FR2378401A1 - A=D encoder with preset coding plate - uses variable gain amplifier circuit which produces constant signal with controlled variable phase shift - Google Patents

A=D encoder with preset coding plate - uses variable gain amplifier circuit which produces constant signal with controlled variable phase shift

Info

Publication number
FR2378401A1
FR2378401A1 FR7701529A FR7701529A FR2378401A1 FR 2378401 A1 FR2378401 A1 FR 2378401A1 FR 7701529 A FR7701529 A FR 7701529A FR 7701529 A FR7701529 A FR 7701529A FR 2378401 A1 FR2378401 A1 FR 2378401A1
Authority
FR
France
Prior art keywords
signal
coder
phase shift
amplifier circuit
control
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.)
Granted
Application number
FR7701529A
Other languages
French (fr)
Other versions
FR2378401B1 (en
Inventor
Henri Berard
Christian Gaubert
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.)
Alcatel CIT SA
Original Assignee
Alcatel CIT SA
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 Alcatel CIT SA filed Critical Alcatel CIT SA
Priority to FR7701529A priority Critical patent/FR2378401A1/en
Publication of FR2378401A1 publication Critical patent/FR2378401A1/en
Application granted granted Critical
Publication of FR2378401B1 publication Critical patent/FR2378401B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
    • H03G3/3026—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being discontinuously variable, e.g. controlled by switching
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/24—Systems for the transmission of television signals using pulse code modulation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/06—Continuously compensating for, or preventing, undesired influence of physical parameters
    • H03M1/08—Continuously compensating for, or preventing, undesired influence of physical parameters of noise

Abstract

The method is for adapting an analogue signal to a digital code for use in a coder functioning by coding amplitude samples of a signal. The coder has a given coding range. In front of the coder is a controlled variable gain amplifier circuit. This circuit can produce a constant continuous signal with controller variable value of phase shift. A range of amplitude variation of a test signal having amplitude characteristics similar to that of the analogue signal is determined. Resulting from the amplitude variations, a control of gain and a control of the shift of the constant signal from the amplifier circuit is determined. The control of gain and shift corresponds respectively to a value of gain and a value of signal phase shift such that the range of variation of the test signal coincides approximately with the code range of the coder. The analogue signal is applied to the amplication circuit controlled by the control thus determined and delivers a signal designed for the coder.
FR7701529A 1977-01-20 1977-01-20 A=D encoder with preset coding plate - uses variable gain amplifier circuit which produces constant signal with controlled variable phase shift Granted FR2378401A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7701529A FR2378401A1 (en) 1977-01-20 1977-01-20 A=D encoder with preset coding plate - uses variable gain amplifier circuit which produces constant signal with controlled variable phase shift

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7701529A FR2378401A1 (en) 1977-01-20 1977-01-20 A=D encoder with preset coding plate - uses variable gain amplifier circuit which produces constant signal with controlled variable phase shift

Publications (2)

Publication Number Publication Date
FR2378401A1 true FR2378401A1 (en) 1978-08-18
FR2378401B1 FR2378401B1 (en) 1980-02-15

Family

ID=9185700

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7701529A Granted FR2378401A1 (en) 1977-01-20 1977-01-20 A=D encoder with preset coding plate - uses variable gain amplifier circuit which produces constant signal with controlled variable phase shift

Country Status (1)

Country Link
FR (1) FR2378401A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0072144A2 (en) * 1981-07-31 1983-02-16 Shimadzu Corporation A-D converter for use in an electronic balance
FR2536620A1 (en) * 1982-11-23 1984-05-25 Rca Corp DIGITAL TELEVISION WITH ANALOGUE-DIGITAL CONVERTER HAVING MULTIPLEX TIME GAIN
FR2544933A1 (en) * 1983-04-22 1984-10-26 Philips Nv METHOD AND DEVICE FOR ADJUSTING THE AMPLIFIER COEFFICIENT OF AN AMPLIFIER
US4540974A (en) * 1981-10-30 1985-09-10 Rca Corporation Adaptive analog-to-digital converter
FR2581492A1 (en) * 1985-05-06 1986-11-07 Inovelf Sa LOGARITHMIC CONVERTERS AND THEIR APPLICATION TO LIGHT MEASUREMENT TRANSMITTED
FR2606956A1 (en) * 1986-11-14 1988-05-20 Radiotechnique Compelec ANALOG-DIGITAL CONVERSION DEVICE HAVING AUTOMATIC GAIN CONTROL DEVICE
FR2648262A1 (en) * 1989-05-22 1990-12-14 Seikosha Kk METHODS AND APPARATUSES FOR RECORDING AND REPRODUCING SOUND SIGNAL
EP0604746A2 (en) * 1992-11-23 1994-07-06 NOKIA TECHNOLOGY GmbH Circuit arrangement for expanding the virtual dynamic range of digital audio signal processor

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0072144A2 (en) * 1981-07-31 1983-02-16 Shimadzu Corporation A-D converter for use in an electronic balance
EP0072144A3 (en) * 1981-07-31 1985-07-03 Shimadzu Corporation A-d converter for use in an electronic balance
US4540974A (en) * 1981-10-30 1985-09-10 Rca Corporation Adaptive analog-to-digital converter
FR2536620A1 (en) * 1982-11-23 1984-05-25 Rca Corp DIGITAL TELEVISION WITH ANALOGUE-DIGITAL CONVERTER HAVING MULTIPLEX TIME GAIN
FR2544933A1 (en) * 1983-04-22 1984-10-26 Philips Nv METHOD AND DEVICE FOR ADJUSTING THE AMPLIFIER COEFFICIENT OF AN AMPLIFIER
FR2581492A1 (en) * 1985-05-06 1986-11-07 Inovelf Sa LOGARITHMIC CONVERTERS AND THEIR APPLICATION TO LIGHT MEASUREMENT TRANSMITTED
EP0201415A1 (en) * 1985-05-06 1986-11-12 INOVELF, Société anonyme dite: Logarithmic converters and their use in the measurement of transmitted light
FR2606956A1 (en) * 1986-11-14 1988-05-20 Radiotechnique Compelec ANALOG-DIGITAL CONVERSION DEVICE HAVING AUTOMATIC GAIN CONTROL DEVICE
EP0271936A1 (en) * 1986-11-14 1988-06-22 Philips Composants Analog-to-digital converter with automatic gain control
FR2648262A1 (en) * 1989-05-22 1990-12-14 Seikosha Kk METHODS AND APPARATUSES FOR RECORDING AND REPRODUCING SOUND SIGNAL
EP0604746A2 (en) * 1992-11-23 1994-07-06 NOKIA TECHNOLOGY GmbH Circuit arrangement for expanding the virtual dynamic range of digital audio signal processor
EP0604746A3 (en) * 1992-11-23 1996-05-08 Nokia Technology Gmbh Circuit arrangement for expanding the virtual dynamic range of digital audio signal processor.

Also Published As

Publication number Publication date
FR2378401B1 (en) 1980-02-15

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse