GB840084A - Delta-modulation decoding equipment - Google Patents

Delta-modulation decoding equipment

Info

Publication number
GB840084A
GB840084A GB256559A GB256559A GB840084A GB 840084 A GB840084 A GB 840084A GB 256559 A GB256559 A GB 256559A GB 256559 A GB256559 A GB 256559A GB 840084 A GB840084 A GB 840084A
Authority
GB
United Kingdom
Prior art keywords
pulses
group
produce
rectangular
delta
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
GB256559A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB256559A priority Critical patent/GB840084A/en
Publication of GB840084A publication Critical patent/GB840084A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M3/00—Conversion of analogue values to or from differential modulation
    • H03M3/02—Delta modulation, i.e. one-bit differential modulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Electrotherapy Devices (AREA)

Abstract

840,084. Pulse code modulation. STANDARD TELEPHONES & CABLES Ltd. (Nippon Electric Co. Ltd.). Jan. 23, 1959, No. 2565/59. Class 40 (5). In a delta-modulation decoding arrangement means are provided for deriving from each group of code pulses containing an uninterrupted succession of code pulses a rectangular pulse of duration corresponding to the number of pulses in the group, and for integrating the rectangular pulses in such a manner to produce a wave consisting of substantially linear portions which slope alternately in opposite directions. Pulses a<SP>1</SP>, Fig. 5, after clipping by rectifier 17, are applied to condenser 20 in the grid circuit of one valve 21 of a triggered pair (Schmitt circuit) 21, 22, and produce on the grid a voltage f, E 1 being the standing bias, and E o the point at which tube 21 becomes conductive. Rectangular pulses d having a duration corresponding to the number of pulses in a group, are taken from the anode of valve 22 and produce wave-shape e after integration in network 23, 24.
GB256559A 1959-01-23 1959-01-23 Delta-modulation decoding equipment Expired GB840084A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB256559A GB840084A (en) 1959-01-23 1959-01-23 Delta-modulation decoding equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB256559A GB840084A (en) 1959-01-23 1959-01-23 Delta-modulation decoding equipment

Publications (1)

Publication Number Publication Date
GB840084A true GB840084A (en) 1960-07-06

Family

ID=9741812

Family Applications (1)

Application Number Title Priority Date Filing Date
GB256559A Expired GB840084A (en) 1959-01-23 1959-01-23 Delta-modulation decoding equipment

Country Status (1)

Country Link
GB (1) GB840084A (en)

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