JPS57192106A - Frequency-voltage converter - Google Patents

Frequency-voltage converter

Info

Publication number
JPS57192106A
JPS57192106A JP7705181A JP7705181A JPS57192106A JP S57192106 A JPS57192106 A JP S57192106A JP 7705181 A JP7705181 A JP 7705181A JP 7705181 A JP7705181 A JP 7705181A JP S57192106 A JPS57192106 A JP S57192106A
Authority
JP
Japan
Prior art keywords
voltage
capacitor
triangle wave
output
circuit
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
JP7705181A
Other languages
Japanese (ja)
Other versions
JPH0230205B2 (en
Inventor
Hideo Omae
Kiyoshi Nishimura
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.)
Rohm Co Ltd
Original Assignee
Rohm 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 Rohm Co Ltd filed Critical Rohm Co Ltd
Priority to JP7705181A priority Critical patent/JPS57192106A/en
Publication of JPS57192106A publication Critical patent/JPS57192106A/en
Publication of JPH0230205B2 publication Critical patent/JPH0230205B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/02—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal
    • H03D3/04—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal by counting or integrating cycles of oscillations

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

PURPOSE:To enable high accuracy and high speed conversion to be made and to simplify the circuit constitution, by optimizing a sample hold of a triangle wave voltage and omitting a pulse generating circuit requiring a time constant circuit. CONSTITUTION:An input signal fIN given to an input terminal 20 is waveshaped 22 and becomes a trigger input T of a T-FF24. An output of the FF24 is inverted in synchronizing with the pulse leading edge and the inverted output activates a sampling circuit 26. That is, a rising voltage of a triangle wave voltage generated by a triangle wave generating circuit 30 is applied a holding capacitor 28 and the charging voltage of the capacitor 28 is charged or discharged in response to the output of the FF24. The charging voltage of the capacitor 28 and the triangle wave voltage are compared at a window comparator 42 and when the difference of both voltages is moved within the window width very narrowly set, a pulse is generated from the comparator 42 and the FF24 is reset. Further, this frequency-voltage conversion output is given with the charging voltage of the capacitor 28 and outputted from a terminal 50.
JP7705181A 1981-05-21 1981-05-21 Frequency-voltage converter Granted JPS57192106A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7705181A JPS57192106A (en) 1981-05-21 1981-05-21 Frequency-voltage converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7705181A JPS57192106A (en) 1981-05-21 1981-05-21 Frequency-voltage converter

Publications (2)

Publication Number Publication Date
JPS57192106A true JPS57192106A (en) 1982-11-26
JPH0230205B2 JPH0230205B2 (en) 1990-07-05

Family

ID=13622980

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7705181A Granted JPS57192106A (en) 1981-05-21 1981-05-21 Frequency-voltage converter

Country Status (1)

Country Link
JP (1) JPS57192106A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5677052A (en) * 1979-10-31 1981-06-25 Asea Ab Agitating method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5677052A (en) * 1979-10-31 1981-06-25 Asea Ab Agitating method

Also Published As

Publication number Publication date
JPH0230205B2 (en) 1990-07-05

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