EP 1204904 A1 20020515 - NARROW BAND SCANNING RF RECEIVER
Title (en)
NARROW BAND SCANNING RF RECEIVER
Title (de)
SCHMALBANDIG ABTASTENDER RF EMPFÄNGER
Title (fr)
RECEPTEUR RF A BALAYAGE DE FREQUENCE SUR BANDE ETROITE
Publication
Application
Priority
- US 0020558 W 20000728
- US 14662099 P 19990730
Abstract (en)
[origin: WO0109691A1] The narrow band scanning RF receiver (12) includes a ph ase-locked loop radio frequency stage having a reference oscillator (38) for receiving a radio frequency signal. The radio frequency stage has a frequency which may be selected by a controller via a selectable frequency signal supplied to the reference oscillator (38). The controller tests for the presence of a legitimate radio frequency signal and also temporarily inhibits the tuned radio frequency stage when changing from a first selected frequency to a second selected frequency. The receiver (12) produces an output for controlling an electric motor (100) for operating a barrier.
[origin: WO0109691A1] The narrow band scanning RF receiver (12) includes a ph ase-locked loop radio frequency stage having a reference oscillator (38) for receiving a radio frequency signal. The radio frequency stage has a frequency which may be selected by a controller via a selectable frequency signal supplied to the reference oscillator (38). The controller tests for the presence of a legitimate radio frequency signal and also temporarily inhibits the tuned radio frequency stage when changing from a first selected frequency to a second selected frequency. The receiver (12) produces an output for controlling an electric motor (100) for operating a barrier.
IPC 1-7
IPC 8 full level
H03J 7/28 (2006.01)
CPC (source: EP)
H03J 7/285 (2013.01)
Citation (search report)
See references of WO 0109691A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 0109691 A1 20010208; WO 0109691 A9 20020718; AU 6498300 A 20010219; CA 2380103 A1 20010208; EP 1204904 A1 20020515; MX PA02001112 A 20020820
DOCDB simple family (application)
US 0020558 W 20000728; AU 6498300 A 20000728; CA 2380103 A 20000728; EP 00952251 A 20000728; MX PA02001112 A 20000728