IT1034534B - Impianto automatico di controllo di frequenza - Google Patents
Impianto automatico di controllo di frequenzaInfo
- Publication number
- IT1034534B IT1034534B IT21650/75A IT2165075A IT1034534B IT 1034534 B IT1034534 B IT 1034534B IT 21650/75 A IT21650/75 A IT 21650/75A IT 2165075 A IT2165075 A IT 2165075A IT 1034534 B IT1034534 B IT 1034534B
- Authority
- IT
- Italy
- Prior art keywords
- control system
- frequency control
- automatic frequency
- automatic
- frequency
- 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
- H03L7/181—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 numerical count result being used for locking the loop, the counter counting during fixed time intervals
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US455109A US3893040A (en) | 1974-03-27 | 1974-03-27 | Digital automatic frequency control system |
Publications (1)
Publication Number | Publication Date |
---|---|
IT1034534B true IT1034534B (it) | 1979-10-10 |
Family
ID=23807438
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT21650/75A IT1034534B (it) | 1974-03-27 | 1975-03-26 | Impianto automatico di controllo di frequenza |
Country Status (2)
Country | Link |
---|---|
US (1) | US3893040A (it) |
IT (1) | IT1034534B (it) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4110701A (en) * | 1977-03-14 | 1978-08-29 | Cgs Systems, Inc. | Method and apparatus for near-synchronization of a pair of oscillators, and measuring thereby |
US4122391A (en) * | 1977-09-19 | 1978-10-24 | Gte Automatic Electric Laboratories Incorporated | Frequency deviation measuring and adjusting system |
US4330758A (en) * | 1980-02-20 | 1982-05-18 | Motorola, Inc. | Synchronized frequency synthesizer with high speed lock |
US5258720A (en) * | 1984-03-02 | 1993-11-02 | Itt Corporation | Digital sample and hold phase detector |
GB2267617B (en) * | 1985-04-15 | 1994-04-27 | Int Standard Electric Corp | A digital sample and hold phase detector |
EP0443221A1 (en) * | 1990-02-14 | 1991-08-28 | Atlas Powder Company | Method and apparatus for a calibrated electronic timing circuit |
DE4021846A1 (de) * | 1990-07-09 | 1992-01-16 | Ant Nachrichtentech | Mikrowellenoszillator |
JPH0795053A (ja) * | 1993-09-20 | 1995-04-07 | Fujitsu Ltd | 周波数同期回路 |
JPH0795052A (ja) * | 1993-09-20 | 1995-04-07 | Fujitsu Ltd | 周波数同期回路 |
US5521556A (en) * | 1995-01-27 | 1996-05-28 | American Microsystems, Inc. | Frequency converter utilizing a feedback control loop |
JP3331104B2 (ja) * | 1995-09-19 | 2002-10-07 | 富士通株式会社 | デジタルpll回路並びにこれに用いられるデジタル周波数調整回路及びデジタル位相調整回路、並びに半導体装置 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3259851A (en) * | 1961-11-01 | 1966-07-05 | Avco Corp | Digital system for stabilizing the operation of a variable frequency oscillator |
US3370252A (en) * | 1966-07-11 | 1968-02-20 | Avco Corp | Digital automatic frequency control system |
DE1591819C3 (de) * | 1967-10-24 | 1973-10-18 | Wandel U. Goltermann, 7410 Reutlingen | Dekadisch einstellbarer Wobbeisender |
-
1974
- 1974-03-27 US US455109A patent/US3893040A/en not_active Expired - Lifetime
-
1975
- 1975-03-26 IT IT21650/75A patent/IT1034534B/it active
Also Published As
Publication number | Publication date |
---|---|
US3893040A (en) | 1975-07-01 |
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