FR2420247A1 - Dispositif d'affichage de - Google Patents
Dispositif d'affichage deInfo
- Publication number
- FR2420247A1 FR2420247A1 FR7906299A FR7906299A FR2420247A1 FR 2420247 A1 FR2420247 A1 FR 2420247A1 FR 7906299 A FR7906299 A FR 7906299A FR 7906299 A FR7906299 A FR 7906299A FR 2420247 A1 FR2420247 A1 FR 2420247A1
- Authority
- FR
- France
- Prior art keywords
- frequency
- counter
- display device
- intermediate frequency
- receivers
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
- G01R23/10—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage by converting frequency into a train of pulses, which are then counted, i.e. converting the signal into a square wave
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
- H03J1/02—Indicating arrangements
- H03J1/04—Indicating arrangements with optical indicating means
- H03J1/045—Indication of the tuning band, the bandwidth, tone control, the channel number, the frequency, or the like
- H03J1/047—Indication of the tuning band, the bandwidth, tone control, the channel number, the frequency, or the like using electronic means, e.g. LED's
- H03J1/048—Indication of the tuning band, the bandwidth, tone control, the channel number, the frequency, or the like using electronic means, e.g. LED's with digital indication
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J3/00—Continuous tuning
- H03J3/02—Details
- H03J3/12—Electrically-operated arrangements for indicating correct tuning
- H03J3/14—Visual indication, e.g. magic eye
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Circuits Of Receivers In General (AREA)
- Superheterodyne Receivers (AREA)
Abstract
L'invention concerne les récepteurs radiophoniques. Un dispositif d'affichage de la fréquence reçue par un récepteur radiophonique comprend essentiellement un compteur 21 qui compte la fréquence de l'oscillateur local et qui attaque un indicateur visuel 25 par l'intermédiaire d'un décodeur 24. Le compteur est prépositionné par un circuit 22 de façon à comger automatiquement l'écart entre la fréquence intermédiaire réelle et la fréquence intermédiaire nominale Application aux récepteurs de radiodiffusion.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2969378A JPS5823020B2 (ja) | 1978-03-13 | 1978-03-13 | ラジオ受信機の受信周波数表示回路 |
JP3316478U JPS5822349Y2 (ja) | 1978-03-13 | 1978-03-13 | 受信機の受信周波数表示回路 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2420247A1 true FR2420247A1 (fr) | 1979-10-12 |
FR2420247B1 FR2420247B1 (fr) | 1986-03-21 |
Family
ID=26367929
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7906299A Expired FR2420247B1 (fr) | 1978-03-13 | 1979-03-12 | Dispositif d'affichage de |
Country Status (4)
Country | Link |
---|---|
US (1) | US4247950A (fr) |
DE (1) | DE2909784C2 (fr) |
FR (1) | FR2420247B1 (fr) |
NL (1) | NL179174C (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0252272A2 (fr) * | 1986-06-04 | 1988-01-13 | Blaupunkt-Werke GmbH | Récepteur haute fréquence avec indication numérique de la fréquence de réception |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3244983A (en) * | 1963-03-06 | 1966-04-05 | Gen Dynamics Corp | Continuously tunable direct reading high frequency converter |
DE1466222A1 (de) * | 1965-10-20 | 1969-06-12 | Plath Naut Elektron Tech | Verfahren zur Erhoehung der Einstellgenauigkeit eines UEberlagerungsempfaengers mit digitaler Anzeige |
US3753119A (en) * | 1971-04-07 | 1973-08-14 | Magnavox Co | Digital tuning indicator |
US3758853A (en) * | 1972-03-20 | 1973-09-11 | Heath Co | Method of and apparatus for determining a tuned frequency |
US4024477A (en) * | 1974-05-17 | 1977-05-17 | Nippon Soken, Inc. | Received signal frequency indicating system |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2217210C3 (de) * | 1972-04-10 | 1978-10-12 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Überlagerungsempfänger mit digitaler Anzeige der Empfangsfrequenz |
US4163943A (en) * | 1976-06-14 | 1979-08-07 | Matsushita Electric Industrial Co., Ltd. | Radio receiver employing premixing and digital display |
-
1979
- 1979-03-02 US US06/017,061 patent/US4247950A/en not_active Expired - Lifetime
- 1979-03-12 FR FR7906299A patent/FR2420247B1/fr not_active Expired
- 1979-03-12 NL NLAANVRAGE7901954,A patent/NL179174C/xx not_active IP Right Cessation
- 1979-03-13 DE DE2909784A patent/DE2909784C2/de not_active Expired
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3244983A (en) * | 1963-03-06 | 1966-04-05 | Gen Dynamics Corp | Continuously tunable direct reading high frequency converter |
DE1466222A1 (de) * | 1965-10-20 | 1969-06-12 | Plath Naut Elektron Tech | Verfahren zur Erhoehung der Einstellgenauigkeit eines UEberlagerungsempfaengers mit digitaler Anzeige |
US3753119A (en) * | 1971-04-07 | 1973-08-14 | Magnavox Co | Digital tuning indicator |
US3758853A (en) * | 1972-03-20 | 1973-09-11 | Heath Co | Method of and apparatus for determining a tuned frequency |
US4024477A (en) * | 1974-05-17 | 1977-05-17 | Nippon Soken, Inc. | Received signal frequency indicating system |
Non-Patent Citations (2)
Title |
---|
NV202/76 * |
NV8087/79 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0252272A2 (fr) * | 1986-06-04 | 1988-01-13 | Blaupunkt-Werke GmbH | Récepteur haute fréquence avec indication numérique de la fréquence de réception |
EP0252272A3 (en) * | 1986-06-04 | 1989-01-11 | Blaupunkt-Werke Gmbh | High-frequency receiver with a digital indication of the reception frequency |
Also Published As
Publication number | Publication date |
---|---|
NL7901954A (nl) | 1979-09-17 |
DE2909784A1 (de) | 1979-09-20 |
NL179174B (nl) | 1986-02-17 |
DE2909784C2 (de) | 1983-09-29 |
FR2420247B1 (fr) | 1986-03-21 |
US4247950A (en) | 1981-01-27 |
NL179174C (nl) | 1986-07-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TP | Transmission of property |