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 languages
Danish (da)
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 (cg-RX-API-DMAC10.html) 1971-10-05 1971-10-05
JP47016186A JPS5115966B2 (cg-RX-API-DMAC10.html) 1972-02-16 1972-02-16
JP1810972A JPS5535039B2 (cg-RX-API-DMAC10.html) 1972-02-23 1972-02-23
JP47022098A JPS5116121B2 (cg-RX-API-DMAC10.html) 1972-03-03 1972-03-03
JP47033842A JPS5221882B2 (cg-RX-API-DMAC10.html) 1972-04-06 1972-04-06
JP47040677A JPS5221883B2 (cg-RX-API-DMAC10.html) 1972-04-22 1972-04-22
JP47051495A JPS5117403B2 (cg-RX-API-DMAC10.html) 1972-05-24 1972-05-24

Publications (2)

Publication Number Publication Date
DK137153B DK137153B (da) 1978-01-23
DK137153C true DK137153C (cg-RX-API-DMAC10.html) 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 (cg-RX-API-DMAC10.html)
CA (1) CA1002616A (cg-RX-API-DMAC10.html)
DE (1) DE2248769B2 (cg-RX-API-DMAC10.html)
DK (1) DK137153B (cg-RX-API-DMAC10.html)
GB (1) GB1410381A (cg-RX-API-DMAC10.html)
NL (1) NL175870C (cg-RX-API-DMAC10.html)
SE (1) SE384431B (cg-RX-API-DMAC10.html)

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
GB1410381A (en) 1975-10-15
DK137153B (da) 1978-01-23
NL175870B (nl) 1984-08-01
DE2248769A1 (de) 1973-04-19
US3983500A (en) 1976-09-28
NL7213487A (cg-RX-API-DMAC10.html) 1973-04-09
CA1002616A (en) 1976-12-28

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Legal Events

Date Code Title Description
PBP Patent lapsed