CA1203330A - Digital aft system which is activated during vertical retrace intervals - Google Patents

Digital aft system which is activated during vertical retrace intervals

Info

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
Application number
CA000435566A
Other languages
English (en)
French (fr)
Inventor
Juri Tults
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RCA Corp
Original Assignee
RCA Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US06/413,769 external-priority patent/US4485404A/en
Priority claimed from US06/413,762 external-priority patent/US4484221A/en
Application filed by RCA Corp filed Critical RCA Corp
Application granted granted Critical
Publication of CA1203330A publication Critical patent/CA1203330A/en
Expired legal-status Critical Current

Links

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)
CA000435566A 1982-09-01 1983-08-29 Digital aft system which is activated during vertical retrace intervals Expired CA1203330A (en)

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)

Country Link
JP (1) JPH0793710B2 (de)
KR (1) KR920009011B1 (de)
AT (1) AT386713B (de)
AU (1) AU567304B2 (de)
CA (1) CA1203330A (de)
DE (1) DE3331609A1 (de)
ES (1) ES8406020A1 (de)
FR (1) FR2541545B1 (de)
GB (1) GB2126813B (de)
HK (1) HK59291A (de)
IT (1) IT1171083B (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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
IT1073074B (it) * 1975-11-14 1985-04-13 Rca Corp Sintetizzatore di frequenze televisive,per portanti di frequenza non standardizzata
DE2660248C2 (de) * 1975-11-14 1982-06-24 RCA Corp., 10020 New York, N.Y. Abstimmeinrichtung für Fernsehempfänger
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

Also Published As

Publication number Publication date
ATA313583A (de) 1988-02-15
KR920009011B1 (ko) 1992-10-12
ES525161A0 (es) 1984-06-16
IT1171083B (it) 1987-06-10
DE3331609C2 (de) 1988-01-21
IT8322693A1 (it) 1985-03-02
ES8406020A1 (es) 1984-06-16
IT8322693A0 (it) 1983-08-30
JPH0793710B2 (ja) 1995-10-09
DE3331609A1 (de) 1984-03-01
HK59291A (en) 1991-08-09
FR2541545B1 (fr) 1989-06-30
GB2126813A (en) 1984-03-28
AU1854483A (en) 1984-03-08
JPS5964980A (ja) 1984-04-13
AU567304B2 (en) 1987-11-19
GB8323490D0 (en) 1983-10-05
KR840006116A (ko) 1984-11-21
GB2126813B (en) 1986-07-23
AT386713B (de) 1988-10-10
FR2541545A1 (fr) 1984-08-24

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Legal Events

Date Code Title Description
MKEX Expiry