JPS5468622A - Voltage control oscillator of inverse logarithmic characteristics - Google Patents

Voltage control oscillator of inverse logarithmic characteristics

Info

Publication number
JPS5468622A
JPS5468622A JP13591977A JP13591977A JPS5468622A JP S5468622 A JPS5468622 A JP S5468622A JP 13591977 A JP13591977 A JP 13591977A JP 13591977 A JP13591977 A JP 13591977A JP S5468622 A JPS5468622 A JP S5468622A
Authority
JP
Japan
Prior art keywords
voltage
capacitor
resistance
inverse logarithmic
vth
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
JP13591977A
Other languages
Japanese (ja)
Other versions
JPS606577B2 (en
Inventor
Masaru Uya
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 JP52135919A priority Critical patent/JPS606577B2/en
Publication of JPS5468622A publication Critical patent/JPS5468622A/en
Publication of JPS606577B2 publication Critical patent/JPS606577B2/en
Expired legal-status Critical Current

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Abstract

PURPOSE: To improve the inverse logarithmic linearity, by taking the value of resistance for linearity correction connected in series to the capacitor for time constant of voltage or current control oscillator of linear characteristics larger than the optimum value.
CONSTITUTION: A control current Ic of a current control oscillator 2 flows from a constant voltage power source Vs through a capacitor for time constant 23 and a resistance for linearity correction 24. As the voltage across the capacitor 23 increases, when the voltage at point A becomes less than the threshold voltage VTH, the output of a voltage comparator 20 becomes high potential, and a monostable multivibrator 21 generates a pulse voltage of tw in width, thereby discharging the capacitor 23 completely. Therefore, the oscillator 2 oscillates with dummy sawtooth waveforms, and, supposing T' to be the time required for the voltage at point A to lower from Vs-Rc,Ic to VTH, the oscillation frequency fo will be fo1/(TwT')= Ic/{C(Vs-VTH)+Ic(tw-CR)}. Hence, when the resistance value Rc of the resistance 24 is Rc>tw/C, the inverse logarithmic line elevates as the current Ic increases, so that the inverse logarithmic linearity may be improved.
COPYRIGHT: (C)1979,JPO&Japio
JP52135919A 1977-11-11 1977-11-11 Anti-logarithmic characteristic voltage controlled oscillator Expired JPS606577B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52135919A JPS606577B2 (en) 1977-11-11 1977-11-11 Anti-logarithmic characteristic voltage controlled oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52135919A JPS606577B2 (en) 1977-11-11 1977-11-11 Anti-logarithmic characteristic voltage controlled oscillator

Publications (2)

Publication Number Publication Date
JPS5468622A true JPS5468622A (en) 1979-06-01
JPS606577B2 JPS606577B2 (en) 1985-02-19

Family

ID=15162906

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52135919A Expired JPS606577B2 (en) 1977-11-11 1977-11-11 Anti-logarithmic characteristic voltage controlled oscillator

Country Status (1)

Country Link
JP (1) JPS606577B2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4737793U (en) * 1971-05-19 1972-12-26
JPS5013666U (en) * 1973-05-31 1975-02-13

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4737793U (en) * 1971-05-19 1972-12-26
JPS5013666U (en) * 1973-05-31 1975-02-13

Also Published As

Publication number Publication date
JPS606577B2 (en) 1985-02-19

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