IT1218072B - Circuito per la sintonizzazione ad alta efficienza di frequenze video - Google Patents
Circuito per la sintonizzazione ad alta efficienza di frequenze videoInfo
- Publication number
- IT1218072B IT1218072B IT20947/88A IT2094788A IT1218072B IT 1218072 B IT1218072 B IT 1218072B IT 20947/88 A IT20947/88 A IT 20947/88A IT 2094788 A IT2094788 A IT 2094788A IT 1218072 B IT1218072 B IT 1218072B
- Authority
- IT
- Italy
- Prior art keywords
- circuit
- video frequencies
- efficiency tuning
- tuning
- efficiency
- 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
- H03L7/197—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
- H03L7/199—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 with reset of the frequency divider or the counter, e.g. for assuring initial synchronisation
-
- 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
- H03L7/08—Details of the phase-locked loop
- H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
- H03L7/087—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using at least two phase detectors or a frequency and phase detector in the loop
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT20947/88A IT1218072B (it) | 1988-06-13 | 1988-06-13 | Circuito per la sintonizzazione ad alta efficienza di frequenze video |
EP89108741A EP0346623A3 (en) | 1988-06-13 | 1989-05-16 | A circuit for high-efficiency tuning video frequencies |
US07/359,353 US4970473A (en) | 1988-06-13 | 1989-05-31 | Phase locked loop having parallel comparators |
JP1148567A JPH02112314A (ja) | 1988-06-13 | 1989-06-13 | ビデオ周波数同調回路 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT20947/88A IT1218072B (it) | 1988-06-13 | 1988-06-13 | Circuito per la sintonizzazione ad alta efficienza di frequenze video |
Publications (2)
Publication Number | Publication Date |
---|---|
IT8820947A0 IT8820947A0 (it) | 1988-06-13 |
IT1218072B true IT1218072B (it) | 1990-04-12 |
Family
ID=11174472
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT20947/88A IT1218072B (it) | 1988-06-13 | 1988-06-13 | Circuito per la sintonizzazione ad alta efficienza di frequenze video |
Country Status (4)
Country | Link |
---|---|
US (1) | US4970473A (it) |
EP (1) | EP0346623A3 (it) |
JP (1) | JPH02112314A (it) |
IT (1) | IT1218072B (it) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AR241983A1 (es) * | 1989-03-23 | 1993-01-29 | Siemens Ag | Disposicion de circuito para transformar una secuencia discontinua de pulsos de reloj de entrada en una secuencia continua de pulsos de reloj de salida con la misma cantidad de pulsos. |
JPH07302938A (ja) * | 1994-04-28 | 1995-11-14 | Sony Corp | 圧電セラミックトランス及びその製造方法 |
US5798667A (en) * | 1994-05-16 | 1998-08-25 | At&T Global Information Solutions Company | Method and apparatus for regulation of power dissipation |
US5631933A (en) * | 1996-02-21 | 1997-05-20 | Hewlett-Packard Company | Phase-locked digital synthesizers |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1121323A (en) * | 1964-09-04 | 1968-07-24 | Plessey Uk Ltd | Improvements in electrical oscillation generators |
FR1452109A (fr) * | 1965-06-30 | 1966-02-25 | Materiel Telephonique | Oscillateur variable stabilisé |
US3458823A (en) * | 1967-03-20 | 1969-07-29 | Weston Instruments Inc | Frequency coincidence detector |
US3703686A (en) * | 1971-09-17 | 1972-11-21 | Hekimian Laboratories Inc | Phase lock loop and frequency discriminator employed therein |
US4069462A (en) * | 1976-12-13 | 1978-01-17 | Data General Corporation | Phase-locked loops |
JPS5394755A (en) * | 1977-01-31 | 1978-08-19 | Toshiba Corp | Frequency feedback type circuit |
US4280104A (en) * | 1979-08-10 | 1981-07-21 | Matsushita Electric Corporation Of America | Phase locked loop system with improved acquisition |
JPS57164620A (en) * | 1981-04-02 | 1982-10-09 | Sony Corp | Phase comparator |
-
1988
- 1988-06-13 IT IT20947/88A patent/IT1218072B/it active
-
1989
- 1989-05-16 EP EP89108741A patent/EP0346623A3/en not_active Withdrawn
- 1989-05-31 US US07/359,353 patent/US4970473A/en not_active Expired - Lifetime
- 1989-06-13 JP JP1148567A patent/JPH02112314A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
EP0346623A2 (en) | 1989-12-20 |
US4970473A (en) | 1990-11-13 |
JPH02112314A (ja) | 1990-04-25 |
EP0346623A3 (en) | 1990-03-21 |
IT8820947A0 (it) | 1988-06-13 |
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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: 19970628 |