GB1064448A – Automatic frequency control and station searching arrangement
– Google Patents
GB1064448A – Automatic frequency control and station searching arrangement
– Google Patents
Automatic frequency control and station searching arrangement
Info
Publication number
GB1064448A
GB1064448A
GB19891/64A
GB1989164A
GB1064448A
GB 1064448 A
GB1064448 A
GB 1064448A
GB 19891/64 A
GB19891/64 A
GB 19891/64A
GB 1989164 A
GB1989164 A
GB 1989164A
GB 1064448 A
GB1064448 A
GB 1064448A
Authority
GB
United Kingdom
Prior art keywords
tuning
capacitor
voltage
receiver
range
Prior art date
1963-05-14
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
GB19891/64A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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.)
1963-05-14
Filing date
1964-05-13
Publication date
1967-04-05
1964-05-13
Application filed by Standard Telephone and Cables PLC
filed
Critical
Standard Telephone and Cables PLC
1967-04-05
Publication of GB1064448A
publication
Critical
patent/GB1064448A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
H03J7/24—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element using varactors, i.e. voltage variable reactive diodes
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
H03J3/00—Continuous tuning
Abstract
1,064,448. Automatic tuning arrangements. STANDARD TELEPHONES & CABLES Ltd. May 13, 1964 [May 14, 1963], No. 19891/64. Heading H3Q. In a signal-seeking, self-tuning receiver, tuning is effected by voltage-variable capacitors 8, 9, controlled by the voltage across a capacitor 11, arranged to be charged and discharged so as to sweep the receiver over its tuning range. As shown, the input and local oscillator circuits of a transistorized radio receiver are respectively tuned by variable capacitance diodes 8, 9 controlled by the voltage across capacitor 11. The tuning may be set to the high frequency end of the range by closing switch 10, charging capacitor 11. Switch 12 is then closed, enabling tuning to be swept over the range by the discharge of capacitor 11 via switching transistor 7. When the receiver is tuned to a signal, the voltage from the frequency discriminator 4 acts on a relaxation stage 6 in such a way as to open the switching transistor 7 so that the sweep is arrested, the tuning being maintained by repetitive charging and dsicharging of capacitor 11 so that the tuning oscillates over a small range at the centre of the characteristic of discriminator 4. The tuning may be swept to further channels by closing switch 12. The negative output of discriminator 4 is by-passed by diode 17, a filter 15, 16 preventing false operation due to noise.
GB19891/64A
1963-05-14
1964-05-13
Automatic frequency control and station searching arrangement
Expired
GB1064448A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
DEG37742A
DE1184816B
(en)
1963-05-14
1963-05-14
Automatic station search
Publications (1)
Publication Number
Publication Date
GB1064448A
true
GB1064448A
(en)
1967-04-05
Family
ID=7125707
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB19891/64A
Expired
GB1064448A
(en)
1963-05-14
1964-05-13
Automatic frequency control and station searching arrangement
Country Status (6)
Country
Link
US
(1)
US3384826A
(en)
BE
(1)
BE647906A
(en)
CH
(1)
CH416758A
(en)
DE
(1)
DE1184816B
(en)
GB
(1)
GB1064448A
(en)
NL
(1)
NL6405404A
(en)
Families Citing this family (9)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3519939A
(en)
*
1965-09-21
1970-07-07
Matsushita Electric Ind Co Ltd
Automatic tuning receiver with detuning means
DE1293250B
(en)
*
1966-08-05
1969-04-24
Fujitsu Ltd Comm And Electroni
Automatic tuning device for a resonance circuit
US3440544A
(en)
*
1966-11-01
1969-04-22
Motorola Inc
Manual,automatic,and semiautomatic tuning circuits utilizing voltage variable capacitance diodes
DE1298155B
(en)
*
1967-08-04
1969-06-26
Telefunken Patent
Automatic station search and tuning for receivers in communications engineering
DE1281501B
(en)
*
1967-08-31
1968-10-31
Blaupunkt Werke Gmbh
Overlay receiver with an electronic automatic station search
US3571724A
(en)
*
1968-05-31
1971-03-23
Admiral Corp
Electrically tunable signal seeking tuner
US3631349A
(en)
*
1970-03-09
1971-12-28
Sylvania Electric Prod
Automatic signal-seeking circuitry
JPS51206A
(en)
*
1974-06-18
1976-01-05
Torio Kk
Shingohanbetsuhoho oyobi sonosochi
US7167697B2
(en)
*
2003-11-03
2007-01-23
Oneworld Enterprises Limited
Reverse electronic tuning circuit for FM radio frequency-lock-loop circuits
Family Cites Families (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE1171032B
(en)
*
1961-11-13
1964-05-27
Telefunken Patent
Arrangement for electronic voting and automatic sharpening
US3153194A
(en)
*
1962-07-13
1964-10-13
Hallicrafters Co
Common oscillator transceiver with independent receiver tone control means
1963
1963-05-14
DE
DEG37742A
patent/DE1184816B/en
active
Pending
1964
1964-05-12
US
US366814A
patent/US3384826A/en
not_active
Expired – Lifetime
1964-05-13
GB
GB19891/64A
patent/GB1064448A/en
not_active
Expired
1964-05-14
NL
NL6405404A
patent/NL6405404A/xx
unknown
1964-05-14
BE
BE647906D
patent/BE647906A/xx
unknown
1964-05-14
CH
CH632064A
patent/CH416758A/en
unknown
Also Published As
Publication number
Publication date
DE1184816B
(en)
1965-01-07
NL6405404A
(en)
1964-11-16
US3384826A
(en)
1968-05-21
CH416758A
(en)
1966-07-15
BE647906A
(en)
1964-11-16
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