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 modulationInfo
- 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
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/50—Analogue/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.
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)
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 |
-
1969
- 1969-01-28 FR FR6901611A patent/FR2029837A5/fr not_active Expired
-
1970
- 1970-01-23 DE DE2003074A patent/DE2003074C3/en not_active Expired
- 1970-01-23 GB GB3324/70A patent/GB1249761A/en not_active Expired
- 1970-01-23 DK DK32670AA patent/DK125670B/en unknown
- 1970-01-24 JP JP619770A patent/JPS5616970B1/ja active Pending
- 1970-01-24 NL NL7001031.A patent/NL162273C/en active
- 1970-01-26 BR BR216279/70A patent/BR7016279D0/en unknown
- 1970-01-26 SE SE00923/70A patent/SE353628B/xx unknown
- 1970-01-26 BE BE744960D patent/BE744960A/en unknown
- 1970-01-26 CH CH104270A patent/CH504814A/en not_active IP Right Cessation
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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