JPS54107658A - Oscillation circuit - Google Patents

Oscillation circuit

Info

Publication number
JPS54107658A
JPS54107658A JP1436078A JP1436078A JPS54107658A JP S54107658 A JPS54107658 A JP S54107658A JP 1436078 A JP1436078 A JP 1436078A JP 1436078 A JP1436078 A JP 1436078A JP S54107658 A JPS54107658 A JP S54107658A
Authority
JP
Japan
Prior art keywords
transistor
emitter
voltage
oscillation circuit
power supply
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
JP1436078A
Other languages
Japanese (ja)
Inventor
Yozo Kabayama
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP1436078A priority Critical patent/JPS54107658A/en
Publication of JPS54107658A publication Critical patent/JPS54107658A/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
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
    • H03B5/1203—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the amplifier being a single transistor
    • 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
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
    • H03B5/1231—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the amplifier comprising one or more bipolar transistors

Abstract

PURPOSE:To make stable the oscillation by connecting a constant current source to the emitter, in the oscillation circuit making positive feedback between the base and the emitter of transistor. CONSTITUTION:The base bias of the transistor Q3 is given by the diodes D1 and D2 having strong constant voltage performance, and taking the forward voltage drop of one diode as VF, the collector current IC2 of the transistor Q2 is approximately VF/R8, whoch is independently of the variation of the power supply voltage V2. The emitter capacitance of the transistor Q2 is greatly dependent on the collector current IC2, but since the emitter capacitance is made stable by this, the resonant frequency f0 is made stable with the voltage variation of the power supply voltage V2.
JP1436078A 1978-02-10 1978-02-10 Oscillation circuit Pending JPS54107658A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1436078A JPS54107658A (en) 1978-02-10 1978-02-10 Oscillation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1436078A JPS54107658A (en) 1978-02-10 1978-02-10 Oscillation circuit

Publications (1)

Publication Number Publication Date
JPS54107658A true JPS54107658A (en) 1979-08-23

Family

ID=11858887

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1436078A Pending JPS54107658A (en) 1978-02-10 1978-02-10 Oscillation circuit

Country Status (1)

Country Link
JP (1) JPS54107658A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6085604A (en) * 1983-10-17 1985-05-15 Toyo Commun Equip Co Ltd Colpitts oscillation circuit
JPS6229208A (en) * 1985-07-30 1987-02-07 Matsushita Electric Ind Co Ltd Local oscillation circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6085604A (en) * 1983-10-17 1985-05-15 Toyo Commun Equip Co Ltd Colpitts oscillation circuit
JPS6229208A (en) * 1985-07-30 1987-02-07 Matsushita Electric Ind Co Ltd Local oscillation circuit

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