GB791793A - Improvements in or relating to low-frequency amplifiers - Google Patents

Improvements in or relating to low-frequency amplifiers

Info

Publication number
GB791793A
GB791793A GB13544/56A GB1354456A GB791793A GB 791793 A GB791793 A GB 791793A GB 13544/56 A GB13544/56 A GB 13544/56A GB 1354456 A GB1354456 A GB 1354456A GB 791793 A GB791793 A GB 791793A
Authority
GB
United Kingdom
Prior art keywords
low
loud
speaker
tone
screen grid
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
GB13544/56A
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 Electrical Industries Ltd
Original Assignee
Philips Electrical 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 Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB791793A publication Critical patent/GB791793A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
    • H03F1/36—Negative-feedback-circuit arrangements with or without positive feedback in discharge-tube amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/22—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with tubes only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
    • H04R3/14—Cross-over networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

791,793. Circuits for loud-speakers. PHILIPS ELECTRICAL INDUSTRIES, Ltd. May 2, 1956 [May 5, 1955], No. 13544/56. Class 40 (4). In a low-frequency amplifier a high-tone and a low-tone loudspeaker are connected in series in the anode circuit of a screen grid valve, the input impedance of the lowtone loud-speaker being connected between the anode and the screen grid of the valve and being shunted by a capacitor which offers a low impedance to the high-frequencies of the audiofrequency spectrum. As shown in Fig. 1, the high-tone loud-speaker 16 has a low impedance so that for low frequencies the screen grid 18 is substantially at the potential of battery 8 and the valve acts as a pentode with a high gain and with a high distortion factor that is of no consequence to the low-tone loud-speaker 12. For high frequencies loud-speaker 12 is shortcircuited by capacitor 17 so that the anode and screen grid are effectively connected together and the valve acts as s triode with a low gain and a low distortion factor. The invention may be applied to a push-pull arrangement using two pentodes. Specification 496,883, [Group XL], is referred to.
GB13544/56A 1955-05-05 1956-05-02 Improvements in or relating to low-frequency amplifiers Expired GB791793A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT791793X 1955-05-05

Publications (1)

Publication Number Publication Date
GB791793A true GB791793A (en) 1958-03-12

Family

ID=3681002

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13544/56A Expired GB791793A (en) 1955-05-05 1956-05-02 Improvements in or relating to low-frequency amplifiers

Country Status (6)

Country Link
US (1) US2846503A (en)
BE (1) BE547520A (en)
DE (1) DE1001327B (en)
FR (1) FR1152720A (en)
GB (1) GB791793A (en)
NL (2) NL89562C (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1055839B (en) * 1957-10-25 1959-04-23 Loewe Opta Ag Method for recording sound vibrations on magnetic sound carriers
US2980840A (en) * 1958-08-08 1961-04-18 Levy Lester Wide band, low distortion, high efficiency amplifier
US3060264A (en) * 1959-01-27 1962-10-23 Rojprasit Adisaun Amplifier
NL248979A (en) * 1959-03-06
NL8600901A (en) * 1986-04-09 1987-11-02 Ir Ronald Jan Geluk MULTI-WAY SPEAKER SYSTEM.
JPS63136494U (en) * 1987-02-27 1988-09-07

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2084160A (en) * 1925-06-09 1937-06-15 Rca Corp Filter system for loudspeakers
US2612558A (en) * 1946-08-13 1952-09-30 Paul W Klipsch Crossover filter network

Also Published As

Publication number Publication date
NL89562C (en)
FR1152720A (en) 1958-02-24
DE1001327B (en) 1957-01-24
US2846503A (en) 1958-08-05
NL206890A (en)
BE547520A (en)

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