JPS56149826A - Voltage-frequency converting circuit - Google Patents

Voltage-frequency converting circuit

Info

Publication number
JPS56149826A
JPS56149826A JP5378580A JP5378580A JPS56149826A JP S56149826 A JPS56149826 A JP S56149826A JP 5378580 A JP5378580 A JP 5378580A JP 5378580 A JP5378580 A JP 5378580A JP S56149826 A JPS56149826 A JP S56149826A
Authority
JP
Japan
Prior art keywords
capacitor
voltage
reference voltage
output
flop
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
JP5378580A
Other languages
Japanese (ja)
Inventor
Masakazu Mori
Sadao Ifukuro
Satoshi Ikeuchi
Toshiyuki Yamashita
Yasuo Nagai
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP5378580A priority Critical patent/JPS56149826A/en
Publication of JPS56149826A publication Critical patent/JPS56149826A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K7/00—Modulating pulses with a continuously-variable modulating signal
    • H03K7/06—Frequency or rate modulation, i.e. PFM or PRM

Abstract

PURPOSE:To improve the noise resisting property by discharging electricity from a capacitor entirely. CONSTITUTION:The capacitor 2 is charged with an electric current which is in proportion to the input voltage Vin. When the terminal voltage of the capacitor exceeds the reference voltage of the comparator 3, the output B is generated and a pulse output can be obtained from the monostable multivibrator 4. Also in this case, the flip-flop 7 is inverted and immediately the reference voltage is lowered. In this case, the voltage-currrent transducer 8 is operated and discharges the capacitor 2 by an electric current which is in proportion to the terminal voltage of the capacitor 2. When the terminal voltage of the capacitor 2 becomes the reference voltage or below, the output of the comparator 3 is gone, and the electric discharge is stopped by inverting the flip-flop 7 and raising the reference voltage.
JP5378580A 1980-04-23 1980-04-23 Voltage-frequency converting circuit Pending JPS56149826A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5378580A JPS56149826A (en) 1980-04-23 1980-04-23 Voltage-frequency converting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5378580A JPS56149826A (en) 1980-04-23 1980-04-23 Voltage-frequency converting circuit

Publications (1)

Publication Number Publication Date
JPS56149826A true JPS56149826A (en) 1981-11-19

Family

ID=12952465

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5378580A Pending JPS56149826A (en) 1980-04-23 1980-04-23 Voltage-frequency converting circuit

Country Status (1)

Country Link
JP (1) JPS56149826A (en)

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