IT1026821B - Oscillatore variabile - Google Patents
Oscillatore variabileInfo
- Publication number
- IT1026821B IT1026821B IT30222/74A IT3022274A IT1026821B IT 1026821 B IT1026821 B IT 1026821B IT 30222/74 A IT30222/74 A IT 30222/74A IT 3022274 A IT3022274 A IT 3022274A IT 1026821 B IT1026821 B IT 1026821B
- Authority
- IT
- Italy
- Prior art keywords
- variable oscillator
- oscillator
- variable
- Prior art date
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
- H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
- H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
- H03B5/36—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device
- H03B5/366—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device and comprising means for varying the frequency by a variable voltage or current
- H03B5/368—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device and comprising means for varying the frequency by a variable voltage or current the means being voltage variable capacitance diodes
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C3/00—Angle modulation
- H03C3/10—Angle modulation by means of variable impedance
- H03C3/12—Angle modulation by means of variable impedance by means of a variable reactive element
- H03C3/22—Angle modulation by means of variable impedance by means of a variable reactive element the element being a semiconductor diode, e.g. varicap diode
- H03C3/222—Angle modulation by means of variable impedance by means of a variable reactive element the element being a semiconductor diode, e.g. varicap diode using 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
- H03B2200/00—Indexing scheme relating to details of oscillators covered by H03B
- H03B2200/003—Circuit elements of oscillators
- H03B2200/004—Circuit elements of oscillators including a variable capacitance, e.g. a varicap, a varactor or a variable capacitance of a diode or 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
- H03B5/02—Details
- H03B5/04—Modifications of generator to compensate for variations in physical values, e.g. power supply, load, temperature
-
- 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
- H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
- H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
- H03B5/36—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device
- H03B5/362—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device the amplifier being a single transistor
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C2200/00—Indexing scheme relating to details of modulators or modulation methods covered by H03C
- H03C2200/0037—Functional aspects of modulators
- H03C2200/0087—Measures to address temperature induced variations of modulation
- H03C2200/0091—Measures to address temperature induced variations of modulation by stabilising the temperature
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP48138442A JPS5087559A (it) | 1973-12-05 | 1973-12-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
IT1026821B true IT1026821B (it) | 1978-10-20 |
Family
ID=15222076
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT30222/74A IT1026821B (it) | 1973-12-05 | 1974-12-05 | Oscillatore variabile |
Country Status (8)
Country | Link |
---|---|
US (1) | US3995233A (it) |
JP (1) | JPS5087559A (it) |
CA (1) | CA1014627A (it) |
DE (1) | DE2457374C2 (it) |
FR (1) | FR2254148B1 (it) |
GB (1) | GB1481630A (it) |
IT (1) | IT1026821B (it) |
NL (1) | NL187776C (it) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5565188A (en) | 1978-11-10 | 1980-05-16 | Seiko Instr & Electronics Ltd | Electronic watch |
DE2945546C2 (de) * | 1979-11-10 | 1983-09-29 | Philips Patentverwaltung Gmbh, 2000 Hamburg | Schaltungsanordnung für abstimmbare HF-Kreise |
FR2501434B1 (fr) * | 1981-03-03 | 1985-10-11 | Cepe | Oscillateur a frequence commandee comportant un element piezoelectrique et presentant une plage de variation de frequence etendue |
US4511863A (en) * | 1983-03-22 | 1985-04-16 | General Electric Company | Combined modulation and temperature compensation circuit |
US4620226A (en) * | 1984-05-17 | 1986-10-28 | Cheung William S H | Apparatus for producing audio and visual signals for modulating a television system carrier signal |
US4607239A (en) * | 1985-02-28 | 1986-08-19 | The United States Of America As Represented By The Secretary Of The Army | Adjustment of the frequency-temperature characteristics of crystal oscillators |
US4630008A (en) * | 1985-03-29 | 1986-12-16 | Weeks Richard W | Direct FM crystal-controlled oscillator |
US4924195A (en) * | 1989-06-19 | 1990-05-08 | At&T Bell Laboratories | Crystal oscillator with broad tuning capability |
US4951007A (en) * | 1989-10-04 | 1990-08-21 | The United States Of America As Represented By The Secretary Of The Army | Temperature compensated crystal oscillator (TCXO) with improved temperature compensation |
US5030926A (en) * | 1990-07-10 | 1991-07-09 | At&T Bell Laboratories | Voltage controlled balanced crystal oscillator circuit |
EP0744836A3 (en) * | 1995-05-25 | 1998-03-25 | Kabushiki Kaisha Meidensha | Temperature compensated crystal oscillator |
CA2446754A1 (en) * | 2001-05-21 | 2002-11-28 | Thomson Licensing S.A. | Wide band voltage controlled crystal oscillator |
JP2003332842A (ja) * | 2002-05-13 | 2003-11-21 | Fujitsu Media Device Kk | 発振器 |
CA2582322C (en) * | 2004-10-11 | 2013-12-10 | Spartak Gevorgian | A varactor device with reduced temperature dependence |
US7511476B2 (en) * | 2005-01-04 | 2009-03-31 | Digisensors, Inc. | Electromagnetic sensor systems and methods of use thereof |
JP6397066B2 (ja) * | 2017-02-20 | 2018-09-26 | 日本電波工業株式会社 | 水晶発振器 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4314672Y1 (it) * | 1965-06-02 | 1968-06-20 | ||
US3373379A (en) * | 1966-06-17 | 1968-03-12 | Motorola Inc | Crystal oscillator with temperature compensation |
US3569865A (en) * | 1969-06-12 | 1971-03-09 | Us Navy | High stability voltage-controlled crystal oscillator |
-
1973
- 1973-12-05 JP JP48138442A patent/JPS5087559A/ja active Pending
-
1974
- 1974-11-27 US US05/527,693 patent/US3995233A/en not_active Expired - Lifetime
- 1974-12-03 NL NLAANVRAGE7415768,A patent/NL187776C/xx not_active IP Right Cessation
- 1974-12-04 CA CA215,243A patent/CA1014627A/en not_active Expired
- 1974-12-04 GB GB52463/74A patent/GB1481630A/en not_active Expired
- 1974-12-04 DE DE2457374A patent/DE2457374C2/de not_active Expired
- 1974-12-05 IT IT30222/74A patent/IT1026821B/it active
- 1974-12-05 FR FR7439892A patent/FR2254148B1/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB1481630A (en) | 1977-08-03 |
NL7415768A (nl) | 1975-06-09 |
USB527693I5 (it) | 1976-02-03 |
NL187776B (nl) | 1991-08-01 |
DE2457374A1 (de) | 1975-06-12 |
JPS5087559A (it) | 1975-07-14 |
DE2457374C2 (de) | 1986-02-13 |
FR2254148A1 (it) | 1975-07-04 |
CA1014627A (en) | 1977-07-26 |
FR2254148B1 (it) | 1978-06-23 |
NL187776C (nl) | 1992-01-02 |
US3995233A (en) | 1976-11-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19931229 |