GB1249761A - Transmission device for the transmission of analog signals by means of pulse code modulation - Google Patents

Transmission device for the transmission of analog signals by means of pulse code modulation

Info

Publication number
GB1249761A
GB1249761A GB3324/70A GB332470A GB1249761A GB 1249761 A GB1249761 A GB 1249761A GB 3324/70 A GB3324/70 A GB 3324/70A GB 332470 A GB332470 A GB 332470A GB 1249761 A GB1249761 A GB 1249761A
Authority
GB
United Kingdom
Prior art keywords
integrator
time
counter
voltage
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
GB3324/70A
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.)
Telecommunications Radioelectriques et Telephoniques SA TRT
Original Assignee
Telecommunications Radioelectriques et Telephoniques SA TRT
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 Telecommunications Radioelectriques et Telephoniques SA TRT filed Critical Telecommunications Radioelectriques et Telephoniques SA TRT
Publication of GB1249761A publication Critical patent/GB1249761A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03MCODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00Analogue/digital conversion; Digital/analogue conversion
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03MCODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12Analogue/digital converters
    • H03M1/50Analogue/digital converters with intermediate conversion to time interval

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

1,249,761. Analogue/digital and digital analogue converters. TELECOMMUNICATIONS RADIOELECTRIQUES ET TELEPHONIQUES. 23 Jan., 1970 [28 Jan., 1969], No. 3324/70. Heading G4H. A dual ramp digital voltmeter is modified in that the integrator A 2 , C 1 (Fig. 5) receiving the input signal for a fixed time interval P 1 is discharged by a voltage - V R for a time which is measured by counting clock pulses in a counter K 1 (Fig. 7) to a threshold level E 0 a second integrator A 5 , C 2 then being charged at the start of the next clock pulse by a current proportional to this residual voltage for a fixed time and discharged by a reference voltage - V R /2<SP>6</SP> the time for discharge to a zero level being measured by counting clock pulses in a second counter K 2 . In the embodiment described the application of the input signals and the reference signals to the integrators are controlled by MOS transistor switches. To reconstitute the original analogue signal the complements of the count in the counters K 1 , K 2 are stored in counters (K<SP>1</SP>, K<SP>11</SP>, Fig. 10, not shown) the counter constituting the most significant part being then counted down to zero during which time an integrator (A 7 , C 3 , Fig. 8, not shown) integrates a reference signal, proportional to V 2 , the second counter K<SP>1</SP> 2 then being counted down to zero during which time a second reference signal proportional to - V R /2<SP>6</SP> is applied to the integrator. An operational amplifier A 8 is connected as a voltage follower to the output of the integrator to give an output voltage representing the mean value of the recovered signal.
GB3324/70A 1969-01-28 1970-01-23 Transmission device for the transmission of analog signals by means of pulse code modulation Expired GB1249761A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6901611A FR2029837A5 (en) 1969-01-28 1969-01-28

Publications (1)

Publication Number Publication Date
GB1249761A true GB1249761A (en) 1971-10-13

Family

ID=9028265

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3324/70A Expired GB1249761A (en) 1969-01-28 1970-01-23 Transmission device for the transmission of analog signals by means of pulse code modulation

Country Status (10)

Country Link
JP (1) JPS5616970B1 (en)
BE (1) BE744960A (en)
BR (1) BR7016279D0 (en)
CH (1) CH504814A (en)
DE (1) DE2003074C3 (en)
DK (1) DK125670B (en)
FR (1) FR2029837A5 (en)
GB (1) GB1249761A (en)
NL (1) NL162273C (en)
SE (1) SE353628B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2855282C2 (en) * 1978-12-21 1980-10-23 Kernforschungsanlage Juelich Gmbh, 5170 Juelich Dual slope integrator
JPS5799821A (en) * 1980-12-15 1982-06-21 Sony Corp Digital-to-analogue converter

Also Published As

Publication number Publication date
JPS5616970B1 (en) 1981-04-20
BE744960A (en) 1970-07-27
NL7001031A (en) 1970-07-30
DE2003074A1 (en) 1970-10-22
DK125670B (en) 1973-03-19
CH504814A (en) 1971-03-15
NL162273C (en) 1980-04-15
NL162273B (en) 1979-11-15
FR2029837A5 (en) 1970-10-23
BR7016279D0 (en) 1973-01-04
DE2003074C3 (en) 1980-04-10
SE353628B (en) 1973-02-05
DE2003074B2 (en) 1979-08-09

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