944806B2/en
Expired 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
    • H03K3/023—Generators characterised by the type of circuit or by the means used for producing pulses by the use of differential amplifiers or comparators, with internal or external positive feedback
    • H03K3/0231—Astable circuits

Abstract

PURPOSE:To vary an oscillation frequency in proportion to the magnitude of a constant current which can be varied by providing a 3rd constant-current circuit as a discharging loop for an excessive bias current when providing a current-amplifying transistor in front of a switching circuit. CONSTITUTION:Capacitor 9 is charged by a constant current through transistor 8 and discharged through transistor 11 by a current of a value twice reference current I0. The charge and discharge of capacitor 9 are alternated by transistors 6 and 7 and its across voltage is controlled by the Schmitt circuit composed of transistors 18 and 19, and resistance 21-24. Further, feedback-circuit resistance 16 is connected from the Schmitt circuit to the charge-discharge alternation circuit so as to constitute an oscillation circuit. Furthermore, a discharge circuit for the base-emitter parasitic capacity of transistor 19 is formed of a constant-current circuit composed of transistor 12.
JP54005094A 1979-01-19 1979-01-19 oscillation circuit Expired JPS5944806B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54005094A JPS5944806B2 (en) 1979-01-19 1979-01-19 oscillation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54005094A JPS5944806B2 (en) 1979-01-19 1979-01-19 oscillation circuit

Publications (2)

Publication Number Publication Date
JPS5597727A true JPS5597727A (en) 1980-07-25
JPS5944806B2 JPS5944806B2 (en) 1984-11-01

Family

ID=11601794

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54005094A Expired JPS5944806B2 (en) 1979-01-19 1979-01-19 oscillation circuit

Country Status (1)

Country Link
JP (1) JPS5944806B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5873221A (en) * 1981-10-27 1983-05-02 Ricoh Co Ltd Oscillator
US5514987A (en) * 1994-06-27 1996-05-07 Advanced Micro Devices Inc. Digital regenerative comparator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS621928U (en) * 1985-06-19 1987-01-08

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5873221A (en) * 1981-10-27 1983-05-02 Ricoh Co Ltd Oscillator
US5514987A (en) * 1994-06-27 1996-05-07 Advanced Micro Devices Inc. Digital regenerative comparator

Also Published As

Publication number Publication date
JPS5944806B2 (en) 1984-11-01

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