JPS577624A - Rectangular wave oscillating circuit - Google Patents

Rectangular wave oscillating circuit

Info

Publication number
JPS577624A
JPS577624A JP8190580A JP8190580A JPS577624A JP S577624 A JPS577624 A JP S577624A JP 8190580 A JP8190580 A JP 8190580A JP 8190580 A JP8190580 A JP 8190580A JP S577624 A JPS577624 A JP S577624A
Authority
JP
Japan
Prior art keywords
voltage
operational amplifier
power
bias
vcc
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
JP8190580A
Other languages
Japanese (ja)
Inventor
Haruhisa Furuishi
Tetsuo Hino
Masao Yasuda
Akira Ito
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 JP8190580A priority Critical patent/JPS577624A/en
Publication of JPS577624A publication Critical patent/JPS577624A/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
    • H03K3/023—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 prevent an oscillation frequency from varying owing to variation in power voltage, by controlling the supply voltage of a bias supplying circuit connected to the input side of the positive feedback path of an operational amplifier so that it is equal to the saturation voltage of the operational amplifier. CONSTITUTION:To the negative feedback path of an operational amplifier 1, a time constant circuit consisting of a capacitor C and a resistance R4 is connected to the input side of the opsitive feedback path, a bias obtained by dividing a power voltage VCC through resistances R1 and R2 is applied while an output VO is fed back via a resistance R3. Then, a voltage control element 2 is connected between the resistances R1 and R2, and power source VCC, and consequently the power voltage is so controlled that the supply voltage of a bias supply circuit will be equal to the saturation output voltage VO of the operational amplifier 1. Namely, the power voltage VCC is lowered by a voltage DELTAV nearly equal to the difference between the saturation output voltage VO and power voltage VCC, and the voltage drop is used as the supply voltage of the bias supply circuit.
JP8190580A 1980-06-16 1980-06-16 Rectangular wave oscillating circuit Pending JPS577624A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8190580A JPS577624A (en) 1980-06-16 1980-06-16 Rectangular wave oscillating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8190580A JPS577624A (en) 1980-06-16 1980-06-16 Rectangular wave oscillating circuit

Publications (1)

Publication Number Publication Date
JPS577624A true JPS577624A (en) 1982-01-14

Family

ID=13759452

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8190580A Pending JPS577624A (en) 1980-06-16 1980-06-16 Rectangular wave oscillating circuit

Country Status (1)

Country Link
JP (1) JPS577624A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010026614A (en) * 1999-09-07 2001-04-06 김윤배 Electronic ballast

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010026614A (en) * 1999-09-07 2001-04-06 김윤배 Electronic ballast

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