DK137153C - - Google Patents

Info

Publication number
DK137153C
DK137153C DK487572A DK487572A DK137153C DK 137153 C DK137153 C DK 137153C DK 487572 A DK487572 A DK 487572A DK 487572 A DK487572 A DK 487572A DK 137153 C DK137153 C DK 137153C
Authority
DK
Denmark
Application number
DK487572A
Other versions
DK137153B (da
Inventor
N Takahashi
K Nishikawa
Y Iwasaki
M Satoh
K Ohba
S Nakamura
T Sawada
N Ohsaki
Y Itoh
N Suda
Y Okabe
H Ozaki
Original Assignee
Victor Company Of Japan 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 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. filed Critical Victor Company Of Japan Ltd.
Publication of DK137153B publication Critical patent/DK137153B/da
Application granted granted Critical
Publication of DK137153C publication Critical patent/DK137153C/da

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)
DK487572AA 1971-10-05 1972-10-02 Demodulationsanlæg for vinkelmodulerede bølger. DK137153B (da)

Applications Claiming Priority (7)

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

Publications (2)

Publication Number Publication Date
DK137153B DK137153B (da) 1978-01-23
DK137153C true DK137153C (da) 1978-06-26

Family

ID=27563739

Family Applications (1)

Application Number Title Priority Date Filing Date
DK487572AA DK137153B (da) 1971-10-05 1972-10-02 Demodulationsanlæg for vinkelmodulerede bølger.

Country Status (7)

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

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
NL7213487A (da) 1973-04-09
DE2248769B2 (de) 1975-03-13
US3983500A (en) 1976-09-28
DK137153B (da) 1978-01-23
NL175870B (nl) 1984-08-01
NL175870C (nl) 1985-01-02
DE2248769A1 (de) 1973-04-19
SE384431B (sv) 1976-05-03
CA1002616A (en) 1976-12-28
GB1410381A (en) 1975-10-15

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Legal Events

Date Code Title Description
PBP Patent lapsed