BR9807179A - Transceptor, e, processo e aparelho para gerar uma frequencia de transmissão em um transceptor contendo um receptor super heteródino - Google Patents
Transceptor, e, processo e aparelho para gerar uma frequencia de transmissão em um transceptor contendo um receptor super heteródinoInfo
- Publication number
- BR9807179A BR9807179A BR9807179-3A BR9807179A BR9807179A BR 9807179 A BR9807179 A BR 9807179A BR 9807179 A BR9807179 A BR 9807179A BR 9807179 A BR9807179 A BR 9807179A
- Authority
- BR
- Brazil
- Prior art keywords
- transceiver
- frequency
- local oscillator
- transmission frequency
- generating
- 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
- H04B1/38—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
- H04B1/405—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency with multiple discrete channels
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Transceivers (AREA)
Abstract
"TRANSCEPTOR, E, PROCESSO E APARELHO PARA GERAR UMA FREQuêNCIA DE TRANSMISSãO EM UM TRANSCEPTOR CONTENDO UM RECEPTOR SUPER HETERóDINO". é descrito um transceptor que gera freq³ência de canal de transmissão e recepção usando um único oscilador de referência a cristal. Um primeiro e segundo oscilador local é conectado ao oscilador de referência a cristal. Um primeiro subconversor é conectado ao primeiro oscilador local, que mistura um sinal de recepção com uma primeira freq³ência de oscilador local para produzir um primeiro sinal de freq³ência intermediária. O primeiro sinal de freq³ência intermediária é então amplificado e filtrado e aplicado a um segundo subconversor que mistura o primeiro sinal de freq³ência intermediária filtrado com uma segunda freq³ência de oscilador local para produzir uma segunda freq³ência intermediária. Um desvio de freq³ência de transmissão é então gerado usando ao segunda freq³ência de oscilador local. Um gerador de freq³ência de transmissão gera uma freq³ência de transmissão usando o desvio de freq³ência de transmissão e a primeira freq³ência de oscilador local.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/795,930 US6009312A (en) | 1997-02-05 | 1997-02-05 | Transmit signal generation with the aid of a receiver |
PCT/US1998/001562 WO1998034341A1 (en) | 1997-02-05 | 1998-01-29 | Transmit signal generation with the aid of a receiver |
Publications (1)
Publication Number | Publication Date |
---|---|
BR9807179A true BR9807179A (pt) | 2000-01-25 |
Family
ID=25166807
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR9807179-3A BR9807179A (pt) | 1997-02-05 | 1998-01-29 | Transceptor, e, processo e aparelho para gerar uma frequencia de transmissão em um transceptor contendo um receptor super heteródino |
Country Status (9)
Country | Link |
---|---|
US (1) | US6009312A (pt) |
EP (1) | EP0958653B1 (pt) |
CN (1) | CN1252182A (pt) |
AU (1) | AU6044998A (pt) |
BR (1) | BR9807179A (pt) |
DE (1) | DE69829555D1 (pt) |
EE (1) | EE9900338A (pt) |
HK (1) | HK1021452A1 (pt) |
WO (1) | WO1998034341A1 (pt) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6308048B1 (en) * | 1997-11-19 | 2001-10-23 | Ericsson Inc. | Simplified reference frequency distribution in a mobile phone |
FR2779890B1 (fr) * | 1998-06-11 | 2000-08-04 | Alsthom Cge Alcatel | Chaine d'emission reception et procede d'emission notamment pour un telephone mobile |
TW408525B (en) * | 1998-10-09 | 2000-10-11 | Ind Tech Res Inst | A transceiver device which could switch rapidly the receiving/transmitting mode |
FR2786056B1 (fr) * | 1998-11-13 | 2000-12-22 | Sagem | Procede de reglage d'un emetteur recepteur multibande de telephonie mobile et telephone mobile ainsi obtenu |
JP2002033675A (ja) * | 2000-07-13 | 2002-01-31 | Sony Corp | マルチバンド送受信用信号発生装置及び方法、並びにマルチバンド無線信号送受信装置 |
US6960962B2 (en) * | 2001-01-12 | 2005-11-01 | Qualcomm Inc. | Local oscillator leakage control in direct conversion processes |
DE60224162T2 (de) * | 2001-01-12 | 2008-12-04 | Qualcomm, Inc., San Diego | Reduktion vom lecksignal eines lokaloszillators in einem direktkonversionsverfahren |
US6845126B2 (en) * | 2001-01-26 | 2005-01-18 | Telefonaktiebolaget L.M. Ericsson (Publ) | System and method for adaptive antenna impedance matching |
US6961368B2 (en) * | 2001-01-26 | 2005-11-01 | Ericsson Inc. | Adaptive antenna optimization network |
FR2845840B1 (fr) * | 2002-10-14 | 2005-09-16 | St Microelectronics Sa | Dispositif radiofrequence du type a frequence intermediaire nulle ou quasi-nulle minimisant la modulation frequentielle parasite appliquee a un oscillateur local integre. |
KR100539874B1 (ko) * | 2003-04-02 | 2005-12-28 | 한국과학기술원 | 무선 송수신장치에서 자가 보상장치 및 방법 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51117510A (en) * | 1975-04-07 | 1976-10-15 | Shintou Denki Kk | Double superheterodyne receiver |
JPS54139316A (en) * | 1978-04-20 | 1979-10-29 | Matsushita Electric Ind Co Ltd | Am ssb transmitter/receiver |
JPH0744485B2 (ja) * | 1987-05-22 | 1995-05-15 | 三菱電機株式会社 | 自動車電話装置 |
US5152005A (en) * | 1990-01-22 | 1992-09-29 | Motorola, Inc. | High resolution frequency synthesis |
US5493710A (en) * | 1991-08-02 | 1996-02-20 | Hitachi, Ltd. | Communication system having oscillation frequency calibrating function |
US5594735A (en) * | 1992-04-10 | 1997-01-14 | Nec Corporation | TDMA mobile unit frequency synthesizer having power saving mode during transmit and receive slots |
FI102798B1 (fi) * | 1992-07-28 | 1999-02-15 | Nokia Mobile Phones Ltd | Digitaalisen matkapuhelimen radiotaajuusosan piirijärjestely |
JPH0715371A (ja) * | 1993-06-25 | 1995-01-17 | Nec Corp | スーパーへテロダイン方式の送受信方法と送受信機 |
FI941862A (fi) * | 1994-04-21 | 1995-10-22 | Nokia Mobile Phones Ltd | Menetelmä ja radiotaajuusjärjestelmä kahden eri taajuusalueella toimivan radioviestinjärjestelmän vastaanottimen ja lähettimen taajuuksien muodostamiseksi ja kahdella eri taajuusalueella toimiva vastaanotin ja lähetin sekä edellisten käyttö matkapuhelimessa |
US5610558A (en) * | 1995-11-03 | 1997-03-11 | Motorola, Inc. | Controlled tracking of oscillators in a circuit with multiple frequency sensitive elements |
US6308048B1 (en) * | 1997-11-19 | 2001-10-23 | Ericsson Inc. | Simplified reference frequency distribution in a mobile phone |
-
1997
- 1997-02-05 US US08/795,930 patent/US6009312A/en not_active Expired - Lifetime
-
1998
- 1998-01-29 DE DE69829555T patent/DE69829555D1/de not_active Expired - Lifetime
- 1998-01-29 EE EEP199900338A patent/EE9900338A/xx unknown
- 1998-01-29 AU AU60449/98A patent/AU6044998A/en not_active Abandoned
- 1998-01-29 BR BR9807179-3A patent/BR9807179A/pt not_active IP Right Cessation
- 1998-01-29 CN CN98803915.XA patent/CN1252182A/zh active Pending
- 1998-01-29 EP EP98903765A patent/EP0958653B1/en not_active Expired - Lifetime
- 1998-01-29 WO PCT/US1998/001562 patent/WO1998034341A1/en active IP Right Grant
-
2000
- 2000-01-18 HK HK00100313A patent/HK1021452A1/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
CN1252182A (zh) | 2000-05-03 |
EE9900338A (et) | 2000-02-15 |
DE69829555D1 (de) | 2005-05-04 |
AU6044998A (en) | 1998-08-25 |
EP0958653B1 (en) | 2005-03-30 |
WO1998034341A1 (en) | 1998-08-06 |
HK1021452A1 (en) | 2000-06-09 |
EP0958653A1 (en) | 1999-11-24 |
US6009312A (en) | 1999-12-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
B08F | Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette] |
Free format text: REFERENTE A 9A E 10A ANUIDADES. |
|
B08K | Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette] |
Free format text: REFERENTE AO DESPACHO PUBLICADO NA RPI 1971 DE 14/10/2008. |