SE7902170L - VOTING SYSTEM FOR RECEIVING COMPOSED RADIO FREQUENCY VISION SIGNALS - Google Patents

VOTING SYSTEM FOR RECEIVING COMPOSED RADIO FREQUENCY VISION SIGNALS

Info

Publication number
SE7902170L
SE7902170L SE7902170A SE7902170A SE7902170L SE 7902170 L SE7902170 L SE 7902170L SE 7902170 A SE7902170 A SE 7902170A SE 7902170 A SE7902170 A SE 7902170A SE 7902170 L SE7902170 L SE 7902170L
Authority
SE
Sweden
Prior art keywords
frequency
local oscillator
control voltage
incremented
nonstandard
Prior art date
Application number
SE7902170A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE430200B (en
Inventor
J G N Henderson
Original Assignee
Rca Corp
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
Application filed by Rca Corp filed Critical Rca Corp
Publication of SE7902170L publication Critical patent/SE7902170L/en
Publication of SE430200B publication Critical patent/SE430200B/en

Links

Classifications

    • 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
    • H03J5/0272—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 the digital values being used to preset a counter or a frequency divider in a phase locked loop, e.g. frequency synthesizer
    • H03J5/0281—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 the digital values being used to preset a counter or a frequency divider in a phase locked loop, e.g. frequency synthesizer the digital values being held in an auxiliary non erasable memory

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Television Receiver Circuits (AREA)
  • Superheterodyne Receivers (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

RCA 68,346 TELEVISION FREQUENCY SYNTHESIZER FOR NONSTANDARD FREQUENCY CARRIERS A television receiver tuning apparatus includes a programmable phase locked loop (PLL) to synthesize local oscillator signals having frequencies appropriate to tune the receiver to standard frequency carriers respectively allocated to conventional channels. Local oscillator signals having frequencies appropriate to tune the receiver to nonstandard frequency carriers such as may be generated by a master antenna or cable television distribution system can also be provided. The PLL derives a first control voltage to control the frequency of the local oscillator signals having a range sufficient for a particular band to tune the receiver to all the channels in the band. During the reception of a nonstandard frequency carrier, a programmable divider associated with the PLL is incremented to change the local oscillator frequency in a predetermined range around the standard local oscillator frequency corresponding to the selected channel. The predetermined range is determined by the maximum expected deviation between respective nonstandard and standard frequency carriers. The frequency incremented local oscillator signal is mixed with the received signal to derive an intermediate frequency signal having a carrier incremented in a frequency range corresponding, in direct relationship, to the frequency range of the frequency incremented local oscillator signals. An automatic fine tuning (AFT) circuit including a frequency discriminator develops a discriminator signal representing the frequency deviation of the incremented intermediate frequency RCA 68,346 carrier from the standard picture carrier frequency (e.g., 45.75 MHz). The discriminator voltage is amplified to provide a second control voltage with approximately the same amplitude range as the first control voltage. When the amplitude of the second control voltage is changing in the right direction to allow AFT control and is substantially the same as the amplitude of the first control voltage for the presently selected channel, the voltage controlled local oscillator is decoupled from the first control voltage and is coupled to the second control voltage. - 1a
SE7902170A 1975-11-14 1979-03-09 VOTING SYSTEMS FOR RECEIVING COMPOUND RADIO FREQUENCY TELEVISION SIGNALS SE430200B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US63206075A 1975-11-14 1975-11-14

Publications (2)

Publication Number Publication Date
SE7902170L true SE7902170L (en) 1979-03-09
SE430200B SE430200B (en) 1983-10-24

Family

ID=24533910

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7902170A SE430200B (en) 1975-11-14 1979-03-09 VOTING SYSTEMS FOR RECEIVING COMPOUND RADIO FREQUENCY TELEVISION SIGNALS

Country Status (15)

Country Link
JP (2) JPS5828932B2 (en)
AT (1) AT377878B (en)
AU (1) AU512493B2 (en)
BE (1) BE848283A (en)
CA (1) CA1175586A (en)
DE (1) DE2651297C3 (en)
ES (1) ES453293A1 (en)
FI (1) FI66269C (en)
FR (2) FR2331917A1 (en)
GB (1) GB1561544A (en)
IT (2) IT1073074B (en)
MX (1) MX3472E (en)
NL (1) NL188065C (en)
PL (1) PL114951B1 (en)
SE (1) SE430200B (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU514310B2 (en) * 1976-05-21 1981-02-05 Rca Corp. Tuner with pll
GB1564375A (en) * 1977-09-07 1980-04-10 Marconi Co Ltd Frequency generators
JPS598966B2 (en) * 1979-04-10 1984-02-28 株式会社東芝 Television receiver control device
JPS5657324A (en) * 1979-10-16 1981-05-19 Sanyo Electric Co Ltd Digital electronic tuning system
JPS56162527A (en) * 1980-05-20 1981-12-14 Toshiba Corp Controller of television receiver
US4476580A (en) * 1980-06-17 1984-10-09 Sanyo Electric Co., Ltd. Automatic continuous tuning control apparatus for a receiver
US4521918A (en) * 1980-11-10 1985-06-04 General Electric Company Battery saving frequency synthesizer arrangement
ES8406020A1 (en) * 1982-09-01 1984-06-16 Rca Corp Digital aft system
US4503465A (en) * 1982-11-24 1985-03-05 Rca Corporation Analog signal comparator using digital circuitry
DE3852441T2 (en) * 1987-08-03 1995-06-29 Motorola Inc Automatic frequency control system.
CN102461025B (en) 2009-06-30 2014-10-22 汤姆森特许公司 Method of resending digital signals

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL166828C (en) * 1971-05-08 1981-09-15 Matsushita Electric Ind Co Ltd AUTOMATIC CHANNEL SELECTING DEVICE.
JPS4943084Y2 (en) * 1971-06-29 1974-11-26
JPS4841361A (en) * 1971-09-28 1973-06-16
JPS555729B2 (en) * 1971-11-29 1980-02-08
DE2211664A1 (en) * 1972-03-10 1973-09-20 Loewe Opta Gmbh TUNING UNIT FOR HIGH-FREQUENCY RECEIVERS
JPS5228321B2 (en) * 1972-03-15 1977-07-26
US3803494A (en) * 1972-04-07 1974-04-09 Bendix Corp Pulse tuning control system for radio receivers
DE2217002B2 (en) * 1972-04-08 1976-04-15 Blaupunkt-Werke Gmbh, 3200 Hildesheim RECEIVER FOR SINGLE-SIDED TAPE MODULATED TRANSMITTERS IN A FIXED CARRIER FREQUENCY GRID
DE2333851A1 (en) * 1973-07-03 1975-01-23 Standard Elektrik Lorenz Ag METHOD AND ARRANGEMENTS FOR THE INDEPENDENT RE-ADJUSTMENT OF THE OSCILLATOR FREQUENCY, SET WITH A TUNING ARRANGEMENT, OF AN OVERLAY RECEIVER OF A PICTURE AND / OR SOUND REPLAY ARRANGEMENT
DE2333852A1 (en) * 1973-07-03 1975-01-23 Standard Elektrik Lorenz Ag OVERLAY RECEIVER WITH A DIGITAL ADJUSTABLE VOTING ARRANGEMENT
IT1036497B (en) * 1975-07-11 1979-10-30 Indesit EMITTER SELECTOR CIRCUIT IN A SIGNAL RECEIVER

Also Published As

Publication number Publication date
IT1100758B (en) 1985-09-28
FI763252A (en) 1977-05-15
FI66269B (en) 1984-05-31
DE2651297C3 (en) 1987-04-16
BE848283A (en) 1977-03-01
MX3472E (en) 1980-12-09
GB1561544A (en) 1980-02-20
AU1958176A (en) 1978-05-18
AU512493B2 (en) 1980-10-16
CA1175586A (en) 1984-10-02
NL188065C (en) 1992-03-16
ES453293A1 (en) 1977-11-16
NL7612666A (en) 1977-05-17
DE2651297A1 (en) 1977-05-26
JPS5696523A (en) 1981-08-04
FI66269C (en) 1984-09-10
DE2651297B2 (en) 1979-03-29
JPS5829655B2 (en) 1983-06-24
FR2331917B1 (en) 1982-07-09
NL188065B (en) 1991-10-16
FR2331917A1 (en) 1977-06-10
SE430200B (en) 1983-10-24
IT7830200A0 (en) 1978-11-24
AT377878B (en) 1985-05-10
FR2495407B1 (en) 1986-01-17
PL114951B1 (en) 1981-03-31
JPS5261904A (en) 1977-05-21
IT1073074B (en) 1985-04-13
ATA848976A (en) 1984-09-15
FR2495407A1 (en) 1982-06-04
JPS5828932B2 (en) 1983-06-18

Similar Documents

Publication Publication Date Title
US5115515A (en) Method and apparatus for radio communication with improved automatic frequency control
US4685150A (en) Tuning of a resonant circuit in a communications receiver
JPS5555639A (en) Demodulation system of multiplex modulation wave
US5079525A (en) Audio-video modulator system on ic chip
SE7902170L (en) VOTING SYSTEM FOR RECEIVING COMPOSED RADIO FREQUENCY VISION SIGNALS
US4736456A (en) Tuning system for television sets
GB1480774A (en) Radio receivers
GB1359752A (en) Reception of hf electrical signals
JPS6460115A (en) Rds radio receiver
CA1041237A (en) Electronic system for automatically tuning to a selected television channel
US4339826A (en) Radio receiver having phase locked loop frequency synthesizer
US4245351A (en) AFT Arrangement for a phase locked loop tuning system
US4435618A (en) Adjacent station interference rejecting circuit
GB875909A (en) Improvements in and relating to electrical signal systems
US3509462A (en) Spurious-free phase-locked continuously tuned transceiver system
US2790072A (en) Tunable transceiver
US4172995A (en) SSB transceiver
JPS5924191Y2 (en) Synthesizer-receiver AFC circuit
US4099123A (en) Electrical multi-channel signal transmission systems
US4156252A (en) Oscillator, and method of adjusting an oscillator to a standard
GB1300636A (en) Automatic frequency control system
US3982198A (en) Oscillators
JPS5732139A (en) Receiver
CA1144603A (en) Electrical multi-channel signal transmission systems
JPS5737906A (en) Fm receiver

Legal Events

Date Code Title Description
NAL Patent in force

Ref document number: 7902170-5

Format of ref document f/p: F

NUG Patent has lapsed

Ref document number: 7902170-5

Format of ref document f/p: F