IT948767B - Generatore di frequenze variabili a circuito d asservimento - Google Patents
Generatore di frequenze variabili a circuito d asservimentoInfo
- Publication number
- IT948767B IT948767B IT4863272A IT4863272A IT948767B IT 948767 B IT948767 B IT 948767B IT 4863272 A IT4863272 A IT 4863272A IT 4863272 A IT4863272 A IT 4863272A IT 948767 B IT948767 B IT 948767B
- Authority
- IT
- Italy
- Prior art keywords
- variable frequency
- frequency generator
- circuit variable
- serving circuit
- serving
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
- H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
- H03L7/183—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number
- H03L7/187—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number using means for coarse tuning the voltage controlled oscillator of the loop
- H03L7/189—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number using means for coarse tuning the voltage controlled oscillator of the loop comprising a D/A converter for generating a coarse tuning voltage
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
- H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
- H03L7/197—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division
- H03L7/1972—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division for reducing the locking time interval
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7107133A FR2128056B1 (es) | 1971-03-02 | 1971-03-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT948767B true IT948767B (it) | 1973-06-11 |
Family
ID=9072749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT4863272A IT948767B (it) | 1971-03-02 | 1972-02-29 | Generatore di frequenze variabili a circuito d asservimento |
Country Status (9)
| Country | Link |
|---|---|
| BE (1) | BE780113A (es) |
| DE (1) | DE2209385C2 (es) |
| ES (1) | ES400258A1 (es) |
| FR (1) | FR2128056B1 (es) |
| GB (1) | GB1333534A (es) |
| IT (1) | IT948767B (es) |
| NL (1) | NL7202601A (es) |
| NO (1) | NO133052C (es) |
| SE (1) | SE369651B (es) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1290407C (en) * | 1986-12-23 | 1991-10-08 | Shigeki Saito | Frequency synthesizer |
| DE3939709A1 (de) * | 1989-12-01 | 1991-06-06 | Bosch Gmbh Robert | Verfahren zur abstimmung eines funksende- und/oder -empfangsgeraetes |
| JPH03224322A (ja) * | 1990-01-29 | 1991-10-03 | Toshiba Corp | 選局回路 |
| DE4017491C2 (de) * | 1990-05-31 | 2002-05-08 | Siemens Ag | Abstimmschaltung |
| JP3033654B2 (ja) * | 1993-08-23 | 2000-04-17 | 日本電気株式会社 | Ｐｌｌ周波数シンセサイザ |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1067454A (en) * | 1963-06-21 | 1967-05-03 | Plessey Uk Ltd | Improvements in or relating to controlled frequency electrical oscillation generators |
| US3588732A (en) * | 1969-01-16 | 1971-06-28 | Collins Radio Co | Frequency synthesizer |
-
1971
- 1971-03-02 FR FR7107133A patent/FR2128056B1/fr not_active Expired
-
1972
- 1972-02-28 DE DE19722209385 patent/DE2209385C2/de not_active Expired
- 1972-02-28 NO NO59972A patent/NO133052C/no unknown
- 1972-02-29 ES ES400258A patent/ES400258A1/es not_active Expired
- 1972-02-29 IT IT4863272A patent/IT948767B/it active
- 1972-02-29 NL NL7202601A patent/NL7202601A/xx not_active Application Discontinuation
- 1972-03-01 GB GB964572A patent/GB1333534A/en not_active Expired
- 1972-03-01 SE SE261272A patent/SE369651B/xx unknown
- 1972-03-02 BE BE780113A patent/BE780113A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB1333534A (en) | 1973-10-10 |
| FR2128056B1 (es) | 1974-04-26 |
| NO133052C (es) | 1976-02-25 |
| ES400258A1 (es) | 1975-01-01 |
| DE2209385C2 (de) | 1981-12-03 |
| FR2128056A1 (es) | 1972-10-20 |
| NL7202601A (es) | 1972-09-05 |
| DE2209385A1 (de) | 1972-09-07 |
| SE369651B (es) | 1974-09-09 |
| BE780113A (fr) | 1972-07-03 |
| NO133052B (es) | 1975-11-17 |
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