EP 1805896 A1 20070711 - SIGNAL STRENGTH INDICATOR
Title (en)
SIGNAL STRENGTH INDICATOR
Title (de)
SIGNALSTÄRKENINDIKATOR
Title (fr)
INDICATEUR DE PUISSANCE DE SIGNAL
Publication
Application
Priority
- IB 2005053342 W 20051011
- EP 04300684 A 20041018
- EP 05788893 A 20051011
Abstract (en)
[origin: WO2006043206A1] A signal processing circuit has an analog to digital converter (31) for providing a digital signal to a processor (15) from an analog input signal that is susceptible to variations in signal power, e.g. from a radio front end (12). The device has a variable gain amplifier (13) controlled by a gain control signal based on detected signal strength. The analog to digital converter has a loop comprising a loop filter for processing the input signal. A signal strength detection circuit (32) is provided for generating the gain control signal, which signal strength detection circuit has loop signal detector for detecting the signal strength from the loop. Hence a received signal strength indicator RSSI is directly coupled to the analog to digital converter (31), avoiding the delay of signal strength detection in the digital processor.
IPC 8 full level
H03M 3/04 (2006.01)
CPC (source: EP)
H03M 3/486 (2013.01); H03M 3/452 (2013.01); H03M 3/49 (2013.01)
Citation (search report)
See references of WO 2006043206A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2006043206 A1 20060427; CN 101044683 A 20070926; CN 101044683 B 20110112; EP 1805896 A1 20070711; JP 2008517510 A 20080522
DOCDB simple family (application)
IB 2005053342 W 20051011; CN 200580035546 A 20051011; EP 05788893 A 20051011; JP 2007536327 A 20051011