BR0114908A - transceptor de freqüência intermediária nula - Google Patents

transceptor de freqüência intermediária nula

Info

Publication number
BR0114908A
BR0114908A BRPI0114908-3A BR0114908A BR0114908A BR 0114908 A BR0114908 A BR 0114908A BR 0114908 A BR0114908 A BR 0114908A BR 0114908 A BR0114908 A BR 0114908A
Authority
BR
Brazil
Prior art keywords
frequency
intermediate frequency
output
transceiver
transmission
Prior art date
Application number
BRPI0114908-3A
Other languages
English (en)
Inventor
Puay Hoe See
Paul E Peterzell
Brett C Walker
Original Assignee
Qualcomm 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 Qualcomm Inc filed Critical Qualcomm Inc
Publication of BR0114908A publication Critical patent/BR0114908A/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/30—Circuits for homodyne or synchrodyne receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/403—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transceivers (AREA)
  • Devices For Checking Fares Or Tickets At Control Points (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Transmitters (AREA)

Abstract

"TRANSCEPTOR DE FREQüêNCIA INTERMEDIáRIA NULA". Um transmissor e um receptor de Freqüência Intermediária (IF) nula são implementados dentro de um transceptor de modo a se eliminar a interferência na banda de recepção. Uma saìda de um alto oscilador sintonizável para gerar uma fonte de freqüência que é um múltiplo de número inteiro da freqüência de transmissão desejada do LO. A fonte de freqüência é acoplada a um limitador de amplitude e um divisor de freqüência. A saída do divisor de freqüência é empregada como o LO de transmissão para converter para transmissão diretamente sinais de banda base na freqüência de saída desejada sem necessidade de um estágio de FI. A conversão para transmissão direta dos sinais de transmissão de banda base sem um estágio de FI elimina produtos de freqüência espúrios que são produzidos na banda de recepção.
BRPI0114908-3A 2000-10-26 2001-10-24 transceptor de freqüência intermediária nula BR0114908A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US69777900A 2000-10-26 2000-10-26
PCT/US2001/050894 WO2002049224A2 (en) 2000-10-26 2001-10-24 Zero if transceiver

Publications (1)

Publication Number Publication Date
BR0114908A true BR0114908A (pt) 2006-05-09

Family

ID=24802498

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0114908-3A BR0114908A (pt) 2000-10-26 2001-10-24 transceptor de freqüência intermediária nula

Country Status (9)

Country Link
EP (1) EP1329029A2 (pt)
JP (1) JP2004521532A (pt)
KR (1) KR20030044043A (pt)
CN (1) CN1547807A (pt)
AU (1) AU2002243396A1 (pt)
BR (1) BR0114908A (pt)
CA (1) CA2426934A1 (pt)
MX (1) MXPA03003663A (pt)
WO (1) WO2002049224A2 (pt)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008252249A (ja) * 2007-03-29 2008-10-16 Mitsubishi Electric Corp 衛星通信用地上局装置
JP4914283B2 (ja) * 2007-04-20 2012-04-11 日本無線株式会社 周波数シンセサイザ回路
KR20120017071A (ko) * 2009-05-15 2012-02-27 시티에스 코포레이션 고성능 ｒｆ ｒｘ 모듈
TWI616067B (zh) * 2016-10-14 2018-02-21 瑞昱半導體股份有限公司 雙模訊號收發裝置與其方法
CN107786240B (zh) * 2017-10-12 2019-10-15 安徽白鹭电子科技有限公司 多重载波频率跳变的数字通信电台装置
CN113890561B (zh) * 2021-11-17 2023-07-21 歌尔科技有限公司 一种电子设备及其射频电路

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI112133B (fi) * 1996-03-29 2003-10-31 Nokia Corp Menetelmä kahdella eri taajuuusalueella toimivan radioviestinjärjestelmän suoramuunnoslähetin/vastaanottimen taajuuksien muodostamiseksi ja kahdella taajuusalueella toimivan radioviestinjärjestelmänsuoramuunnoslähetin/vastaanotin sekä edellisten käyttö matkaviestimessä
JP3475037B2 (ja) * 1997-03-14 2003-12-08 株式会社東芝 無線機

Also Published As

Publication number Publication date
WO2002049224A2 (en) 2002-06-20
WO2002049224A3 (en) 2003-03-13
KR20030044043A (ko) 2003-06-02
MXPA03003663A (es) 2004-05-04
CA2426934A1 (en) 2002-06-20
EP1329029A2 (en) 2003-07-23
AU2002243396A1 (en) 2002-06-24
JP2004521532A (ja) 2004-07-15
CN1547807A (zh) 2004-11-17

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