Global Patent Index - EP 0995273 A2

EP 0995273 A2 2000-04-26 - AM QUALITY DETECTOR

Title (en)

AM QUALITY DETECTOR

Title (de)

QUALITÄTSDETEKTOR FÜR AM

Title (fr)

DETECTEUR DE QUALITE DE MODULATION D'AMPLITUDE (AM)

Publication

EP 0995273 A2 (EN)

Application

EP 99905127 A

Priority

  • EP 99905127 A
  • EP 98200938 A
  • IB 9900382 W

Abstract (en)

[origin: WO9949581A2] During an automatic scanning of an AM frequency band it is required that the scanning is only stopped when a usable audio signal is received. To achieve this normally the receiver checks the (RF) signal level and the IF frequency of the received signal. Because at night the propagation of AM signals is improved as a consequence of the weather conditions it is possible that a far away station having the same transmitting fequency interferes with a local station. To overcome this a detector and receiver are proposed whereby the detector detects interferences of two or more stations and supplies a detection signal resulting in resuming scanning for a next station.

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

H04B 1/10

IPC 8 full level (invention and additional information)

H04B 17/00 (2006.01); H03J 7/04 (2006.01); H04B 1/10 (2006.01); H04B 1/16 (2006.01)

CPC (invention and additional information)

H04B 1/1027 (2013.01); H03J 7/04 (2013.01)

Citation (search report)

See references of WO 9949581A3

Designated contracting state (EPC)

DE FR GB

EPO simple patent family

WO 9949581 A2 19990930; WO 9949581 A3 20000106; CN 1273714 A 20001115; EP 0995273 A2 20000426; JP 2002500850 A 20020108; KR 20010012983 A 20010226

INPADOC legal status


2001-07-18 [18W] APPLICATION WITHDRAWN

- Date of withdrawal: 20010525

2000-04-26 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19991227

2000-04-26 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): DE FR GB