CH676404A5 - - Google Patents

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Publication number
CH676404A5
CH676404A5 CH432088A CH432088A CH676404A5 CH 676404 A5 CH676404 A5 CH 676404A5 CH 432088 A CH432088 A CH 432088A CH 432088 A CH432088 A CH 432088A CH 676404 A5 CH676404 A5 CH 676404A5
Authority
CH
Switzerland
Prior art keywords
signals
signal
corrected
errors
mixing stages
Prior art date
Application number
CH432088A
Other languages
German (de)
English (en)
Inventor
Urs Bolliger
Walter Vollenweider
Original Assignee
Ascom Radiocom Ag
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 Ascom Radiocom Ag filed Critical Ascom Radiocom Ag
Priority to CH432088A priority Critical patent/CH676404A5/de
Priority to DE19893938643 priority patent/DE3938643C2/de
Publication of CH676404A5 publication Critical patent/CH676404A5/de

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations
    • H03D1/22—Homodyne or synchrodyne circuits
    • H03D1/2245—Homodyne or synchrodyne circuits using two quadrature channels
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/007—Demodulation of angle-, frequency- or phase- modulated oscillations by converting the oscillations into two quadrature related signals
    • H03D3/008—Compensating DC offsets
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/007—Demodulation of angle-, frequency- or phase- modulated oscillations by converting the oscillations into two quadrature related signals
    • H03D3/009—Compensating quadrature phase or amplitude imbalances
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0041—Functional aspects of demodulators
    • H03D2200/0047—Offset of DC voltage or frequency
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/16—Multiple-frequency-changing
    • H03D7/165—Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
CH432088A 1988-11-22 1988-11-22 CH676404A5 (el)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CH432088A CH676404A5 (el) 1988-11-22 1988-11-22
DE19893938643 DE3938643C2 (de) 1988-11-22 1989-11-21 Verfahren zum Rekonstruieren abgetrennter Gleichspannungsnutzanteile an ZF-Signalen in einem Direct-Conversion-Empfänger und Empfänger zum Durchführen des Verfahrens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH432088A CH676404A5 (el) 1988-11-22 1988-11-22

Publications (1)

Publication Number Publication Date
CH676404A5 true CH676404A5 (el) 1991-01-15

Family

ID=4273885

Family Applications (1)

Application Number Title Priority Date Filing Date
CH432088A CH676404A5 (el) 1988-11-22 1988-11-22

Country Status (2)

Country Link
CH (1) CH676404A5 (el)
DE (1) DE3938643C2 (el)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5212826A (en) * 1990-12-20 1993-05-18 Motorola, Inc. Apparatus and method of dc offset correction for a receiver
US5249203A (en) * 1991-02-25 1993-09-28 Rockwell International Corporation Phase and gain error control system for use in an i/q direct conversion receiver
DE4238543C1 (de) * 1992-11-14 1994-05-05 Hagenuk Telecom Gmbh Verfahren und Vorrichtung zur Korrektur der Phasen- und Amplitudenfehler bei direktmischenden Empfangseinrichtungen
DE4238542C1 (de) * 1992-11-14 1994-06-09 Hagenuk Telecom Gmbh Verfahren und Vorrichtung zur Korrektur von Gleichspannungs-Fehlersignalen bei direktmischenden Empfangseinrichtungen
DE4409474A1 (de) * 1993-09-11 1995-03-16 Blaupunkt Werke Gmbh Amplitudendemodulator
DE4430679C1 (de) * 1994-08-29 1995-12-21 Dataradio Eng & Consult Verfahren und Vorrichtung zur Entzerrung von Signalpaaren
GB2323502B (en) * 1997-03-18 2002-03-27 Ericsson Telefon Ab L M Radio receiver

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE419581B (sv) * 1980-09-12 1981-08-10 Ericsson Telefon Ab L M Anordning i ett radarsystem for korrektion av fas- och amplitudfel, som uppstar i kvadraturdetektorn
US4475088A (en) * 1981-06-04 1984-10-02 Westinghouse Electric Corp. Gain imbalance corrected quadrature phase detector
GB2106734B (en) * 1981-09-15 1986-01-15 Standard Telephones Cables Ltd Radio receiver
DE3346725A1 (de) * 1983-12-23 1985-07-04 Robert Bosch Gmbh, 7000 Stuttgart Kompensationsschaltung fuer datenmodulator
GB2166324A (en) * 1984-10-25 1986-04-30 Stc Plc A multi-mode radio transceiver
GB2175473A (en) * 1985-05-17 1986-11-26 Philips Electronic Associated D.c. block capacitor circuit
US4712563A (en) * 1986-05-28 1987-12-15 Baxter Travenol Laboratories, Inc. Method of and apparatus for determining the diastolic and systolic blood pressure of a patient
GB2193405A (en) * 1986-08-01 1988-02-03 Philips Electronic Associated Demodulating an angle-modulated signal

Also Published As

Publication number Publication date
DE3938643C2 (de) 1999-03-25
DE3938643A1 (de) 1990-05-23

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Legal Events

Date Code Title Description
PL Patent ceased