GB987315A - Improvements in or relating to audio frequency amplifying circuit arrangements - Google Patents

Improvements in or relating to audio frequency amplifying circuit arrangements

Info

Publication number
GB987315A
GB987315A GB423163A GB423163A GB987315A GB 987315 A GB987315 A GB 987315A GB 423163 A GB423163 A GB 423163A GB 423163 A GB423163 A GB 423163A GB 987315 A GB987315 A GB 987315A
Authority
GB
United Kingdom
Prior art keywords
modified
signal
signals
resistor
channel
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
GB423163A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries 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
Application filed by Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB987315A publication Critical patent/GB987315A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/02—Manually-operated control
    • H03G5/04—Manually-operated control in untuned amplifiers
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K15/00—Acoustics not otherwise provided for
    • G10K15/08—Arrangements for producing a reverberation or echo sound
    • G10K15/12—Arrangements for producing a reverberation or echo sound using electronic time-delay networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/04—Circuit arrangements, e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Amplifiers (AREA)
  • Stereophonic System (AREA)

Abstract

987,315. Reverberation systems; stereophonic systems. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Feb. 1, 1963 [Feb. 6, 1962], No. 4231/63. Heading H4R. A circuit arrangement for amplifying audiofrequency signals, including a modified signal derived therefrom, comprises an amplifier 1 in the channel for the non-modified signals and a signal modification device 7 having its output 9 connected to the input of the amplifier 1 and its input 6 connected to the output of the channel for the non-modified signals and also to an additional circuit (including a resistor 15) arranged to feed the modified signal substantially in phase opposition to the modified signal received from the output of the channel for the non-modified signals. A 180 degrees phase shift takes place in resistor 16 and potentiometer 5 is adjusted so that the modified signal fed back over the path 16, 1, 14 neutralizes that fed back through resistor 15. In a stereophonic system, Fig. 2 (not shown), a common signal modification device 7 serves both channels, so that the same reverberation signal appears in both outputs.
GB423163A 1962-02-06 1963-02-01 Improvements in or relating to audio frequency amplifying circuit arrangements Expired GB987315A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL274458A NL274458A (en) 1962-02-06 1962-02-06 Apparatus for amplifying sound signals and a modified signal derived from these signals.

Publications (1)

Publication Number Publication Date
GB987315A true GB987315A (en) 1965-03-24

Family

ID=19753594

Family Applications (1)

Application Number Title Priority Date Filing Date
GB423163A Expired GB987315A (en) 1962-02-06 1963-02-01 Improvements in or relating to audio frequency amplifying circuit arrangements

Country Status (5)

Country Link
AT (1) AT252610B (en)
BE (1) BE627974A (en)
DE (1) DE1279100B (en)
GB (1) GB987315A (en)
NL (1) NL274458A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7607182A (en) * 1976-06-30 1978-01-03 Novanex Automation Nv ELECTRONIC ECHO DEVICE.

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2230836A (en) * 1939-07-15 1941-02-04 Hammond Laurens Electrical musical instrument

Also Published As

Publication number Publication date
BE627974A (en) 1963-08-05
NL274458A (en) 1964-09-25
AT252610B (en) 1967-02-27
DE1279100B (en) 1968-10-03

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