JPS56162187A - Sine wave generating circuit - Google Patents

Sine wave generating circuit

Info

Publication number
JPS56162187A
JPS56162187A JP6577980A JP6577980A JPS56162187A JP S56162187 A JPS56162187 A JP S56162187A JP 6577980 A JP6577980 A JP 6577980A JP 6577980 A JP6577980 A JP 6577980A JP S56162187 A JPS56162187 A JP S56162187A
Authority
JP
Japan
Prior art keywords
operational amplifier
sine wave
control input
amplitude
amplitude control
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
JP6577980A
Other languages
Japanese (ja)
Inventor
Akio Akao
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP6577980A priority Critical patent/JPS56162187A/en
Publication of JPS56162187A publication Critical patent/JPS56162187A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/04—Modifications of control circuit to reduce distortion caused by control

Landscapes

  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Amplitude Modulation (AREA)

Abstract

PURPOSE:To give an amplitude modulating function where Dc components are not changed even if an amplitude control input is changed, by obtaining a sine wave output which changes the amplitude in proportion to the amplitude control input. CONSTITUTION:Variable resistors 11 and 12 are provided for adjustment of a modulation degree, and the output potential V1 of an operational amplifier 1 is determined by adjustment of their resistance values directly. That is, the circuit around the operational amplifier 1 is an adding circuit for outputs VA' and VS of variable resistors 11 and 12, and the output potential V1 is expressed by an expression 1 and changes in accordance with VA' or in proportion to an amplitude control input VA. In respect to the output potential V4 of an operational amplifier 2, when respective collector potentials of transistors 22 and 23 are denoted as V2 and V3 and resistance values of a variable resistor 20, a resistor 21, and resistors 17 and 19 are denoted as R1, R2 and R3 respectively, V4 is expressed by an expression 2. This signal V4 has haigh frequency components cut by LPFs cascaded in two stages, and a sine wave output signal V0 is obtained from the output terminal of an operational amplifier 4.
JP6577980A 1980-05-16 1980-05-16 Sine wave generating circuit Pending JPS56162187A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6577980A JPS56162187A (en) 1980-05-16 1980-05-16 Sine wave generating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6577980A JPS56162187A (en) 1980-05-16 1980-05-16 Sine wave generating circuit

Publications (1)

Publication Number Publication Date
JPS56162187A true JPS56162187A (en) 1981-12-12

Family

ID=13296859

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6577980A Pending JPS56162187A (en) 1980-05-16 1980-05-16 Sine wave generating circuit

Country Status (1)

Country Link
JP (1) JPS56162187A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6253004A (en) * 1985-09-02 1987-03-07 Furuno Electric Co Ltd Amplitude modulation circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6253004A (en) * 1985-09-02 1987-03-07 Furuno Electric Co Ltd Amplitude modulation circuit

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