JPS5547730A - Saw tooth wave generation circuit - Google Patents

Saw tooth wave generation circuit

Info

Publication number
JPS5547730A
JPS5547730A JP12171678A JP12171678A JPS5547730A JP S5547730 A JPS5547730 A JP S5547730A JP 12171678 A JP12171678 A JP 12171678A JP 12171678 A JP12171678 A JP 12171678A JP S5547730 A JPS5547730 A JP S5547730A
Authority
JP
Japan
Prior art keywords
constant current
capacitor
given
circuit
saw tooth
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
JP12171678A
Other languages
Japanese (ja)
Inventor
Hisashi Katafuchi
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 JP12171678A priority Critical patent/JPS5547730A/en
Publication of JPS5547730A publication Critical patent/JPS5547730A/en
Pending legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Control Of Charge By Means Of Generators (AREA)

Abstract

PURPOSE:To keep the amplitude constant even if the period of saw tooth wave is changed, by setting the value of constant current of each constant current circuit charging and discharging capacitors interlockingly. CONSTITUTION:The charge discharge capacitor C is provided at the input terminal of the comparator COM and the first comprison reference voltage circuit 21 and the output of the second comparison reference voltage circuit 23 is given to the reference input terminal. While the constant current transistor Q1 is at cut-off operation, the ouput of high voltage level VH is given to the comparator COM as the first reference voltage and the capacitor C is charged up until it exceeds VH. When Q4 is OFF and at constant current operation, the comparator COM is at low voltage VL and the capacitor C is discharged until the voltage reaches VL. The charge of capacitor C is made by the output of the first constant current circuit 25 given to the charger 25 and discharge is made via the second constant current circuit 27.
JP12171678A 1978-10-03 1978-10-03 Saw tooth wave generation circuit Pending JPS5547730A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12171678A JPS5547730A (en) 1978-10-03 1978-10-03 Saw tooth wave generation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12171678A JPS5547730A (en) 1978-10-03 1978-10-03 Saw tooth wave generation circuit

Publications (1)

Publication Number Publication Date
JPS5547730A true JPS5547730A (en) 1980-04-04

Family

ID=14818102

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12171678A Pending JPS5547730A (en) 1978-10-03 1978-10-03 Saw tooth wave generation circuit

Country Status (1)

Country Link
JP (1) JPS5547730A (en)

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