EP 1095449 A4 20051109 - AMPLIFIER WITH DYNAMICALLY ADAPTABLE SUPPLY CURRENT
Title (en)
AMPLIFIER WITH DYNAMICALLY ADAPTABLE SUPPLY CURRENT
Title (de)
VERTSÄRKER MIT DYNAMISCH ANPASSBAREM VERSORGUNGSSTROM
Title (fr)
AMPLIFICATEUR AVEC COURANT D'ALIMENTATION A ADAPTATION DYNAMIQUE
Publication
Application
Priority
- US 9910439 W 19990507
- US 8077398 A 19980518
- US 8081198 A 19980518
- US 8081298 A 19980518
Abstract (en)
[origin: WO9960698A1] An adaptable DC power consumption circuit (50) is provided with a feedback control loop (78) formed between the power terminal and the control terminal of the RF amplifier (52). A controller (60) influences the feedback control loop to properly set the supply current at the desired minimum level necessary to maintain linear operation of the RF amplifier. The output of the RF amplifier influences the feedback control loop to dynamically vary the supply current from the desired level. Another feedback control loop is formed between the power terminal and a control terminal of a variable voltage supply. The controller influences the feedback control loop to properly set the supply voltage at the desired minimum level necessary to maintain linear operation of the RF amplifier. The output of the RF amplifier influences the feedback control loop to dynamically vary the supply voltage from the desired level. The controller alternately operates the RF amplifier during a high RF output power condition, and bypasses the RF amplifier during a low RF output power condition. In this manner, linear operation of the RF amplifier can be maintained while maximizing the power efficiency of the RF amplifier.
IPC 1-7
IPC 8 full level
H03F 1/02 (2006.01); H03G 3/20 (2006.01); H03G 3/30 (2006.01)
CPC (source: EP)
H03F 1/0211 (2013.01); H03F 1/0216 (2013.01); H03F 1/0244 (2013.01); H03F 1/0255 (2013.01); H03F 1/0272 (2013.01); H03F 1/0277 (2013.01); H03G 3/004 (2013.01); H03G 3/3042 (2013.01); H03F 2200/504 (2013.01)
Citation (search report)
- [XY] US 5497125 A 19960305 - ROYDS IAN D [GB]
- [X] EP 0772292 A2 19970507 - ROKE MANOR RESEARCH [GB]
- [Y] US 5420536 A 19950530 - FAULKNER MICHAEL [AU], et al
- [Y] US 5422598 A 19950606 - MAEDA TADAHIKO [JP], et al
- [XY] US 4994757 A 19910219 - BICKLEY ROBERT H [US], et al
- [X] EP 0675605 A2 19951004 - NOKIA MOBILE PHONES LTD [FI]
- [X] US 4320350 A 19820316 - DRAPAC MICHAEL J
- [XY] US 5661434 A 19970826 - BROZOVICH R STEVEN [US], et al
- See references of WO 9960698A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9960698 A1 19991125; AU 3985399 A 19991206; EP 1095449 A1 20010502; EP 1095449 A4 20051109
DOCDB simple family (application)
US 9910439 W 19990507; AU 3985399 A 19990507; EP 99922981 A 19990507