JPS54117665A - Wien bridge type sine wave oscillator - Google Patents

Wien bridge type sine wave oscillator

Info

Publication number
JPS54117665A
JPS54117665A JP2490178A JP2490178A JPS54117665A JP S54117665 A JPS54117665 A JP S54117665A JP 2490178 A JP2490178 A JP 2490178A JP 2490178 A JP2490178 A JP 2490178A JP S54117665 A JPS54117665 A JP S54117665A
Authority
JP
Japan
Prior art keywords
output
oscillator
voltage
sine wave
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.)
Pending
Application number
JP2490178A
Other languages
Japanese (ja)
Inventor
Shoji Mitani
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP2490178A priority Critical patent/JPS54117665A/en
Publication of JPS54117665A publication Critical patent/JPS54117665A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/20—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator
    • H03B5/26—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator frequency-determining element being part of bridge circuit in closed ring around which signal is transmitted; frequency-determining element being connected via a bridge circuit to such a closed ring, e.g. Wien-Bridge oscillator, parallel-T oscillator

Landscapes

  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE:To compensate a temperature change and a load change to generate always a fixed-amplitude sine wave by feeding back the signal voltage, which is obtained by comparing and amplifying the rectified smooth voltage of the oscillated output and a constant voltage, to the oscillator. CONSTITUTION:In wien bridge type sine wave oscillator 1 using operational amplifier 8, rectifier smoothing circuit 10 where the output of oscillator 1 is inputted through voltage follower 9 is provided to apply the DC output from circuit 10 to input terminal b of differential amplifier 11. Then, the constant voltage obtained by making power source voltages -V and +V into the constant voltage by a Zener diode is applied to input terminal C of amplifier 11 through voltage follower 12, and is compared with the DC output of circuit 10. Then, the output obtained by comparing the constant voltage and the DC output of circuit 10 in amplifier 11 is fed back to the input side of oscillator 1 through FET 18, thereby holding the amplitude of oscillator 1 fixed.
JP2490178A 1978-03-04 1978-03-04 Wien bridge type sine wave oscillator Pending JPS54117665A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2490178A JPS54117665A (en) 1978-03-04 1978-03-04 Wien bridge type sine wave oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2490178A JPS54117665A (en) 1978-03-04 1978-03-04 Wien bridge type sine wave oscillator

Publications (1)

Publication Number Publication Date
JPS54117665A true JPS54117665A (en) 1979-09-12

Family

ID=12151077

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2490178A Pending JPS54117665A (en) 1978-03-04 1978-03-04 Wien bridge type sine wave oscillator

Country Status (1)

Country Link
JP (1) JPS54117665A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04505533A (en) * 1989-06-02 1992-09-24 モトローラ・インコーポレーテッド Voltage controlled oscillator with automatic current control

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04505533A (en) * 1989-06-02 1992-09-24 モトローラ・インコーポレーテッド Voltage controlled oscillator with automatic current control

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