JPS54101251A - Local oscillation circuit - Google Patents

Local oscillation circuit

Info

Publication number
JPS54101251A
JPS54101251A JP727478A JP727478A JPS54101251A JP S54101251 A JPS54101251 A JP S54101251A JP 727478 A JP727478 A JP 727478A JP 727478 A JP727478 A JP 727478A JP S54101251 A JPS54101251 A JP S54101251A
Authority
JP
Japan
Prior art keywords
capacitor
oscillation circuit
local oscillation
collector
variation
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
JP727478A
Other languages
Japanese (ja)
Inventor
Akira Masuda
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP727478A priority Critical patent/JPS54101251A/en
Publication of JPS54101251A publication Critical patent/JPS54101251A/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
    • H03B5/18—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance
    • 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
    • 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
    • H03B5/1237—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 comprising means for varying the frequency of the generator
    • H03B5/124—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 comprising means for varying the frequency of the generator the means comprising a voltage dependent capacitance

Landscapes

  • Superheterodyne Receivers (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

PURPOSE:To establish the local oscillation circuit in which the variation of the oscillated frequency can be less. CONSTITUTION:The capacitor C2 and the emitter resistor R are parallelly connected between the emitter of transistor Q1 and the cavity P, and the base of Q1 is connected to P via the through-capacitor C0. C1 is a stray capacitance. The inductance L is constituted with the lambda/2 distributed line l of both end open type and the capacitor C4. Further, small capacitor C5 is connected between the collector of Q1 and the distributed constant line l. Since C5 takes a form of pair series connection to the junction capacitance C0b between the collector and base of Q1, even if C0b is varied with the change is the power supply voltage, the amount of variation is small to the entire capacitance value and the effect on the oscillated frequency is less.
JP727478A 1978-01-27 1978-01-27 Local oscillation circuit Pending JPS54101251A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP727478A JPS54101251A (en) 1978-01-27 1978-01-27 Local oscillation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP727478A JPS54101251A (en) 1978-01-27 1978-01-27 Local oscillation circuit

Publications (1)

Publication Number Publication Date
JPS54101251A true JPS54101251A (en) 1979-08-09

Family

ID=11661440

Family Applications (1)

Application Number Title Priority Date Filing Date
JP727478A Pending JPS54101251A (en) 1978-01-27 1978-01-27 Local oscillation circuit

Country Status (1)

Country Link
JP (1) JPS54101251A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60190004A (en) * 1984-03-09 1985-09-27 Matsushita Electric Ind Co Ltd Oscillating circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60190004A (en) * 1984-03-09 1985-09-27 Matsushita Electric Ind Co Ltd Oscillating circuit

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