CH671856A5 - - Google Patents

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Publication number
CH671856A5
CH671856A5 CH357286A CH357286A CH671856A5 CH 671856 A5 CH671856 A5 CH 671856A5 CH 357286 A CH357286 A CH 357286A CH 357286 A CH357286 A CH 357286A CH 671856 A5 CH671856 A5 CH 671856A5
Authority
CH
Switzerland
Prior art keywords
frequency
receiver
mixer
oscillator
mixing
Prior art date
Application number
CH357286A
Other languages
German (de)
English (en)
Inventor
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 CH357286A priority Critical patent/CH671856A5/de
Priority to DE19873726181 priority patent/DE3726181A1/de
Publication of CH671856A5 publication Critical patent/CH671856A5/de

Links

Classifications

    • 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
    • H03D7/161—Multiple-frequency-changing all the frequency changers being connected in cascade
    • H03D7/163—Multiple-frequency-changing all the frequency changers being connected in cascade the local oscillations of at least two of the frequency changers being derived from a single oscillator
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B1/00—Details
    • H03B1/04—Reducing undesired oscillations, e.g. harmonics
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B2200/00—Indexing scheme relating to details of oscillators covered by H03B
    • H03B2200/006—Functional aspects of oscillators
    • H03B2200/007—Generation of oscillations based on harmonic frequencies, e.g. overtone oscillators
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B2200/00—Indexing scheme relating to details of oscillators covered by H03B
    • H03B2200/006—Functional aspects of oscillators
    • H03B2200/0078—Functional aspects of oscillators generating or using signals in quadrature
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B2202/00—Aspects of oscillators relating to reduction of undesired oscillations
    • H03B2202/08—Reduction of undesired oscillations originated from the oscillator in circuit elements external to the oscillator by means associated with the oscillator
    • 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
    • H03D2200/009—Reduction of local oscillator or RF leakage
    • 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)
  • Superheterodyne Receivers (AREA)
  • Noise Elimination (AREA)
CH357286A 1986-09-05 1986-09-05 CH671856A5 (ro)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CH357286A CH671856A5 (ro) 1986-09-05 1986-09-05
DE19873726181 DE3726181A1 (de) 1986-09-05 1987-08-06 Verfahren zum ueberlagerungsempfang eines modulierten signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH357286A CH671856A5 (ro) 1986-09-05 1986-09-05

Publications (1)

Publication Number Publication Date
CH671856A5 true CH671856A5 (ro) 1989-09-29

Family

ID=4258882

Family Applications (1)

Application Number Title Priority Date Filing Date
CH357286A CH671856A5 (ro) 1986-09-05 1986-09-05

Country Status (2)

Country Link
CH (1) CH671856A5 (ro)
DE (1) DE3726181A1 (ro)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4126080C2 (de) * 1990-08-08 2003-04-10 Mitel Semiconductor Ltd Mischersystem für einen Direktumsetzungsempfänger

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4125995A1 (de) * 1991-06-08 1992-12-10 Licentia Gmbh Empfaengeranordnung
WO1998040968A2 (en) * 1997-03-12 1998-09-17 Koninklijke Philips Electronics N.V. A frequency conversion circuit
JP4236059B2 (ja) 1997-03-12 2009-03-11 エヌエックスピー ビー ヴィ 周波数変換回路
DE69930681T2 (de) 1998-01-23 2006-08-31 Matsushita Electric Industrial Co., Ltd., Kadoma Abstimmbarer Demodulator für digital modulierte RF-Signale
JP2001008118A (ja) * 1999-06-22 2001-01-12 Alps Electric Co Ltd デジタルテレビジョンチューナ
TW508901B (en) * 2000-02-02 2002-11-01 Interdigital Tech Corp Direct-conversion modulation with reduced local oscillator leakage

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2742578A1 (de) * 1977-09-22 1979-04-05 Hirschmann Radiotechnik Frequenzumsetzer-einheit mit zwei mischstufen
EP0062872A1 (de) * 1981-04-07 1982-10-20 ANT Nachrichtentechnik GmbH Empfangssystem
GB2170368A (en) * 1985-01-25 1986-07-30 Nec Corp Receiver for mobile communication systems

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2742578A1 (de) * 1977-09-22 1979-04-05 Hirschmann Radiotechnik Frequenzumsetzer-einheit mit zwei mischstufen
EP0062872A1 (de) * 1981-04-07 1982-10-20 ANT Nachrichtentechnik GmbH Empfangssystem
GB2170368A (en) * 1985-01-25 1986-07-30 Nec Corp Receiver for mobile communication systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4126080C2 (de) * 1990-08-08 2003-04-10 Mitel Semiconductor Ltd Mischersystem für einen Direktumsetzungsempfänger

Also Published As

Publication number Publication date
DE3726181A1 (de) 1988-03-10

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Legal Events

Date Code Title Description
PL Patent ceased