JPS55112006A - Oscillator - Google Patents

Oscillator

Info

Publication number
JPS55112006A
JPS55112006A JP1935579A JP1935579A JPS55112006A JP S55112006 A JPS55112006 A JP S55112006A JP 1935579 A JP1935579 A JP 1935579A JP 1935579 A JP1935579 A JP 1935579A JP S55112006 A JPS55112006 A JP S55112006A
Authority
JP
Japan
Prior art keywords
transistor
transistors
collector
resistance
base
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
JP1935579A
Other languages
Japanese (ja)
Other versions
JPS6217884B2 (en
Inventor
Masami Miura
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 JP1935579A priority Critical patent/JPS55112006A/en
Publication of JPS55112006A publication Critical patent/JPS55112006A/en
Publication of JPS6217884B2 publication Critical patent/JPS6217884B2/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
    • H03B5/08—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
    • H03B5/1206—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 using multiple transistors for amplification
    • H03B5/1212—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 using multiple transistors for amplification the amplifier comprising a pair of transistors, wherein an output terminal of each being connected to an input terminal of the other, e.g. a cross coupled pair
    • H03B5/1215—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 using multiple transistors for amplification the amplifier comprising a pair of transistors, wherein an output terminal of each being connected to an input terminal of the other, e.g. a cross coupled pair the current source or degeneration circuit being in common to both transistors of the pair, e.g. a cross-coupled long-tailed pair
    • 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
    • H03B5/1243—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 the means comprising voltage variable capacitance diodes

Abstract

PURPOSE:To improve both the spurious and cross modulation characteristics by reducing the oscillation amplitude which is applied to the variable capacity diode. CONSTITUTION:The common emitter of the differential amplifier consisting of transistors 11 and 12 is connected to constant current source 13. At the same time, the collector of transistor 11 is connected to the base of transistor 12 through resistance 17 along with connection of the collector of transistor 12 to the base of transistor 11 through resistance 16 each. Thus the positive feedback loop is formed. In addition, the parallel resonance circuit comprising resonance coil 18, coupling capacitor 20, bypass capacitors 19 and 20 plus variable capacity diode 21 is connected to the bases of transistors 11 and 12. Thus the frequency of the oscillation voltage generated at terminal C is decided by the resonance frequency.
JP1935579A 1979-02-21 1979-02-21 Oscillator Granted JPS55112006A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1935579A JPS55112006A (en) 1979-02-21 1979-02-21 Oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1935579A JPS55112006A (en) 1979-02-21 1979-02-21 Oscillator

Publications (2)

Publication Number Publication Date
JPS55112006A true JPS55112006A (en) 1980-08-29
JPS6217884B2 JPS6217884B2 (en) 1987-04-20

Family

ID=11997061

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1935579A Granted JPS55112006A (en) 1979-02-21 1979-02-21 Oscillator

Country Status (1)

Country Link
JP (1) JPS55112006A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07226626A (en) * 1993-12-14 1995-08-22 Samsung Electron Co Ltd Control oscillator for synchronous video detector
KR100366196B1 (en) * 1992-12-28 2003-03-03 소니 가부시끼 가이샤 oscillator

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963996A (en) * 1974-09-05 1976-06-15 Zenith Radio Corporation Oscillation system for integrated circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963996A (en) * 1974-09-05 1976-06-15 Zenith Radio Corporation Oscillation system for integrated circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100366196B1 (en) * 1992-12-28 2003-03-03 소니 가부시끼 가이샤 oscillator
JPH07226626A (en) * 1993-12-14 1995-08-22 Samsung Electron Co Ltd Control oscillator for synchronous video detector
US5479137A (en) * 1993-12-14 1995-12-26 Samsung Electronics Co., Ltd. Controlled oscillator, as for synchyronous video detector

Also Published As

Publication number Publication date
JPS6217884B2 (en) 1987-04-20

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