JPS5661818A - Sine wave oscillator - Google Patents

Sine wave oscillator

Info

Publication number
JPS5661818A
JPS5661818A JP13704579A JP13704579A JPS5661818A JP S5661818 A JPS5661818 A JP S5661818A JP 13704579 A JP13704579 A JP 13704579A JP 13704579 A JP13704579 A JP 13704579A JP S5661818 A JPS5661818 A JP S5661818A
Authority
JP
Japan
Prior art keywords
fet5
source
fet10
resistance
drain
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
JP13704579A
Other languages
Japanese (ja)
Other versions
JPS6145901B2 (en
Inventor
Taiki Uchiumi
Yoshio Yoshida
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.)
Yokogawa Electric Corp
Original Assignee
Yokogawa Hokushin Electric Corp
Yokogawa Electric Works 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 Yokogawa Hokushin Electric Corp, Yokogawa Electric Works Ltd filed Critical Yokogawa Hokushin Electric Corp
Priority to JP13704579A priority Critical patent/JPS5661818A/en
Publication of JPS5661818A publication Critical patent/JPS5661818A/en
Publication of JPS6145901B2 publication Critical patent/JPS6145901B2/ja
Granted 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

  • Filters And Equalizers (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Networks Using Active Elements (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE:To satisfy at one time both the waveform distortion and the stability of the sine wave oscillator, by just adding one unit of the EFT to the conventional circuit using the Wien bridge. CONSTITUTION:The EFT10 having the same property as the FET5 is connected in series between the resistance 4 and the FET5, and the polarity of the drain source of the FET10 is made opposite to that of the FET5. At the same time, a short circuit is given between the gate and the source of the FET10. Thus the voltage VGS between the gate and the source is set to zero for the FET10 and the value near zero for the FET5 each for operation. In this case, the resistance between the source and the drain becomes constant at all times regardless of the level or the polarity of the drain-source voltage VDS. In other words, the resistance has a linear change to the change of VDS over a wide range. Thus a linear element is obtained. As a result, an oscillator which satisfies at one time both the waveform distortion and the stability can be formed. The same effect is secured if the FET5 and 10 are connected in reverse parallel.
JP13704579A 1979-10-25 1979-10-25 Sine wave oscillator Granted JPS5661818A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13704579A JPS5661818A (en) 1979-10-25 1979-10-25 Sine wave oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13704579A JPS5661818A (en) 1979-10-25 1979-10-25 Sine wave oscillator

Publications (2)

Publication Number Publication Date
JPS5661818A true JPS5661818A (en) 1981-05-27
JPS6145901B2 JPS6145901B2 (en) 1986-10-11

Family

ID=15189572

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13704579A Granted JPS5661818A (en) 1979-10-25 1979-10-25 Sine wave oscillator

Country Status (1)

Country Link
JP (1) JPS5661818A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02312307A (en) * 1989-05-26 1990-12-27 Nec Corp Cr oscillating circuit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4947309A (en) * 1972-09-12 1974-05-08
JPS5239056A (en) * 1975-09-16 1977-03-26 Stroemungsmasch Anst Divided ring packing for sealing high pressure shaft
JPS5472936A (en) * 1977-11-22 1979-06-11 Fujitsu Ltd Resistance-variable circuit of voltage control type
JPS5491034A (en) * 1977-12-28 1979-07-19 Nec Corp Variable attenuator circuit of voltage control type

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4947309A (en) * 1972-09-12 1974-05-08
JPS5239056A (en) * 1975-09-16 1977-03-26 Stroemungsmasch Anst Divided ring packing for sealing high pressure shaft
JPS5472936A (en) * 1977-11-22 1979-06-11 Fujitsu Ltd Resistance-variable circuit of voltage control type
JPS5491034A (en) * 1977-12-28 1979-07-19 Nec Corp Variable attenuator circuit of voltage control type

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02312307A (en) * 1989-05-26 1990-12-27 Nec Corp Cr oscillating circuit

Also Published As

Publication number Publication date
JPS6145901B2 (en) 1986-10-11

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