GB2287145A - Line driver circuit - Google Patents

Line driver circuit

Info

Publication number
GB2287145A
GB2287145A GB9507067A GB9507067A GB2287145A GB 2287145 A GB2287145 A GB 2287145A GB 9507067 A GB9507067 A GB 9507067A GB 9507067 A GB9507067 A GB 9507067A GB 2287145 A GB2287145 A GB 2287145A
Authority
GB
United Kingdom
Prior art keywords
driver circuit
terminals
line driver
transformer
matching resistor
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
GB9507067A
Other versions
GB2287145B (en
GB9507067D0 (en
Inventor
Markku Henriksson
Marcos Katz
Hemmo Ristimaeki
Kari Sahlman
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.)
Nokia Oyj
Original Assignee
Nokia Telecommunications Oy
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 Nokia Telecommunications Oy filed Critical Nokia Telecommunications Oy
Publication of GB9507067D0 publication Critical patent/GB9507067D0/en
Publication of GB2287145A publication Critical patent/GB2287145A/en
Application granted granted Critical
Publication of GB2287145B publication Critical patent/GB2287145B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0264—Arrangements for coupling to transmission lines
    • H04L25/0266—Arrangements for providing Galvanic isolation, e.g. by means of magnetic or capacitive coupling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising

Abstract

The invention relates to a line driver circuit, comprising a driver stage (11) and a transformer provided with a primary and secondarywindings (12a, 12b) in such a way that output terminals of the driver stage (11) are connected to terminals of the primary winding (12a) of the transformer and terminals of the secondary winding (12b) of the transformer are connected to a transmission line (13), at least one matching resistor (Rm) being connected to the terminals of the primary winding of the line driver circuit. To provide a line driver circuit having a good return loss and a low power consumption, it comprises driver means (51 to 53; 71, 72; 81, Q1, Q2) connected to said at least one matching resistor and responsive to an output signal of the driver stage (11) for disconnecting the matching resistor (Rm; Rm1, Rm2) for the time of pulses transmitted by the driver stage. <IMAGE>
GB9507067A 1992-10-07 1993-10-06 Line driver circuit Expired - Fee Related GB2287145B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI924523A FI100069B (en) 1992-10-07 1992-10-07 Bus Driver Circuit
PCT/FI1993/000400 WO1994008398A1 (en) 1992-10-07 1993-10-06 Line driver circuit

Publications (3)

Publication Number Publication Date
GB9507067D0 GB9507067D0 (en) 1995-05-31
GB2287145A true GB2287145A (en) 1995-09-06
GB2287145B GB2287145B (en) 1997-03-26

Family

ID=8535999

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9507067A Expired - Fee Related GB2287145B (en) 1992-10-07 1993-10-06 Line driver circuit

Country Status (6)

Country Link
AU (1) AU5112593A (en)
DE (1) DE4394820T1 (en)
FI (1) FI100069B (en)
GB (1) GB2287145B (en)
HK (1) HK1006613A1 (en)
WO (1) WO1994008398A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0247675A1 (en) * 1986-05-26 1987-12-02 AT&amp;T NETWORK SYSTEMS NEDERLAND B.V. Transmitter for ISDN S-bus interface circuit
US4987322A (en) * 1989-04-07 1991-01-22 Hewlett-Packard Company Driver-receiver pair for low noise digital signaling
EP0428975A2 (en) * 1989-11-20 1991-05-29 Fujitsu Limited Constant voltage drive type driver circuit

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0248818A (en) * 1988-05-24 1990-02-19 Nec Corp Line driver circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0247675A1 (en) * 1986-05-26 1987-12-02 AT&amp;T NETWORK SYSTEMS NEDERLAND B.V. Transmitter for ISDN S-bus interface circuit
US4987322A (en) * 1989-04-07 1991-01-22 Hewlett-Packard Company Driver-receiver pair for low noise digital signaling
EP0428975A2 (en) * 1989-11-20 1991-05-29 Fujitsu Limited Constant voltage drive type driver circuit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Patent Abstracts of Japan,Vol.14,No.213, E-923, abstract of JP, A, 2-48818(NEC CORP),19.2.1990. *

Also Published As

Publication number Publication date
FI924523A0 (en) 1992-10-07
WO1994008398A1 (en) 1994-04-14
FI100069B (en) 1997-09-15
HK1006613A1 (en) 1999-03-05
FI924523A (en) 1994-04-08
AU5112593A (en) 1994-04-26
DE4394820T1 (en) 1996-03-21
GB2287145B (en) 1997-03-26
GB9507067D0 (en) 1995-05-31

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20031006