JPS57124925A - Voltage controlled oscillator - Google Patents

Voltage controlled oscillator

Info

Publication number
JPS57124925A
JPS57124925A JP1095781A JP1095781A JPS57124925A JP S57124925 A JPS57124925 A JP S57124925A JP 1095781 A JP1095781 A JP 1095781A JP 1095781 A JP1095781 A JP 1095781A JP S57124925 A JPS57124925 A JP S57124925A
Authority
JP
Japan
Prior art keywords
trs
pair
controlled oscillator
voltage controlled
common
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
JP1095781A
Other languages
Japanese (ja)
Inventor
Fujio Maki
Onori Murakami
Keiichiro Horai
Minoru Matsushima
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP1095781A priority Critical patent/JPS57124925A/en
Publication of JPS57124925A publication Critical patent/JPS57124925A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
    • H03K3/28—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback
    • H03K3/281—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator
    • H03K3/282—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator astable
    • H03K3/2821—Emitters connected to one another by using a capacitor

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

PURPOSE:To obtain an oscillation frequency stable to the change in ambient temperature, by common connection of a pair of transistors (TRs) to a pair of TRs functioning as a major part of a voltage controlled oscillator, and connecting a common emitter to a constant current source. CONSTITUTION:A pair of TRs 37, 38 are connected to the base of a pair of TRs 33, 34 constituting a voltage controlled oscillator in common, and the collector is connected to the emitter of TRs 31, 32 and the base of the TRs 34, 33, respectively. The TRs 37, 38 are in common emitter connection and connected to a constant current source consisting of a TR47 and a resistor 49, and the base of the TR47 is connected to a division circuit consisting of resistors 36, 45 and a diode 46 connected to a power supply terminal. The temperature characteristic of the oscillation frequency (f) of the circuit is determined with the temperature characteristics of forward voltages VD26, VD56 of diodes 26, 56, and since the ratio is not changed despite temperature change, the oscillation frequency (f) is not fluctuated.
JP1095781A 1981-01-27 1981-01-27 Voltage controlled oscillator Pending JPS57124925A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1095781A JPS57124925A (en) 1981-01-27 1981-01-27 Voltage controlled oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1095781A JPS57124925A (en) 1981-01-27 1981-01-27 Voltage controlled oscillator

Publications (1)

Publication Number Publication Date
JPS57124925A true JPS57124925A (en) 1982-08-04

Family

ID=11764658

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1095781A Pending JPS57124925A (en) 1981-01-27 1981-01-27 Voltage controlled oscillator

Country Status (1)

Country Link
JP (1) JPS57124925A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52140256A (en) * 1976-05-18 1977-11-22 Matsushita Electric Ind Co Ltd Multi-vibrator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52140256A (en) * 1976-05-18 1977-11-22 Matsushita Electric Ind Co Ltd Multi-vibrator

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