CA1203330A - Digital aft system which is activated during vertical retrace intervals - Google Patents
Digital aft system which is activated during vertical retrace intervalsInfo
- Publication number
- CA1203330A CA1203330A CA000435566A CA435566A CA1203330A CA 1203330 A CA1203330 A CA 1203330A CA 000435566 A CA000435566 A CA 000435566A CA 435566 A CA435566 A CA 435566A CA 1203330 A CA1203330 A CA 1203330A
- Authority
- CA
- Canada
- Prior art keywords
- signal
- tuning control
- count
- frequency
- counter
- 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.)
- Expired
Links
- 238000005259 measurement Methods 0.000 claims abstract description 82
- 230000004044 response Effects 0.000 claims description 69
- 230000015572 biosynthetic process Effects 0.000 claims description 47
- 238000003786 synthesis reaction Methods 0.000 claims description 47
- 238000012545 processing Methods 0.000 claims description 11
- 238000012360 testing method Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims 1
- 230000008859 change Effects 0.000 description 7
- 239000002131 composite material Substances 0.000 description 7
- XLNZEKHULJKQBA-UHFFFAOYSA-N terbufos Chemical compound CCOP(=S)(OCC)SCSC(C)(C)C XLNZEKHULJKQBA-UHFFFAOYSA-N 0.000 description 7
- 230000001419 dependent effect Effects 0.000 description 6
- 238000010894 electron beam technology Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 4
- 239000000969 carrier Substances 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 101150087426 Gnal gene Proteins 0.000 description 2
- 238000003491 array Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 101100180382 Mus musculus Jaml gene Proteins 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- VREFGVBLTWBCJP-UHFFFAOYSA-N alprazolam Chemical compound C12=CC(Cl)=CC=C2N2C(C)=NN=C2CN=C1C1=CC=CC=C1 VREFGVBLTWBCJP-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- QHGVXILFMXYDRS-UHFFFAOYSA-N pyraclofos Chemical compound C1=C(OP(=O)(OCC)SCCC)C=NN1C1=CC=C(Cl)C=C1 QHGVXILFMXYDRS-UHFFFAOYSA-N 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
- H03J7/02—Automatic frequency control
- H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
- H03J7/06—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant using counters or frequency dividers
- H03J7/065—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant using counters or frequency dividers the counter or frequency divider being used in a phase locked loop
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/50—Tuning indicators; Automatic tuning control
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Television Receiver Circuits (AREA)
- Measuring Frequencies, Analyzing Spectra (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/413,769 US4485404A (en) | 1982-09-01 | 1982-09-01 | Digital aft system which is activated during vertical retrace intervals |
| US413,769 | 1982-09-01 | ||
| US06/413,762 US4484221A (en) | 1982-09-01 | 1982-09-01 | Shared counter arrangement for a digital frequency locked loop tuning system for selectively measuring the frequencies of the LO and IF signals |
| US413,762 | 1982-09-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1203330A true CA1203330A (en) | 1986-04-15 |
Family
ID=27022287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000435566A Expired CA1203330A (en) | 1982-09-01 | 1983-08-29 | Digital aft system which is activated during vertical retrace intervals |
Country Status (11)
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4503465A (en) * | 1982-11-24 | 1985-03-05 | Rca Corporation | Analog signal comparator using digital circuitry |
| JPS59106265U (ja) * | 1982-12-31 | 1984-07-17 | 日本電気ホームエレクトロニクス株式会社 | 自動微同調回路 |
| US4524387A (en) * | 1983-03-30 | 1985-06-18 | Rca Corporation | Synchronization input for television receiver on-screen alphanumeric display |
| US4601060A (en) * | 1984-10-24 | 1986-07-15 | Rca Corporation | Automatic digital fine tuning system |
| NL8801874A (nl) * | 1988-07-26 | 1990-02-16 | Philips Nv | Televisie-ontvanger met een afstemschakeling die een frequentiesyntheseschakeling bevat. |
| JPH0648778B2 (ja) * | 1989-09-29 | 1994-06-22 | 三洋電機株式会社 | 衛星放送受信装置のａｆｃ方法 |
| US5163164A (en) * | 1990-12-31 | 1992-11-10 | Thomson Consumer Electronics, Inc. | Microprocessor controlled digital aft unit |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB673770A (en) * | 1950-03-30 | 1952-06-11 | Standard Telephones Cables Ltd | Improvements in or relating to automatic frequency control arrangements for radio communication systems |
| DE2660248C2 (de) * | 1975-11-14 | 1982-06-24 | RCA Corp., 10020 New York, N.Y. | Abstimmeinrichtung für Fernsehempfänger |
| IT1073074B (it) * | 1975-11-14 | 1985-04-13 | Rca Corp | Sintetizzatore di frequenze televisive,per portanti di frequenza non standardizzata |
| FR2340909A1 (fr) * | 1976-02-10 | 1977-09-09 | Omnium Assainissement | Materiaux-supports de fermentation biologique |
| US4084127A (en) * | 1976-07-29 | 1978-04-11 | Rca Corporation | Digital frequency deviation detector useful in a television tuning system |
| JPS5580928A (en) * | 1978-12-15 | 1980-06-18 | Sony Corp | Channel selection device |
| JPS55147884A (en) * | 1979-05-07 | 1980-11-18 | Sanyo Electric Co Ltd | Aft circuit of television receiver |
| NZ193794A (en) * | 1979-05-30 | 1984-03-30 | Rca Corp | Channel identification in multiband sweep tuning system |
| JPS56782A (en) * | 1979-06-15 | 1981-01-07 | Sanyo Electric Co Ltd | Automatic tuning unit |
| US4358791A (en) * | 1980-12-01 | 1982-11-09 | Rca Corporation | Phase locked loop tuning control system including a sync activated AFT signal seeking arrangement |
| US4368540A (en) * | 1981-06-05 | 1983-01-11 | Rca Corporation | Phase locked loop tuning system including a prescaler conditioned to oscillate at an out-of-band frequency |
| US4402089A (en) * | 1981-09-16 | 1983-08-30 | Rca Corporation | Television tuning system with electronic frequency adjustment apparatus |
| JPS58111522A (ja) * | 1981-12-25 | 1983-07-02 | Sony Corp | Ａｆｔ回路 |
-
1983
- 1983-08-25 ES ES525161A patent/ES8406020A1/es not_active Expired
- 1983-08-29 CA CA000435566A patent/CA1203330A/en not_active Expired
- 1983-08-30 AU AU18544/83A patent/AU567304B2/en not_active Ceased
- 1983-08-30 IT IT22693/83A patent/IT1171083B/it active
- 1983-08-31 KR KR1019830004077A patent/KR920009011B1/ko not_active Expired
- 1983-08-31 JP JP58161183A patent/JPH0793710B2/ja not_active Expired - Lifetime
- 1983-09-01 FR FR838314040A patent/FR2541545B1/fr not_active Expired
- 1983-09-01 GB GB08323490A patent/GB2126813B/en not_active Expired
- 1983-09-01 AT AT0313583A patent/AT386713B/de not_active IP Right Cessation
- 1983-09-01 DE DE3331609A patent/DE3331609A1/de active Granted
-
1991
- 1991-08-01 HK HK592/91A patent/HK59291A/xx not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0793710B2 (ja) | 1995-10-09 |
| GB2126813A (en) | 1984-03-28 |
| DE3331609C2 (enrdf_load_html_response) | 1988-01-21 |
| GB2126813B (en) | 1986-07-23 |
| IT8322693A1 (it) | 1985-03-02 |
| AU567304B2 (en) | 1987-11-19 |
| KR840006116A (ko) | 1984-11-21 |
| GB8323490D0 (en) | 1983-10-05 |
| IT8322693A0 (it) | 1983-08-30 |
| ES525161A0 (es) | 1984-06-16 |
| DE3331609A1 (de) | 1984-03-01 |
| IT1171083B (it) | 1987-06-10 |
| FR2541545B1 (fr) | 1989-06-30 |
| KR920009011B1 (ko) | 1992-10-12 |
| ES8406020A1 (es) | 1984-06-16 |
| ATA313583A (de) | 1988-02-15 |
| JPS5964980A (ja) | 1984-04-13 |
| HK59291A (en) | 1991-08-09 |
| AU1854483A (en) | 1984-03-08 |
| FR2541545A1 (fr) | 1984-08-24 |
| AT386713B (de) | 1988-10-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1267980A (en) | Television tuning system with provisions for quickly locating active cable channels | |
| CA1050159A (en) | Wide band aft circuit for television receivers | |
| US4484221A (en) | Shared counter arrangement for a digital frequency locked loop tuning system for selectively measuring the frequencies of the LO and IF signals | |
| US4025953A (en) | Frequency synthesizer tuning system for television receivers | |
| US4485404A (en) | Digital aft system which is activated during vertical retrace intervals | |
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| US5199109A (en) | Multi channel scanning receiver with improved signal strength detecting circuitry | |
| JPS5825773A (ja) | 同期回路 | |
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| CA1203330A (en) | Digital aft system which is activated during vertical retrace intervals | |
| US4084127A (en) | Digital frequency deviation detector useful in a television tuning system | |
| US4317225A (en) | Channel identification apparatus useful in a sweep type tuning system | |
| US4009439A (en) | Programming unit for a television tuning phase locked loop | |
| US4397038A (en) | Frequency synthesizer tuning system for television receivers | |
| CA1237519A (en) | Television tuning system with aft provisions | |
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| CA1149978A (en) | Search type tuning system | |
| GB1561544A (en) | Tuning apparatus for radio frequency especially television receivers | |
| US5303398A (en) | Stability detection method and apparatus for a tuning system | |
| US4442547A (en) | Counter arrangement useful in a frequency locked loop tuning system for measuring the frequency of a local oscillator signal | |
| US4360832A (en) | Frequency synthesizer tuning system for television receivers | |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |