GB1473833A - Circuit for the dynamic range of a signal - Google Patents

Circuit for the dynamic range of a signal

Info

Publication number
GB1473833A
GB1473833A GB5014476A GB5014476A GB1473833A GB 1473833 A GB1473833 A GB 1473833A GB 5014476 A GB5014476 A GB 5014476A GB 5014476 A GB5014476 A GB 5014476A GB 1473833 A GB1473833 A GB 1473833A
Authority
GB
United Kingdom
Prior art keywords
dynamic range
voltage
impedance
circuit
input signal
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
GB5014476A
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.)
DOLBY LABORATORIES Inc
Original Assignee
DOLBY LABORATORIES Inc
Dolby Laboratories Inc
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 GB2363873A external-priority patent/GB1473831A/en
Application filed by DOLBY LABORATORIES Inc, Dolby Laboratories Inc filed Critical DOLBY LABORATORIES Inc
Priority to GB5014476A priority Critical patent/GB1473833A/en
Publication of GB1473833A publication Critical patent/GB1473833A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/62—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
    • H04B1/64—Volume compression or expansion arrangements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
    • H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
    • H03G9/025—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers frequency-dependent volume compression or expansion, e.g. multiple-band systems

Abstract

1473833 Companders DOLBY LABORATORIES Inc 13 May 1974 [17 May 1973] 50144/76 Divided out of 1473831 Heading H4R The Specification repeats the description in the parent Specification 1,473,831, but relates to a circuit for modifying the dynamic range of an input signal, comprising a series connection of a dynamic range linear impedance including a resistor, and a two terminal variable impedance (Fig. 9a) including a frequency selective circuit responsive to the current in that impedance to introduce a voltage across it, the frequency selective circuit comprising a variable filter restricting the introduced voltage to one tenth of the voltage across the dynamic range linear impedance at maximum input signal level, and instantaneous limiting means (such as antiparallel diodes, possibly in an amplifier loop) to suppress overshoot of the introduced voltage.
GB5014476A 1973-05-17 1974-05-13 Circuit for the dynamic range of a signal Expired GB1473833A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5014476A GB1473833A (en) 1973-05-17 1974-05-13 Circuit for the dynamic range of a signal

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2363873A GB1473831A (en) 1973-05-17 1973-05-17
GB5014476A GB1473833A (en) 1973-05-17 1974-05-13 Circuit for the dynamic range of a signal

Publications (1)

Publication Number Publication Date
GB1473833A true GB1473833A (en) 1977-05-18

Family

ID=26256643

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5014476A Expired GB1473833A (en) 1973-05-17 1974-05-13 Circuit for the dynamic range of a signal

Country Status (1)

Country Link
GB (1) GB1473833A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3103237A1 (en) * 1980-01-30 1981-12-03 Sony Corp., Tokyo CIRCUIT ARRANGEMENT FOR NOISE REDUCTION OR. FOR LEVEL COMPRESSION / LEVEL EXPANSION OF SIGNALS
US4471318A (en) * 1980-01-28 1984-09-11 Sony Corporation Circuit for noise reduction particularly useful with signal recording/reproducing apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4471318A (en) * 1980-01-28 1984-09-11 Sony Corporation Circuit for noise reduction particularly useful with signal recording/reproducing apparatus
DE3103237A1 (en) * 1980-01-30 1981-12-03 Sony Corp., Tokyo CIRCUIT ARRANGEMENT FOR NOISE REDUCTION OR. FOR LEVEL COMPRESSION / LEVEL EXPANSION OF SIGNALS

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19940512