JPS54120567A - Pulse generating circuit - Google Patents

Pulse generating circuit

Info

Publication number
JPS54120567A
JPS54120567A JP2722078A JP2722078A JPS54120567A JP S54120567 A JPS54120567 A JP S54120567A JP 2722078 A JP2722078 A JP 2722078A JP 2722078 A JP2722078 A JP 2722078A JP S54120567 A JPS54120567 A JP S54120567A
Authority
JP
Japan
Prior art keywords
circuit
voltage supply
output
constant
comparator
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
JP2722078A
Other languages
Japanese (ja)
Other versions
JPS5945289B2 (en
Inventor
Yasuo Taguchi
Hideharu Tezuka
Yuichiro Furukawa
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 JP53027220A priority Critical patent/JPS5945289B2/en
Publication of JPS54120567A publication Critical patent/JPS54120567A/en
Publication of JPS5945289B2 publication Critical patent/JPS5945289B2/en
Expired legal-status Critical Current

Links

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  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

PURPOSE:To make it possible to vary an oscillation frequency and a duty ratio freely corresponding to an input signal, by providing a charge-discharge circuit composed of a capacitor discharged by a current whose value varies corresponding to the input signal. CONSTITUTION:The pulse generating circuit consists of input circuit 1, charge- discharge circuit 2 composed of a constant-voltage supply, variable current supplies whose current values vary according to the output of circuit 1, and a capacitor charged or discharged by output currents of two current supplies, reference voltage generating circuit 3 composed of a constant-voltage supply with its value fixed and a variable voltage supply whose value varies according to the output signal of circuit 1, comparator 4, buffer circuit 5, and change-over circuit 6 (the output voltage of the constant voltage supply is supplied to comparator 4 through the changeover of circuit 3 so that when the output signal of comparator 4 is ''1'', the capacity of circuit 2 is charged by the constant voltage supply). Its frequency characteristics, shown by solid lines (a) to (d) and its duty-ratio characteristics, shown by one-dot chain lines, can be varied freely according to the input signal.
JP53027220A 1978-03-10 1978-03-10 Pulse generation circuit Expired JPS5945289B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53027220A JPS5945289B2 (en) 1978-03-10 1978-03-10 Pulse generation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53027220A JPS5945289B2 (en) 1978-03-10 1978-03-10 Pulse generation circuit

Publications (2)

Publication Number Publication Date
JPS54120567A true JPS54120567A (en) 1979-09-19
JPS5945289B2 JPS5945289B2 (en) 1984-11-05

Family

ID=12215008

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53027220A Expired JPS5945289B2 (en) 1978-03-10 1978-03-10 Pulse generation circuit

Country Status (1)

Country Link
JP (1) JPS5945289B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63191404A (en) * 1987-02-03 1988-08-08 Fujitsu Ltd Clock generator
JPH02224517A (en) * 1989-02-27 1990-09-06 Yokogawa Electric Corp Astable ocsillating circuit and switching power supply

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63191404A (en) * 1987-02-03 1988-08-08 Fujitsu Ltd Clock generator
JPH02224517A (en) * 1989-02-27 1990-09-06 Yokogawa Electric Corp Astable ocsillating circuit and switching power supply

Also Published As

Publication number Publication date
JPS5945289B2 (en) 1984-11-05

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