GB2004165A - CMI encoder - Google Patents

CMI encoder

Info

Publication number
GB2004165A
GB2004165A GB7836012A GB7836012A GB2004165A GB 2004165 A GB2004165 A GB 2004165A GB 7836012 A GB7836012 A GB 7836012A GB 7836012 A GB7836012 A GB 7836012A GB 2004165 A GB2004165 A GB 2004165A
Authority
GB
United Kingdom
Prior art keywords
bistable
gate
data rate
cmi encoder
clock
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.)
Withdrawn
Application number
GB7836012A
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.)
Post Office
Original Assignee
Post Office
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 Post Office filed Critical Post Office
Priority to GB7836012A priority Critical patent/GB2004165A/en
Publication of GB2004165A publication Critical patent/GB2004165A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4906—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using binary codes
    • H04L25/4908—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using binary codes using mBnB codes
    • H04L25/491—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using binary codes using mBnB codes using 1B2B codes
    • H04L25/4912—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using binary codes using mBnB codes using 1B2B codes using CMI or 2-HDB-3 code

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)

Abstract

In a CMI encoder the output OR gate is replaced by a D-type bistable which is re-set by short pulses, derived from the clock pulses supplied to the coder after they have first been gated with this data. The bistable acts as a clock OR gate and removes jitter. In this circuit configuration the D-type bistable only needs to operate at the data rate and not at twice the data rate. <IMAGE>
GB7836012A 1977-07-04 1978-09-07 CMI encoder Withdrawn GB2004165A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7836012A GB2004165A (en) 1977-07-04 1978-09-07 CMI encoder

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2794577 1977-07-04
GB7836012A GB2004165A (en) 1977-07-04 1978-09-07 CMI encoder

Publications (1)

Publication Number Publication Date
GB2004165A true GB2004165A (en) 1979-03-21

Family

ID=26259090

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7836012A Withdrawn GB2004165A (en) 1977-07-04 1978-09-07 CMI encoder

Country Status (1)

Country Link
GB (1) GB2004165A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2350526A (en) * 1999-03-23 2000-11-29 Frederick Charles Court Quaternary data communications apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2350526A (en) * 1999-03-23 2000-11-29 Frederick Charles Court Quaternary data communications apparatus

Similar Documents

Publication Publication Date Title
NO832239L (en) SYNCHRON RATE GENERATOR FOR DIGITAL SIGNAL MULTIPLE DEVICES
GB2004165A (en) CMI encoder
JPS524877A (en) Digital electronic clock
JPS53136424A (en) Correlative processing system for picture signal
JPS5362908A (en) Bit clock reproducer
JPS52102613A (en) Frame synchronization signal detector circuit
JPS5240907A (en) Die code signal transmission system
JPS53135255A (en) Pulse counting system
JPS52137964A (en) Preset counter
JPS53116444A (en) Enclosed switchboard
JPS52116061A (en) Checkin unit for digital circuit
JPS5313849A (en) Output circuit
JPS5244125A (en) Variable length interface circuit
JPS5231545A (en) Semiautomatic sliding door by utilzing magnet
JPS5220674A (en) Dehydration device
KR840001725A (en) Digital Serial Interface with Decode Logic
JPS5384644A (en) Synchronizing circuit
JPS53118302A (en) Signal deciding device
JPS5214321A (en) Reference order decision circuit
JPS5222430A (en) Sampling pulse control system
JPS5425643A (en) Data channel clear system
JPS52149405A (en) Data pulse fetch circuit
JPS51116042A (en) Two-leaved sliding door closing device
JPS53120228A (en) Key input device
JPS5376000A (en) Writing circuit

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)