GB1342052A - Multi-carrier transmisssion system - Google Patents

Multi-carrier transmisssion system

Info

Publication number
GB1342052A
GB1342052A GB5575770A GB5575770A GB1342052A GB 1342052 A GB1342052 A GB 1342052A GB 5575770 A GB5575770 A GB 5575770A GB 5575770 A GB5575770 A GB 5575770A GB 1342052 A GB1342052 A GB 1342052A
Authority
GB
United Kingdom
Prior art keywords
frequency
signals
signal
television
fed
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
GB5575770A
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.)
SPENCER KENNEDY LAB Inc
Original Assignee
SPENCER KENNEDY LAB Inc
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 SPENCER KENNEDY LAB Inc filed Critical SPENCER KENNEDY LAB Inc
Publication of GB1342052A publication Critical patent/GB1342052A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/12—Arrangements for reducing cross-talk between channels
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
    • H03B5/1203—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the amplifier being a single transistor
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
    • H03B5/1231—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the amplifier comprising one or more bipolar transistors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
    • H03B5/1237—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator
    • H03B5/124—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator the means comprising a voltage dependent capacitance
    • H03B5/1243—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator the means comprising a voltage dependent capacitance the means comprising voltage variable capacitance diodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/16—Multiple-frequency-changing
    • H03D7/161—Multiple-frequency-changing all the frequency changers being connected in cascade
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/12—Transference of modulation from one carrier to another, e.g. frequency-changing by means of semiconductor devices having more than two electrodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Details Of Television Systems (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

1342052 Television distribution; radio receiving apparatus SPENCER-KENNEDY LABORATORIES Inc 24 Nov 1970 [28 Nov 1969] 55757/70 Headings H3Q and H4R A converter for selecting any one of a number of television signals on a transmission path comprises a broad band input circuit for coupling to the path and translating the signals to a higher frequency, a narrow band circuit for selecting a predetermined one of the signals and means for translating that signal to the frequency of a predetermined television channel. As described the signals on the transmisson path are each on carriers of a frequency which is a different odd multiple of a reference frequency, e.g. 4À75 MHz. The signals are fed via a broad band amplifying stage Q1, Figs. 6 and 7, to a mixer stage Q2 fed with a signal from the voltage controlled oscillator Q to translate the required television channel to an intermediate frequency, e.g. 230 MHz, a three stage band pass filter including inductors L5 to L9 and capacitors C14-C16 feeds the intermediate frequency signal via tuned amplifier Q to a mixer Q5 fed with a signal from oscillator Q6 whose frequency is such as to shift the intermediate frequency to the frequency of an unused channel in a standard television set 1.
GB5575770A 1969-11-28 1970-11-24 Multi-carrier transmisssion system Expired GB1342052A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US88083969A 1969-11-28 1969-11-28

Publications (1)

Publication Number Publication Date
GB1342052A true GB1342052A (en) 1973-12-25

Family

ID=25377221

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5575770A Expired GB1342052A (en) 1969-11-28 1970-11-24 Multi-carrier transmisssion system

Country Status (2)

Country Link
US (1) US3639840A (en)
GB (1) GB1342052A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2191370A (en) * 1986-06-04 1987-12-09 British Telecomm Cable television distribution system

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3798548A (en) * 1971-09-08 1974-03-19 Ameco Inc Discrete cable television distribution system
US3898566A (en) * 1972-10-02 1975-08-05 Phasecom Corp Method and apparatus for reducing distortion in multicarrier communication systems
US3935534A (en) * 1972-11-15 1976-01-27 Columbia Pictures Industries, Inc. Converter-tuner for information transmission system
US3882266A (en) * 1973-01-11 1975-05-06 Oak Industries Inc Apparatus for converting selected channels
DE2334570B1 (en) * 1973-07-07 1975-03-06 Philips Patentverwaltung Tunable radio frequency input circuitry for a television receiver
NL7405405A (en) * 1974-04-22 1975-10-24 Philips Nv TELEVISION DISTRIBUTION SYSTEM.
US3942120A (en) * 1974-07-22 1976-03-02 Texas Instruments Incorporated SWD FM receiver circuit
US4077006A (en) * 1975-03-14 1978-02-28 Victor Nicholson Bidirectional unicable switching system
USRE31639E (en) * 1975-03-14 1984-07-31 Bidirectional unicable switching system
US4200839A (en) * 1975-10-29 1980-04-29 Gargini Eric J Wired television broadcasting systems
JPS5823978B2 (en) * 1975-11-11 1983-05-18 ソニー株式会社 Chuyuna
JPS5826699B2 (en) * 1975-11-13 1983-06-04 ソニー株式会社 Chuyuna
JPS5399811A (en) * 1977-02-14 1978-08-31 Torio Kk Double superheterodyne system fm receiver
US4408347A (en) * 1977-07-29 1983-10-04 Texas Instruments Incorporated High-frequency channel selector having fixed bandpass filters in the RF section
CA1173176A (en) * 1979-06-04 1984-08-21 Isao Fujimoto Tuner apparatus
FR2482388A1 (en) * 1980-05-08 1981-11-13 Visiodis Channel selector for cable TV redistribution system - has two local intermediate frequency oscillators controlled by PLL operated by single quartz clock
FR2487149B1 (en) * 1980-07-18 1985-09-20 Visiodis TELEVISION SIGNAL DISTRIBUTION EQUIPMENT WITH INCORPORATED STABILIZATION DEVICE FOR CABLE NETWORK
US4328590A (en) * 1980-10-31 1982-05-04 Westinghouse Electric Corp. Single sideband receiver
US4761825A (en) * 1985-10-30 1988-08-02 Capetronic (Bsr) Ltd. TVRO earth station receiver for reducing interference and improving picture quality
JPH0243822A (en) * 1988-08-03 1990-02-14 Toshiba Corp Television tuner
US5168214A (en) * 1991-02-19 1992-12-01 General Electric Company Multi-rate superresolution time series spectrum analyzer
JP3004105B2 (en) * 1991-11-15 2000-01-31 株式会社東芝 Television receiver
KR0119499Y1 (en) * 1993-08-20 1998-07-15 김광호 Sound carrier detection circuit
US6057876A (en) * 1996-12-18 2000-05-02 General Instrument Corporation Dual conversion settop terminal including a system for avoiding oscillator difference beats
AU768012B2 (en) * 1998-09-08 2003-11-27 Asvan Technology, Llc. Enhanced security communications system
US7043211B1 (en) * 1998-11-30 2006-05-09 General Instrument Corporation Universal modulator
JP2003223992A (en) * 2002-01-31 2003-08-08 Toyota Industries Corp Organic el color display device
US20040060074A1 (en) * 2002-09-19 2004-03-25 Ganesh Basawapatna Video distribution system with increased centralized processing
US7690022B2 (en) * 2002-10-02 2010-03-30 Ganesh Basawapatna Video distribution system for digital and analog subscribers
US7502587B2 (en) * 2004-05-28 2009-03-10 Echostar Technologies Corporation Method and device for band translation
US8000274B2 (en) * 2005-04-05 2011-08-16 Samsung Electronics Co., Ltd. Versatile system for transceiver noise reduction in a time-division duplexing wireless network
US9825772B2 (en) * 2010-04-15 2017-11-21 Time Warner Cable Enterprises Llc Apparatus and method for increasing upstream capacity in a broadband communications system

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2935607A (en) * 1959-02-09 1960-05-03 Rca Corp Frequency variation response circuit
US3209271A (en) * 1961-08-17 1965-09-28 Radiation Inc Phase-locked loops
GB1043231A (en) * 1962-05-30 1966-09-21 Communications Patents Ltd Improved wired broadcasting systems and apparatus therefor
US3358240A (en) * 1965-03-11 1967-12-12 George A Mckay Extended phase detector for phaselocked loop receivers
US3333198A (en) * 1965-12-29 1967-07-25 Ampli Vision Corp Television converter for catv system
US3510776A (en) * 1966-02-16 1970-05-05 Motorola Inc Fm tone signal receiving circuit
US3518376A (en) * 1966-06-02 1970-06-30 Educasting Systems Inc Low frequency television system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2191370A (en) * 1986-06-04 1987-12-09 British Telecomm Cable television distribution system

Also Published As

Publication number Publication date
US3639840A (en) 1972-02-01

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed