JPS5488760A - Oscillation circuit - Google Patents

Oscillation circuit

Info

Publication number
JPS5488760A
JPS5488760A JP15189477A JP15189477A JPS5488760A JP S5488760 A JPS5488760 A JP S5488760A JP 15189477 A JP15189477 A JP 15189477A JP 15189477 A JP15189477 A JP 15189477A JP S5488760 A JPS5488760 A JP S5488760A
Authority
JP
Japan
Prior art keywords
voltage
potential
output
temperature variation
ref
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
JP15189477A
Other languages
Japanese (ja)
Other versions
JPS5525544B2 (en
Inventor
Masami Onishi
Ichiro Ikegami
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 JP15189477A priority Critical patent/JPS5488760A/en
Publication of JPS5488760A publication Critical patent/JPS5488760A/en
Publication of JPS5525544B2 publication Critical patent/JPS5525544B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To reduce the frequency variation due to temperature, by cancelling the temperature variation of transistor with the temperature variation of opposite polarity transistor.
CONSTITUTION: At the mement when the power supply Vcc is applied, the potential V2 of the time constant circuit consisting of the capacitor 13 and the resistor 14 is zero, and the potential V1 at the junction of the resistors 6, 7 is the voltage division VL of the voltage Vref of the reference voltage 16. Since V1>V2, the output of the voltage comparator 2 is "1", turning on the analog switch 4. Thus, transistors TR9 to 11 are turned on, and when V2 is higher than the synthesis voltage VH between the emitter potential of TR9 and the reference voltage Vref, the output of the voltage comparator 2 is "0", and switch 4 and TR9 to 11 are opened resulting in V1=VL. On the other hand, when V2<VL, again the state is charging state. Charging and discharge is repeated within the range of VH and VL and the oscillation output is picked up from the terminal 17. In this case, the temperature variation of the emitter potential of TR9 to 11 can be cancelled with TR5 of opposite polarity.
COPYRIGHT: (C)1979,JPO&Japio
JP15189477A 1977-12-16 1977-12-16 Oscillation circuit Granted JPS5488760A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15189477A JPS5488760A (en) 1977-12-16 1977-12-16 Oscillation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15189477A JPS5488760A (en) 1977-12-16 1977-12-16 Oscillation circuit

Publications (2)

Publication Number Publication Date
JPS5488760A true JPS5488760A (en) 1979-07-14
JPS5525544B2 JPS5525544B2 (en) 1980-07-07

Family

ID=15528513

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15189477A Granted JPS5488760A (en) 1977-12-16 1977-12-16 Oscillation circuit

Country Status (1)

Country Link
JP (1) JPS5488760A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4823683A (en) * 1988-02-09 1989-04-25 Packaging Corporation Of America Popcorn popper

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4823683A (en) * 1988-02-09 1989-04-25 Packaging Corporation Of America Popcorn popper

Also Published As

Publication number Publication date
JPS5525544B2 (en) 1980-07-07

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