DE69225132D1 - Einrichtung und verfahren zur korrektur von offset-gleichspannungen in einem empfänger - Google Patents

Einrichtung und verfahren zur korrektur von offset-gleichspannungen in einem empfänger

Info

Publication number
DE69225132D1
DE69225132D1 DE69225132T DE69225132T DE69225132D1 DE 69225132 D1 DE69225132 D1 DE 69225132D1 DE 69225132 T DE69225132 T DE 69225132T DE 69225132 T DE69225132 T DE 69225132T DE 69225132 D1 DE69225132 D1 DE 69225132D1
Authority
DE
Germany
Prior art keywords
voltages
receiver
correcting offset
correcting
offset
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 - Fee Related
Application number
DE69225132T
Other languages
English (en)
Other versions
DE69225132T2 (de
Inventor
David Ficht
Gary Schulz
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.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Application granted granted Critical
Publication of DE69225132D1 publication Critical patent/DE69225132D1/de
Publication of DE69225132T2 publication Critical patent/DE69225132T2/de
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
    • H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
    • H04L25/061—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing hard decisions only; arrangements for tracking or suppressing unwanted low frequency components, e.g. removal of dc offset
    • H04L25/062—Setting decision thresholds using feedforward techniques only
    • 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
    • H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
    • 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
    • H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
    • H04L25/061—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing hard decisions only; arrangements for tracking or suppressing unwanted low frequency components, e.g. removal of dc offset
    • H04L25/063—Setting decision thresholds using feedback techniques only
    • H04L25/064—Subtraction of the threshold from the signal, which is then compared to a supplementary fixed threshold
    • 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
    • H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
    • H04L25/061—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing hard decisions only; arrangements for tracking or suppressing unwanted low frequency components, e.g. removal of dc offset
    • H04L25/066—Multilevel decisions, not including self-organising maps

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Analogue/Digital Conversion (AREA)
DE69225132T 1991-01-25 1992-01-23 Einrichtung und verfahren zur korrektur von offset-gleichspannungen in einem empfänger Expired - Fee Related DE69225132T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/646,539 US5175749A (en) 1991-01-25 1991-01-25 Apparatus and method for dc offset correction in a receiver
PCT/US1992/000573 WO1992013415A1 (en) 1991-01-25 1992-01-23 Apparatus and method for dc offset correction in a receiver

Publications (2)

Publication Number Publication Date
DE69225132D1 true DE69225132D1 (de) 1998-05-20
DE69225132T2 DE69225132T2 (de) 1998-10-08

Family

ID=24593446

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69225132T Expired - Fee Related DE69225132T2 (de) 1991-01-25 1992-01-23 Einrichtung und verfahren zur korrektur von offset-gleichspannungen in einem empfänger

Country Status (7)

Country Link
US (1) US5175749A (de)
EP (1) EP0568646B1 (de)
JP (1) JPH06505380A (de)
KR (1) KR960014428B1 (de)
BR (1) BR9205567A (de)
DE (1) DE69225132T2 (de)
WO (1) WO1992013415A1 (de)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9211712D0 (en) * 1992-06-03 1992-07-15 Fujitsu Microelectronics Ltd Gm digital receive processing
US5546429A (en) * 1992-11-09 1996-08-13 Motorola, Inc. Frequency hopping code division multiple access radio communication unit
GB2274759B (en) * 1993-02-02 1996-11-13 Nokia Mobile Phones Ltd Correction of D.C offset in received and demodulated radio signals
US5608762A (en) * 1993-06-30 1997-03-04 Spectralink Corporation Apparatus and method for automatic discriminator compensation in a FSK receiver
US5857003A (en) * 1993-07-30 1999-01-05 Aria Wireless Systems, Inc. Digital radio having improved modulation and detection processes
CA2124480C (en) * 1993-08-09 1998-09-15 Bernard James Arntz Dc coupled amplifier fed by an rf detector
DE4341937A1 (de) * 1993-12-09 1995-06-14 Philips Patentverwaltung Elektrisches Gerät mit einer Anordnung zur Kompensation eines Gleichspannungsanteils
US5465272A (en) * 1994-04-08 1995-11-07 Synoptics Communications, Inc. Data transmitter baseline wander correction circuit
JP2661574B2 (ja) * 1994-12-28 1997-10-08 日本電気株式会社 Ｌｎ変調器直流バイアス回路
DE19637150A1 (de) * 1996-09-12 1998-04-23 Siemens Ag Schaltung zur Ermittlung und Bewertung eines Datensignals
JPH10163877A (ja) * 1996-11-28 1998-06-19 Sony Corp 復調回路における多値コンパレータのしきい値制御回路
US6175728B1 (en) * 1997-03-05 2001-01-16 Nec Corporation Direct conversion receiver capable of canceling DC offset voltages
US6020839A (en) * 1997-10-27 2000-02-01 Int Labs, Inc. Analog technique to detect asymmetric radio frequency pulses
GB2335809B (en) * 1998-03-24 2001-09-12 Ericsson Telefon Ab L M Demodulator circuits
US6675024B1 (en) * 1999-09-30 2004-01-06 Skyworks Solutions, Inc. System and method for receiving analog and digital signals
US6748200B1 (en) 2000-10-02 2004-06-08 Mark A. Webster Automatic gain control system and method for a ZIF architecture
US7068987B2 (en) 2000-10-02 2006-06-27 Conexant, Inc. Packet acquisition and channel tracking for a wireless communication device configured in a zero intermediate frequency architecture
US8493036B2 (en) 2006-10-21 2013-07-23 Advanced Analogic Technologies, Inc. Controllable charge paths, and related methods
US8310218B2 (en) 2007-08-08 2012-11-13 Advanced Analogic Technologies, Inc. Time-multiplexed-capacitor DC/DC converter with multiple outputs

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3509279A (en) * 1967-05-22 1970-04-28 Collins Radio Co Am data detector with reference level responsive to input and detected data to produce comparison signal
US4186384A (en) * 1975-06-24 1980-01-29 Honeywell Inc. Signal bias remover apparatus
US4263555A (en) * 1979-06-15 1981-04-21 Rca Corporation Signal detection system
JPS60167529A (ja) * 1984-02-10 1985-08-30 Hitachi Ltd 時分割方向制御デイジタル伝送装置
US4873702A (en) * 1988-10-20 1989-10-10 Chiu Ran Fun Method and apparatus for DC restoration in digital receivers

Also Published As

Publication number Publication date
KR960014428B1 (en) 1996-10-15
DE69225132T2 (de) 1998-10-08
JPH06505380A (ja) 1994-06-16
WO1992013415A1 (en) 1992-08-06
KR930703777A (ko) 1993-11-30
BR9205567A (pt) 1994-04-26
EP0568646A4 (en) 1993-12-15
EP0568646B1 (de) 1998-04-15
EP0568646A1 (de) 1993-11-10
US5175749A (en) 1992-12-29

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee