WO2001047109A3 - Low voltage differential signal (lvds) input circuit - Google Patents

Low voltage differential signal (lvds) input circuit Download PDF

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Publication number
WO2001047109A3
WO2001047109A3 PCT/EP2000/012508 EP0012508W WO0147109A3 WO 2001047109 A3 WO2001047109 A3 WO 2001047109A3 EP 0012508 W EP0012508 W EP 0012508W WO 0147109 A3 WO0147109 A3 WO 0147109A3
Authority
WO
WIPO (PCT)
Prior art keywords
over
lvds
amplifiers
common mode
low voltage
Prior art date
Application number
PCT/EP2000/012508
Other languages
French (fr)
Other versions
WO2001047109A2 (en
Inventor
Joakim Bangs
John Thompson
Raymond Filippi
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Priority to AU20078/01A priority Critical patent/AU2007801A/en
Publication of WO2001047109A2 publication Critical patent/WO2001047109A2/en
Publication of WO2001047109A3 publication Critical patent/WO2001047109A3/en

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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
    • H04L25/0292—Arrangements specific to the receiver end
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
    • H03F3/4508—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using bipolar transistors as the active amplifying circuit
    • H03F3/45085—Long tailed pairs
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45479—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection
    • H03F3/45484—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection in differential amplifiers with bipolar transistors as the active amplifying circuit
    • H03F3/45547—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection in differential amplifiers with bipolar transistors as the active amplifying circuit by using feedforward means
    • H03F3/45551—Measuring at the input circuit of the differential amplifier
    • H03F3/45556—Controlling the input circuit of the differential amplifier
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45479—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection
    • H03F3/45484—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection in differential amplifiers with bipolar transistors as the active amplifying circuit
    • H03F3/45547—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection in differential amplifiers with bipolar transistors as the active amplifying circuit by using feedforward means
    • H03F3/45551—Measuring at the input circuit of the differential amplifier
    • H03F3/4556—Controlling the common emitter circuit of the differential amplifier
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/22—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral
    • H03K5/24—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral the characteristic being amplitude
    • H03K5/2409—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral the characteristic being amplitude using bipolar transistors
    • H03K5/2418—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral the characteristic being amplitude using bipolar transistors with at least one differential stage
    • 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
    • H04L25/0272—Arrangements for coupling to multiple lines, e.g. for differential transmission
    • H04L25/0276—Arrangements for coupling common mode signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45418—Indexing scheme relating to differential amplifiers the CMCL comprising a resistor addition circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45424—Indexing scheme relating to differential amplifiers the CMCL comprising a comparator circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45592—Indexing scheme relating to differential amplifiers the IC comprising one or more buffer stages other than emitter or source followers between the input signal leads and input leads of the dif amp, e.g. inverter stages
    • 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
    • H04L25/028—Arrangements specific to the transmitter end

Abstract

Problems associated with using bipolar differential circuits over a wide common mode voltage range are solved using first and second amplifier circuits (3 and 5), respectively operating over first and second voltage sub-ranges. The low voltage differential signal (LVDS) (1) is applied across a pair of series connected resistors (7 and 9), and to the inputs of the amplifiers (3 and 5). The common mode voltage signal (11) is fed to the inputs of third and fourth amplifiers (15 and 17). The third and fourth amplifiers (15 and 17) ensure that the LVDS receiver has a constant linear transfer characteristic over the differential input signal range and over the full common mode range, especially over the amplifier transition region.
PCT/EP2000/012508 1999-12-20 2000-12-11 Low voltage differential signal (lvds) input circuit WO2001047109A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU20078/01A AU2007801A (en) 1999-12-20 2000-12-11 Low voltage differential signal (lvds) input circuit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9930051.9 1999-12-20
GB9930051A GB2357644B (en) 1999-12-20 1999-12-20 Low-voltage differential signal (LVDS) input circuit

Publications (2)

Publication Number Publication Date
WO2001047109A2 WO2001047109A2 (en) 2001-06-28
WO2001047109A3 true WO2001047109A3 (en) 2001-12-13

Family

ID=10866646

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/012508 WO2001047109A2 (en) 1999-12-20 2000-12-11 Low voltage differential signal (lvds) input circuit

Country Status (5)

Country Link
US (1) US6504403B2 (en)
AU (1) AU2007801A (en)
GB (1) GB2357644B (en)
TW (1) TW472443B (en)
WO (1) WO2001047109A2 (en)

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US7844437B1 (en) 2001-11-19 2010-11-30 Cypress Semiconductor Corporation System and method for performing next placements and pruning of disallowed placements for programming an integrated circuit
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US7635994B1 (en) * 2006-01-20 2009-12-22 Spansion Llc Fast rail-to-rail voltage comparator and method for rail-to-rail voltage comparison
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US9564902B2 (en) 2007-04-17 2017-02-07 Cypress Semiconductor Corporation Dynamically configurable and re-configurable data path
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US8130025B2 (en) * 2007-04-17 2012-03-06 Cypress Semiconductor Corporation Numerical band gap
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Also Published As

Publication number Publication date
AU2007801A (en) 2001-07-03
US20010004219A1 (en) 2001-06-21
US6504403B2 (en) 2003-01-07
WO2001047109A2 (en) 2001-06-28
TW472443B (en) 2002-01-11
GB2357644B (en) 2004-05-05
GB9930051D0 (en) 2000-02-09
GB2357644A (en) 2001-06-27

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