BR0114908A - transceptor de freqüência intermediária nula - Google Patents
transceptor de freqüência intermediária nulaInfo
- 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
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)
- Radar Systems Or Details Thereof (AREA)
- Devices For Checking Fares Or Tickets At Control Points (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.
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)
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 |
CN202586956U (zh) * | 2009-05-15 | 2012-12-05 | Cts公司 | 高性能射频频分双工接收模块 |
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)
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 |
-
2001
- 2001-10-24 BR BRPI0114908-3A patent/BR0114908A/pt unknown
- 2001-10-24 JP JP2002550413A patent/JP2004521532A/ja active Pending
- 2001-10-24 WO PCT/US2001/050894 patent/WO2002049224A2/en not_active Application Discontinuation
- 2001-10-24 AU AU2002243396A patent/AU2002243396A1/en not_active Abandoned
- 2001-10-24 EP EP01989291A patent/EP1329029A2/en not_active Withdrawn
- 2001-10-24 CA CA002426934A patent/CA2426934A1/en not_active Abandoned
- 2001-10-24 MX MXPA03003663A patent/MXPA03003663A/es unknown
- 2001-10-24 CN CNA018213472A patent/CN1547807A/zh active Pending
- 2001-10-24 KR KR10-2003-7005791A patent/KR20030044043A/ko not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
WO2002049224A2 (en) | 2002-06-20 |
CA2426934A1 (en) | 2002-06-20 |
MXPA03003663A (es) | 2004-05-04 |
EP1329029A2 (en) | 2003-07-23 |
AU2002243396A1 (en) | 2002-06-24 |
WO2002049224A3 (en) | 2003-03-13 |
JP2004521532A (ja) | 2004-07-15 |
KR20030044043A (ko) | 2003-06-02 |
CN1547807A (zh) | 2004-11-17 |
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