GB1395768A - Automatic tuning apparatus - Google Patents

Automatic tuning apparatus

Info

Publication number
GB1395768A
GB1395768A GB2116872A GB2116872A GB1395768A GB 1395768 A GB1395768 A GB 1395768A GB 2116872 A GB2116872 A GB 2116872A GB 2116872 A GB2116872 A GB 2116872A GB 1395768 A GB1395768 A GB 1395768A
Authority
GB
United Kingdom
Prior art keywords
frequency
sweep
circuit
sweeping
channel
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
GB2116872A
Other languages
English (en)
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 JP3063971A external-priority patent/JPS5148605B1/ja
Priority claimed from JP3063671A external-priority patent/JPS5148604B1/ja
Priority claimed from JP3063871A external-priority patent/JPS5214922B1/ja
Priority claimed from JP3064071A external-priority patent/JPS5213363B1/ja
Priority claimed from JP3063771A external-priority patent/JPS5213362B1/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of GB1395768A publication Critical patent/GB1395768A/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
    • H03J7/18—Automatic scanning over a band of frequencies
    • H03J7/20—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element
    • H03J7/28—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element using counters or frequency dividers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/02—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
    • H03J5/0245—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
GB2116872A 1971-05-08 1972-05-05 Automatic tuning apparatus Expired GB1395768A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP3063971A JPS5148605B1 (US06174465-20010116-C00003.png) 1971-05-08 1971-05-08
JP3063671A JPS5148604B1 (US06174465-20010116-C00003.png) 1971-05-08 1971-05-08
JP3063871A JPS5214922B1 (US06174465-20010116-C00003.png) 1971-05-08 1971-05-08
JP3064071A JPS5213363B1 (US06174465-20010116-C00003.png) 1971-05-08 1971-05-08
JP3063771A JPS5213362B1 (US06174465-20010116-C00003.png) 1971-05-08 1971-05-08

Publications (1)

Publication Number Publication Date
GB1395768A true GB1395768A (en) 1975-05-29

Family

ID=27521251

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2116872A Expired GB1395768A (en) 1971-05-08 1972-05-05 Automatic tuning apparatus

Country Status (6)

Country Link
US (1) US3818353A (US06174465-20010116-C00003.png)
CA (1) CA990813A (US06174465-20010116-C00003.png)
DE (1) DE2222523C3 (US06174465-20010116-C00003.png)
FR (1) FR2137633B1 (US06174465-20010116-C00003.png)
GB (1) GB1395768A (US06174465-20010116-C00003.png)
NL (1) NL166828C (US06174465-20010116-C00003.png)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7306381A (US06174465-20010116-C00003.png) * 1973-05-08 1974-11-12
DE2330739C2 (de) * 1973-06-16 1982-03-04 Philips Patentverwaltung Gmbh, 2000 Hamburg Bedienungseinrichtung für ein Fernsehempfangsgerät
US3978411A (en) * 1973-11-30 1976-08-31 Matsushita Electric Industrial Co., Ltd. Sweep output generator having a frequency modulated local oscillator for the station selector of a television receiver
US3931579A (en) * 1974-04-01 1976-01-06 Zenith Radio Corporation Digital signal seeking tuning system
US3961263A (en) * 1974-06-03 1976-06-01 Rca Corporation Bandstart detector system for a television tuning system
US3980959A (en) * 1974-06-03 1976-09-14 Rca Corporation Tuner bandswitching system for a television tuning system
US3958180A (en) * 1974-06-03 1976-05-18 Rca Corporation Varactor tuner frequency controller
US4020419A (en) * 1974-06-05 1977-04-26 The Magnavox Company Electronic system for automatically tuning to a selected television channel
US3956702A (en) * 1974-07-01 1976-05-11 Zenith Radio Corporation Band decoder for all-channel digital tuning system
US3980958A (en) * 1974-07-29 1976-09-14 Zenith Radio Corporation Signal seeking tuning system with illegal channel detection means
US3971991A (en) * 1974-09-04 1976-07-27 Zenith Radio Corporation Television tuning system with varactor malfunction detection
US3943449A (en) * 1974-09-09 1976-03-09 Zenith Radio Corporation Multi-speed ramp for a varactor tuning system
US3968444A (en) * 1974-11-11 1976-07-06 Texas Instruments Incorporated Skip band tuner
DE2558416C2 (de) * 1974-12-24 1985-05-23 Fujitsu Ten Ltd., Kobe, Hyogo Rundfunkempfänger
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
JPS5826693B2 (ja) * 1975-11-22 1983-06-04 ソニー株式会社 センキヨクソウチ
IT1064110B (it) * 1976-03-09 1985-02-18 Voxson Spa Sistema di sintonia elettronica con memorizzazione digitale delle stazioni radio emittenti
JPS5944805B2 (ja) * 1977-08-26 1984-11-01 株式会社日立製作所 自動選局装置
JP4690019B2 (ja) * 2004-11-18 2011-06-01 リーダー電子株式会社 チャンネル検出装置およびこれを備えたチューナ検査装置
KR100765319B1 (ko) * 2005-09-13 2007-10-09 삼성전자주식회사 방송 시스템의 채널 탐색 방법 및 그 장치
TWI277278B (en) * 2005-09-23 2007-03-21 Delta Electronics Inc High-voltage detecting circuit for saving power in standby mode
CN112633022B (zh) * 2020-12-04 2023-06-27 北京信息科技大学 一种射频标签安检机

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3611152A (en) * 1967-07-25 1971-10-05 Matsushita Electric Ind Co Ltd Stabilized automatic tuning receiver

Also Published As

Publication number Publication date
DE2222523A1 (de) 1973-01-25
FR2137633A1 (US06174465-20010116-C00003.png) 1972-12-29
CA990813A (en) 1976-06-08
US3818353A (en) 1974-06-18
FR2137633B1 (US06174465-20010116-C00003.png) 1976-08-06
AU4198672A (en) 1973-11-08
NL166828B (nl) 1981-04-15
DE2222523B2 (US06174465-20010116-C00003.png) 1973-10-11
NL166828C (nl) 1981-09-15
NL7206006A (US06174465-20010116-C00003.png) 1972-11-10
DE2222523C3 (de) 1974-05-09

Similar Documents

Publication Publication Date Title
GB1395768A (en) Automatic tuning apparatus
US3882400A (en) Broadcast receiver
US3845394A (en) Broadcast receiver
US3736513A (en) Receiver tuning system
US4408349A (en) Receiver provided with a frequency synthesizer capable of storing fine tuning information
CA1078462A (en) Multiple-band digital frequency synthesizer receiver
US4422096A (en) Television frequency synthesizer for nonstandard frequency carriers
US4241450A (en) Automatic turn-off apparatus for a radio or television receiver
US4291414A (en) Radio receiver operable in station search mode or station select mode
US3942121A (en) Digital tuning method and system
CA1049165A (en) Electronic automatic frequency tuning system
FI66269B (fi) Anordning foer avstaemning av en mottagare till en radiofrekvent baervaog
CA1149978A (en) Search type tuning system
CA1041237A (en) Electronic system for automatically tuning to a selected television channel
US3714580A (en) Electronic search tuning system
US4245351A (en) AFT Arrangement for a phase locked loop tuning system
GB1389071A (en) Electrical channel selscting devices
US3824474A (en) Automatic frequency control device
US4159487A (en) Low cost memory station
US3753172A (en) Varactor tuning system having means to maintain terminal voltage of varactor biasing capacitor within desired range
US3913029A (en) Electronic automatic frequency tuning system
US4208741A (en) AFC System for a synthesizer tuning system
US4249259A (en) Digital channel selection apparatus
US3750030A (en) Frequency switching circuitry for varactor tuned radio receivers
GB1590444A (en) Phase locked loop tuning system with preset tuning

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
746 Register noted 'licences of right' (sect. 46/1977)
PE20 Patent expired after termination of 20 years