GB1410381A - Angle modulated wave demodulation system - Google Patents

Angle modulated wave demodulation system

Info

Publication number
GB1410381A
GB1410381A GB4553872A GB4553872A GB1410381A GB 1410381 A GB1410381 A GB 1410381A GB 4553872 A GB4553872 A GB 4553872A GB 4553872 A GB4553872 A GB 4553872A GB 1410381 A GB1410381 A GB 1410381A
Authority
GB
United Kingdom
Prior art keywords
pll
frequency
time constant
level
circuit
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
GB4553872A
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.)
Victor Company of Japan Ltd
Nippon Victor KK
Original Assignee
Victor Company of Japan Ltd
Nippon Victor KK
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 JP46077531A external-priority patent/JPS4948124B2/ja
Priority claimed from JP47016186A external-priority patent/JPS5115966B2/ja
Priority claimed from JP1810972A external-priority patent/JPS5535039B2/ja
Priority claimed from JP47022098A external-priority patent/JPS5116121B2/ja
Priority claimed from JP47033842A external-priority patent/JPS5221882B2/ja
Priority claimed from JP47040677A external-priority patent/JPS5221883B2/ja
Priority claimed from JP47051495A external-priority patent/JPS5117403B2/ja
Application filed by Victor Company of Japan Ltd, Nippon Victor KK filed Critical Victor Company of Japan Ltd
Publication of GB1410381A publication Critical patent/GB1410381A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/02—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal
    • H03D3/24—Modifications of demodulators to reject or remove amplitude variations by means of locked-in oscillator circuits
    • H03D3/241—Modifications of demodulators to reject or remove amplitude variations by means of locked-in oscillator circuits the oscillator being part of a phase locked loop
    • H03D3/244—Modifications of demodulators to reject or remove amplitude variations by means of locked-in oscillator circuits the oscillator being part of a phase locked loop combined with means for obtaining automatic gain control
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00992—Circuits for stereophonic or quadraphonic recording or reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/0007—Circuits or methods for reducing noise, for correction of distortion, or for changing density of recorded information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic
    • H04S3/006—Systems employing more than two channels, e.g. quadraphonic in which a plurality of audio signals are transformed in a combination of audio signals and modulated signals, e.g. CD-4 systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
GB4553872A 1971-10-05 1972-10-03 Angle modulated wave demodulation system Expired GB1410381A (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
JP46077531A JPS4948124B2 (enExample) 1971-10-05 1971-10-05
JP47016186A JPS5115966B2 (enExample) 1972-02-16 1972-02-16
JP1810972A JPS5535039B2 (enExample) 1972-02-23 1972-02-23
JP47022098A JPS5116121B2 (enExample) 1972-03-03 1972-03-03
JP47033842A JPS5221882B2 (enExample) 1972-04-06 1972-04-06
JP47040677A JPS5221883B2 (enExample) 1972-04-22 1972-04-22
JP47051495A JPS5117403B2 (enExample) 1972-05-24 1972-05-24

Publications (1)

Publication Number Publication Date
GB1410381A true GB1410381A (en) 1975-10-15

Family

ID=27563739

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4553872A Expired GB1410381A (en) 1971-10-05 1972-10-03 Angle modulated wave demodulation system

Country Status (7)

Country Link
US (1) US3983500A (enExample)
CA (1) CA1002616A (enExample)
DE (1) DE2248769B2 (enExample)
DK (1) DK137153B (enExample)
GB (1) GB1410381A (enExample)
NL (1) NL175870C (enExample)
SE (1) SE384431B (enExample)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4107478A (en) * 1971-10-05 1978-08-15 Victor Company Of Japan, Limited Angle modulated wave demodulation system
US4096360A (en) * 1975-09-27 1978-06-20 Victor Company Of Japan, Ltd. Multichannel record disc reproducing system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3209271A (en) * 1961-08-17 1965-09-28 Radiation Inc Phase-locked loops
US3371281A (en) * 1963-10-24 1968-02-27 Gen Electric Frequency modulation receiver combining frequency feedback and synchronous detection
NL154897B (nl) * 1969-06-07 1977-10-17 Philips Nv Ontvanger met n-waardige fasedemodulator.
CA938560A (en) * 1969-11-28 1973-12-18 Victor Company Of Japan System for recording and/or reproducing four channel signals on a record disc

Also Published As

Publication number Publication date
NL175870C (nl) 1985-01-02
DE2248769B2 (de) 1975-03-13
SE384431B (sv) 1976-05-03
DK137153B (da) 1978-01-23
NL175870B (nl) 1984-08-01
DK137153C (enExample) 1978-06-26
DE2248769A1 (de) 1973-04-19
US3983500A (en) 1976-09-28
NL7213487A (enExample) 1973-04-09
CA1002616A (en) 1976-12-28

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PCNP Patent ceased through non-payment of renewal fee