JPS5679961A - Frequency-to-voltage converting circuit - Google Patents

Frequency-to-voltage converting circuit

Info

Publication number
JPS5679961A
JPS5679961A JP15709679A JP15709679A JPS5679961A JP S5679961 A JPS5679961 A JP S5679961A JP 15709679 A JP15709679 A JP 15709679A JP 15709679 A JP15709679 A JP 15709679A JP S5679961 A JPS5679961 A JP S5679961A
Authority
JP
Japan
Prior art keywords
resistance
frequency
capacity value
goes
change
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
JP15709679A
Other languages
Japanese (ja)
Other versions
JPS6325363B2 (en
Inventor
Shigetoshi Noda
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP15709679A priority Critical patent/JPS5679961A/en
Publication of JPS5679961A publication Critical patent/JPS5679961A/en
Publication of JPS6325363B2 publication Critical patent/JPS6325363B2/ja
Granted legal-status Critical Current

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Abstract

PURPOSE: To make frequency-to-voltage conversion characteristics nearly of the same value in a wide range of input signal frequencies, by changing over a limiting frequency range without changing the degree of frequency-to-voltage conversion.
CONSTITUTION: A series circuit of a capacitor 53 and the collector-emitter of a switching transistor 54 is connected in parallel to a capactior 21, and a change-over signal SW from a terminal 55 is supplied via a resistance 56 to the base of this TR54. When the change-over signal SW is "0", the TRs 54 and 56 go off and an FET63 goes on, and the capacity value is only the capacity value of the capactor 21. The gain of an amplifier 57 of this time is the value determined by a resistance 61, a resistance 62 connected parallel with a resistance 58, and an operational amplifier 59. When the change-over signal SW goes "1", the TRs 54 and 64 go on and the FET63 goes off, and the capacity value is the combined capacity value of the capacitors 21, 53; moreover, the gain of the amplifier 57 is lowered.
COPYRIGHT: (C)1981,JPO&Japio
JP15709679A 1979-12-04 1979-12-04 Frequency-to-voltage converting circuit Granted JPS5679961A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15709679A JPS5679961A (en) 1979-12-04 1979-12-04 Frequency-to-voltage converting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15709679A JPS5679961A (en) 1979-12-04 1979-12-04 Frequency-to-voltage converting circuit

Publications (2)

Publication Number Publication Date
JPS5679961A true JPS5679961A (en) 1981-06-30
JPS6325363B2 JPS6325363B2 (en) 1988-05-25

Family

ID=15642152

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15709679A Granted JPS5679961A (en) 1979-12-04 1979-12-04 Frequency-to-voltage converting circuit

Country Status (1)

Country Link
JP (1) JPS5679961A (en)

Also Published As

Publication number Publication date
JPS6325363B2 (en) 1988-05-25

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