CA1122660A - Automatic fine tuning circuit - Google Patents
Automatic fine tuning circuitInfo
- Publication number
- CA1122660A CA1122660A CA324,337A CA324337A CA1122660A CA 1122660 A CA1122660 A CA 1122660A CA 324337 A CA324337 A CA 324337A CA 1122660 A CA1122660 A CA 1122660A
- Authority
- CA
- Canada
- Prior art keywords
- intermediate frequency
- signal
- phase
- frequency
- carrier signal
- 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
- 230000003993 interaction Effects 0.000 claims abstract description 9
- 239000000543 intermediate Substances 0.000 claims description 94
- 239000003990 capacitor Substances 0.000 claims description 9
- 230000004044 response Effects 0.000 claims description 5
- 230000003139 buffering effect Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 9
- 238000001514 detection method Methods 0.000 description 6
- 230000010363 phase shift Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 206010013710 Drug interaction Diseases 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
- H03D3/02—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal
- H03D3/18—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal by means of synchronous gating arrangements
- H03D3/20—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal by means of synchronous gating arrangements producing pulses whose amplitude or duration depends on phase difference
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D1/00—Demodulation of amplitude-modulated oscillations
- H03D1/22—Homodyne or synchrodyne circuits
- H03D1/2245—Homodyne or synchrodyne circuits using two quadrature channels
- H03D1/2254—Homodyne or synchrodyne circuits using two quadrature channels and a phase locked loop
-
- 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
-
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D13/00—Circuits for comparing the phase or frequency of two mutually-independent oscillations
- H03D13/007—Circuits for comparing the phase or frequency of two mutually-independent oscillations by analog multiplication of the oscillations or by performing a similar analog operation on the oscillations
- H03D13/008—Circuits for comparing the phase or frequency of two mutually-independent oscillations by analog multiplication of the oscillations or by performing a similar analog operation on the oscillations using transistors
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
- H03D2200/0001—Circuit elements of demodulators
- H03D2200/0009—Emitter or source coupled transistor pairs or long tail pairs
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
- H03D2200/0041—Functional aspects of demodulators
- H03D2200/0049—Analog multiplication for detection
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
- H03D2200/0041—Functional aspects of demodulators
- H03D2200/0082—Quadrature arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Receiver Circuits (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Superheterodyne Receivers (AREA)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP37115/78 | 1978-03-30 | ||
| JP53037115A JPS6013567B2 (ja) | 1978-03-30 | 1978-03-30 | テレビジヨン受像機 |
| JP37116/78 | 1978-03-30 | ||
| JP53037116A JPS6049372B2 (ja) | 1978-03-30 | 1978-03-30 | テレビジヨン受像機 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1122660A true CA1122660A (en) | 1982-04-27 |
Family
ID=26376208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA324,337A Expired CA1122660A (en) | 1978-03-30 | 1979-03-28 | Automatic fine tuning circuit |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4283792A (en, 2012) |
| JP (2) | JPS6013567B2 (en, 2012) |
| AU (1) | AU522233B2 (en, 2012) |
| CA (1) | CA1122660A (en, 2012) |
| DE (1) | DE2912756A1 (en, 2012) |
| FR (1) | FR2421519B1 (en, 2012) |
| GB (2) | GB2021883B (en, 2012) |
| NL (1) | NL190795C (en, 2012) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL184594C (nl) * | 1979-09-04 | 1989-09-01 | Philips Nv | Radio-ontvanger voorzien van een frequentie gesleutelde lus met audiofrequente terugkoppeling, en een stomschakeling. |
| JPS56147571A (en) * | 1980-04-18 | 1981-11-16 | Hitachi Ltd | Pseudo synchronism detection circuit |
| JPS5720072A (en) * | 1980-07-10 | 1982-02-02 | Sony Corp | Television receiver |
| US4367491A (en) * | 1981-06-03 | 1983-01-04 | Rca Corporation | Video signal recovery system |
| JPS59140736A (ja) * | 1983-01-31 | 1984-08-13 | Nec Corp | 光ヘテロダイン検波パルス受信方法 |
| US4660088A (en) * | 1983-11-29 | 1987-04-21 | Rca Corporation | Quasi-parallel television if suitable for stereo sound reception |
| JPS6182586A (ja) * | 1984-09-29 | 1986-04-26 | Toshiba Corp | 同期検波回路 |
| JPS61171207A (ja) * | 1985-01-25 | 1986-08-01 | Nec Corp | 受信機 |
| FR2649845B1 (fr) * | 1989-07-12 | 1994-05-13 | Alcatel Transmission Faisceaux H | Dispositif de reception pour faisceau hertzien numerique |
| DE4318276A1 (de) * | 1993-06-03 | 1994-12-08 | Thomson Brandt Gmbh | Fernsehtuner für terrestrischen Empfang und Satellitenempfang |
| KR0176631B1 (ko) * | 1994-07-13 | 1999-05-01 | 김광호 | 자동 미세 조정회로 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3548326A (en) * | 1967-07-31 | 1970-12-15 | Sprague Electric Co | Direct coupled limiter-discriminator circuit |
| GB1440342A (en) * | 1973-04-10 | 1976-06-23 | Thorn Electrical Ind Ltd | Television receiver circuits |
| NL173342C (nl) * | 1973-08-03 | 1984-06-18 | Philips Nv | Televisieontvanger met een automatische afstemcorrectieschakeling. |
| US3842198A (en) * | 1973-09-07 | 1974-10-15 | Warwick Electronics Inc | Sound demodulator and afc system |
| US4091421A (en) * | 1977-04-28 | 1978-05-23 | Zenith Radio Corporation | Television AFC system having complementary sound and picture carrier control effects |
-
1978
- 1978-03-30 JP JP53037115A patent/JPS6013567B2/ja not_active Expired
- 1978-03-30 JP JP53037116A patent/JPS6049372B2/ja not_active Expired
-
1979
- 1979-03-28 CA CA324,337A patent/CA1122660A/en not_active Expired
- 1979-03-29 GB GB7911017A patent/GB2021883B/en not_active Expired
- 1979-03-29 GB GB08209920A patent/GB2103036B/en not_active Expired
- 1979-03-29 US US06/025,034 patent/US4283792A/en not_active Expired - Lifetime
- 1979-03-30 DE DE19792912756 patent/DE2912756A1/de active Granted
- 1979-03-30 NL NL7902494A patent/NL190795C/xx not_active IP Right Cessation
- 1979-03-30 FR FR7908133A patent/FR2421519B1/fr not_active Expired
- 1979-03-30 AU AU45628/79A patent/AU522233B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2421519B1 (fr) | 1986-03-07 |
| NL190795C (nl) | 1994-08-16 |
| DE2912756A1 (de) | 1979-11-15 |
| JPS6049372B2 (ja) | 1985-11-01 |
| NL190795B (nl) | 1994-03-16 |
| GB2103036A (en) | 1983-02-09 |
| GB2103036B (en) | 1983-06-08 |
| GB2021883B (en) | 1983-03-16 |
| FR2421519A1 (fr) | 1979-10-26 |
| JPS54128611A (en) | 1979-10-05 |
| JPS54128612A (en) | 1979-10-05 |
| AU522233B2 (en) | 1982-05-20 |
| US4283792A (en) | 1981-08-11 |
| AU4562879A (en) | 1979-10-04 |
| NL7902494A (nl) | 1979-10-02 |
| JPS6013567B2 (ja) | 1985-04-08 |
| DE2912756C2 (en, 2012) | 1989-04-06 |
| GB2021883A (en) | 1979-12-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |