JPS57212820A - Cr oscillating circuit - Google Patents

Cr oscillating circuit

Info

Publication number
JPS57212820A
JPS57212820A JP56098562A JP9856281A JPS57212820A JP S57212820 A JPS57212820 A JP S57212820A JP 56098562 A JP56098562 A JP 56098562A JP 9856281 A JP9856281 A JP 9856281A JP S57212820 A JPS57212820 A JP S57212820A
Authority
JP
Japan
Prior art keywords
time constant
voltage
fluctuation
power supply
supply voltage
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
JP56098562A
Other languages
Japanese (ja)
Inventor
Kensaku Wada
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP56098562A priority Critical patent/JPS57212820A/en
Publication of JPS57212820A publication Critical patent/JPS57212820A/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

Abstract

PURPOSE:To improve the stability of an oscillating frequency against the fluctuation of power supply voltage, by decreasing and increasing a resistive component of a time constant circuit in response to the increase/decrease of the voltage representing the fluctuation of the power supply voltage. CONSTITUTION:In a CR time constant circuit 12, a voltage dependent variable resistive element 14 is connected between the gate of transistors (TRs)Q1 and Q2 and a connecting point B, and a capacitor 15 is connected between a connecting point of the gate of the Trs Q1 and Q2 and the element 14, and a reference voltage, e.g., ground potential. Even if threshold voltage is increased at the increase in the power supply voltage, the charging time constant is decreased but a discharge time constant becomes constant. Thus, the fluctuation of the oscillated frequency can be suppressed and the oscillating frequency is made stable.
JP56098562A 1981-06-25 1981-06-25 Cr oscillating circuit Pending JPS57212820A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56098562A JPS57212820A (en) 1981-06-25 1981-06-25 Cr oscillating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56098562A JPS57212820A (en) 1981-06-25 1981-06-25 Cr oscillating circuit

Publications (1)

Publication Number Publication Date
JPS57212820A true JPS57212820A (en) 1982-12-27

Family

ID=14223112

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56098562A Pending JPS57212820A (en) 1981-06-25 1981-06-25 Cr oscillating circuit

Country Status (1)

Country Link
JP (1) JPS57212820A (en)

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