JPS5483355A - Frequency modulation oscillator - Google Patents

Frequency modulation oscillator

Info

Publication number
JPS5483355A
JPS5483355A JP15049677A JP15049677A JPS5483355A JP S5483355 A JPS5483355 A JP S5483355A JP 15049677 A JP15049677 A JP 15049677A JP 15049677 A JP15049677 A JP 15049677A JP S5483355 A JPS5483355 A JP S5483355A
Authority
JP
Japan
Prior art keywords
diodes
operation amplifier
reference voltage
poles
modulated
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
JP15049677A
Other languages
Japanese (ja)
Inventor
Ryuichi Fujita
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP15049677A priority Critical patent/JPS5483355A/en
Publication of JPS5483355A publication Critical patent/JPS5483355A/en
Pending legal-status Critical Current

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  • Amplitude Modulation (AREA)

Abstract

PURPOSE: To connect two diodes, which have been made mutually reverse in poles, to the reference voltage generator circuit which is to cause shifting to a free running multivibrator using an operation amplifier and to impress a pair of modulated signals having mutually reverse characteristics to the other ends of the two diodes, thereby making it possible to change oscillating frequency by changing the reference voltage.
CONSTITUTION: An ordinary free running multivibrator is composed of resistors 1 to 7, capacitor 8, operation amplifier 9 and two zener diodes 10 and 11 which are serially connected in opposite directions. This ordinary circuit is additionally provided with resistors 14 to 19, 23 and 24, operation amplifier 29 having an input terminal for modulated voltage, operation amplifier 30 which is located, through a resistor, at the later stage of the operation amplifier 29, and diodes 32 and 33 which are connected, in mutually reversed poles, to the reference voltage generator circuit. In this constitution, modulated voltages 37 and 38 in mutually reversed poles which are outputs of amplifiers 29 and 30 are impressed on the other ends of diodes 32 and 33 to change the reference voltage.
COPYRIGHT: (C)1979,JPO&Japio
JP15049677A 1977-12-16 1977-12-16 Frequency modulation oscillator Pending JPS5483355A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15049677A JPS5483355A (en) 1977-12-16 1977-12-16 Frequency modulation oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15049677A JPS5483355A (en) 1977-12-16 1977-12-16 Frequency modulation oscillator

Publications (1)

Publication Number Publication Date
JPS5483355A true JPS5483355A (en) 1979-07-03

Family

ID=15498127

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15049677A Pending JPS5483355A (en) 1977-12-16 1977-12-16 Frequency modulation oscillator

Country Status (1)

Country Link
JP (1) JPS5483355A (en)

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