Global Patent Index - EP 0976201 A1

EP 0976201 A1 2000-02-02 - Circuit for frequency conditioning in a radio transceiver working in the UHF range, especially a wireless telephone

Title (en)

Circuit for frequency conditioning in a radio transceiver working in the UHF range, especially a wireless telephone

Title (de)

Schaltung zur Frequenzaufbereitung eines im UHF-Bereich arbeitenden Funk-Sende-Empfängers, insbesondere eines schnurlosen Telefons

Title (fr)

Circuit pour traiter la fréquence d'un émetteur-récepteur radio foncionnant sur la bande UHF, notamment un téléphone sans fil

Publication

EP 0976201 A1 (DE)

Application

EP 99914417 A

Priority

  • DE 9900397 W
  • DE 19805963 A

Abstract (en)

[origin: DE19805963A1] The designed circuit for time division duplex with frequency hopping technique has a total of only two frequency synthesizers (49, 56) for the transmitter and the receiver paths (48, 62) and only one step-up mixer (54) in the transmitter path. The UHF synthesizer frequency is subjected to frequency division before insertion as superimposed frequency of the allocated mixer in the transmitter and receiver paths enabling its utilization for the UHF frequency synthesizer at different frequencies for the transmitter or receiver slot due to the short settling time. One special field of application of the inventive circuit is wireless telephony.

IPC 1-7 (main, further and additional classification)

H04B 1/38

IPC 8 full level (invention and additional information)

H04B 1/44 (2006.01); H04B 1/40 (2006.01); H04J 9/00 (2006.01)

CPC (invention and additional information)

H04B 1/408 (2013.01)

Citation (search report)

See references of WO 9941841A1

Designated contracting state (EPC)

DE FR GB IT

EPO simple patent family

DE 19805963 A1 19990902; DE 19805963 C2 20010222; CN 1130841 C 20031210; CN 1263651 A 20000816; EP 0976201 A1 20000202; JP 2001523431 A 20011120; JP 3754709 B2 20060315; US 6738602 B1 20040518; WO 9941841 A1 19990819

INPADOC legal status


2008-03-05 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20070301

2007-06-06 [RTI1] TITLE (CORRECTION)

- Free text: CIRCUIT FOR FREQUENCY CONDITIONING IN A RADIO TRANSCEIVER WORKING IN THE UHF RANGE, ESPECIALLY A WIRELESS TELEPHONE

2007-05-30 [RTI1] TITLE (CORRECTION)

- Free text: CIRCUIT FOR FREQUENCY CONDITIONING IN A RADIO TRANSCEIVER WORKING IN THE UHF RANGE, ESPECIALLY A WIRELESS TELEPHONE

2001-11-07 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: INFINEON TECHNOLOGIES AG

2000-02-02 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19991005

2000-02-02 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB IT