PRESERVING LINEARITY OF AN ISOLATOR-FREE POWER AMPLIFIER BY DYNAMICALLY ADJUSTING BIAS AND SUPPLY OF ACTIVE DEVICES - Patent 1573905

(19)

(11)

EP 1 573 905 A1

(12)

(43)	Date of publication:
	14.09.2005 Bulletin 2005/37

(21)	Application number: 03778618.3

(22)	Date of filing: 10.12.2003

(51)	International Patent Classification (IPC)⁷: H03F 1/52, H03F 1/56

(86)	International application number:
	PCT/IB2003/005939

(87)	International publication number:
	WO 2004/054096 (24.06.2004 Gazette 2004/26)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
	Designated Extension States:
	AL LT LV MK

(30)

Priority:

12.12.2002 US 432939 P

(71)	Applicant: Koninklijke Philips Electronics N.V.
	5621 BA Eindhoven (NL)

(72)	Inventors:
	OSMAN, Saleh Briarcliff Manor, NY 10510-8001 (US) KEENAN, Richard, F. Briarcliff Manor, NY 10510-8001 (US) LUCEK, Jaroslaw Briarcliff Manor, NY 10510-8001 (US)

(74)	Representative: Eleveld, Koop Jan
	Philips Intellectual Property & Standards, P.O. Box 220 5600 AE Eindhoven 5600 AE Eindhoven (NL)

(54)	PRESERVING LINEARITY OF AN ISOLATOR-FREE POWER AMPLIFIER BY DYNAMICALLY ADJUSTING BIAS AND SUPPLY OF ACTIVE DEVICES