EP 1346473 A4 20040804 - FEED-FORWARD AMPLIFIER LOOP CONTROL UTILIZING IF SIGNAL PROCESSING
Title (en)
FEED-FORWARD AMPLIFIER LOOP CONTROL UTILIZING IF SIGNAL PROCESSING
Title (de)
VORWÄRTSKOPPLUNGS-VERSTÄRKERREGELSCHLEIFE MIT ZF-SIGNALVERARBEITUNG
Title (fr)
COMMANDE DE BOUCLE D'AMPLIFICATEUR A CORRECTION AVAL FAISANT INTERVENIR LE TRAITEMENT DE SIGNAL A FREQUENCE INTERMEDIAIRE
Publication
Application
Priority
- US 0150336 W 20011221
- US 25766100 P 20001222
Abstract (en)
[origin: WO02052718A2] An amplifier arrangement including a main amplifier to which feed-forward cancellation is applied, where the amplifier arrangement comprises an input for receiving signals to be amplified, an output for providing an amplified input signal, a pilot signal modulation circuit to generate a CW frequency shifted pilot signal, a mixer down for converting the pilot signal to an IF signal, and a sampling circuit for digitally sampling the IF signal. The amplifier arrangement includes a signal cancellation loop and a distortion cancellation loop each acting as an independent control function for minimizing pilot signal. The signal cancellation loop utilizes a Cartesian loop method for controlling the signal cancellation loop for sensing both phase and amplitude information simultaneously. The Cartesian loop uses a high frequency active mixer, which is a dual cross coupled differential pairs of devices capable of operating with input signals from near DC to 2.4 GHz, for control of the signal cancellation loop.
IPC 1-7
IPC 8 full level
H03F 1/32 (2006.01)
CPC (source: EP KR)
H03F 1/26 (2013.01 - KR); H03F 1/3229 (2013.01 - EP)
Citation (search report)
- [X] EP 0982850 A1 20000301 - LUCENT TECHNOLOGIES INC [US]
- [X] US 5999048 A 19991207 - ZHOU WILLIAM WEI [US]
- See references of WO 02052717A2
Designated contracting state (EPC)
DE GB
DOCDB simple family (publication)
WO 02052718 A2 20020704; CN 1483242 A 20040317; EP 1346473 A2 20030924; EP 1346473 A4 20040804; KR 20030090616 A 20031128; TW 525344 B 20030321; WO 02052717 A2 20020704; WO 02052717 A3 20030403
DOCDB simple family (application)
US 0150560 W 20011222; CN 01821146 A 20011221; EP 01991548 A 20011221; KR 20037008378 A 20030620; TW 90132096 A 20011221; US 0150336 W 20011221