FR2421519A1 - Circuit d'accord automatique precis - Google Patents
Circuit d'accord automatique precisInfo
- Publication number
- FR2421519A1 FR2421519A1 FR7908133A FR7908133A FR2421519A1 FR 2421519 A1 FR2421519 A1 FR 2421519A1 FR 7908133 A FR7908133 A FR 7908133A FR 7908133 A FR7908133 A FR 7908133A FR 2421519 A1 FR2421519 A1 FR 2421519A1
- Authority
- FR
- France
- Prior art keywords
- intermediate frequency
- signal
- automatic tuning
- precise automatic
- circuit
- 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.)
- Granted
Links
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)
Abstract
L'invention concerne un circuit d'accord automatique précis de récepteur radio-électrique. Ce circuit comporte essentiellement un circuit accordé et un limiteur destinés à supprimer les variations d'amplitude d'un signal de fréquence intermédiaire, et un détecteur de phase qui reçoit le signal de porteuse de fréquence intermédiaire déphasé ainsi que le signal de fréquence intermédiaire ou le signal de porteuse de fréquence intermédiaire, et qui produit le signal de commande d'accord automatique précis. Quand le signal de porteuse de fréquence intermédiaire est utilisé dans le détecteur de phase, un second circuit accordé est prévu et un tampon est placé entre les deux circuits accordés. L'invention s'applique notamment à des récepteurs de télévision.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53037116A JPS6049372B2 (ja) | 1978-03-30 | 1978-03-30 | テレビジヨン受像機 |
JP53037115A JPS6013567B2 (ja) | 1978-03-30 | 1978-03-30 | テレビジヨン受像機 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2421519A1 true FR2421519A1 (fr) | 1979-10-26 |
FR2421519B1 FR2421519B1 (fr) | 1986-03-07 |
Family
ID=26376208
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7908133A Expired FR2421519B1 (fr) | 1978-03-30 | 1979-03-30 | Circuit d'accord automatique precis |
Country Status (8)
Country | Link |
---|---|
US (1) | US4283792A (fr) |
JP (2) | JPS6013567B2 (fr) |
AU (1) | AU522233B2 (fr) |
CA (1) | CA1122660A (fr) |
DE (1) | DE2912756A1 (fr) |
FR (1) | FR2421519B1 (fr) |
GB (2) | GB2021883B (fr) |
NL (1) | NL190795C (fr) |
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 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3842198A (en) * | 1973-09-07 | 1974-10-15 | Warwick Electronics Inc | Sound demodulator and afc system |
FR2239830A1 (fr) * | 1973-08-03 | 1975-02-28 | Philips Nv | |
US3922483A (en) * | 1973-04-10 | 1975-11-25 | Thorn Electrical Ind Ltd | Tunable television receiver circuits with automatic phase control |
US4091421A (en) * | 1977-04-28 | 1978-05-23 | Zenith Radio Corporation | Television AFC system having complementary sound and picture carrier control effects |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3548326A (en) * | 1967-07-31 | 1970-12-15 | Sprague Electric Co | Direct coupled limiter-discriminator circuit |
-
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/fr 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 FR FR7908133A patent/FR2421519B1/fr not_active Expired
- 1979-03-30 NL NL7902494A patent/NL190795C/xx not_active IP Right Cessation
- 1979-03-30 DE DE19792912756 patent/DE2912756A1/de active Granted
- 1979-03-30 AU AU45628/79A patent/AU522233B2/en not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3922483A (en) * | 1973-04-10 | 1975-11-25 | Thorn Electrical Ind Ltd | Tunable television receiver circuits with automatic phase control |
FR2239830A1 (fr) * | 1973-08-03 | 1975-02-28 | Philips Nv | |
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 |
Also Published As
Publication number | Publication date |
---|---|
JPS6049372B2 (ja) | 1985-11-01 |
NL190795B (nl) | 1994-03-16 |
JPS6013567B2 (ja) | 1985-04-08 |
AU522233B2 (en) | 1982-05-20 |
GB2021883A (en) | 1979-12-05 |
JPS54128612A (en) | 1979-10-05 |
DE2912756C2 (fr) | 1989-04-06 |
NL190795C (nl) | 1994-08-16 |
JPS54128611A (en) | 1979-10-05 |
FR2421519B1 (fr) | 1986-03-07 |
NL7902494A (nl) | 1979-10-02 |
US4283792A (en) | 1981-08-11 |
GB2103036A (en) | 1983-02-09 |
AU4562879A (en) | 1979-10-04 |
GB2103036B (en) | 1983-06-08 |
GB2021883B (en) | 1983-03-16 |
CA1122660A (fr) | 1982-04-27 |
DE2912756A1 (de) | 1979-11-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |