(19)
(11)EP 2 884 586 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
15.07.2015 Bulletin 2015/29

(43)Date of publication A2:
17.06.2015 Bulletin 2015/25

(21)Application number: 14182150.4

(22)Date of filing:  23.06.2005
(51)Int. Cl.: 
H01Q 11/12  (2006.01)
H04B 1/48  (2006.01)
H03F 3/217  (2006.01)
H04B 1/04  (2006.01)
H03G 3/30  (2006.01)
(84)Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR

(30)Priority: 23.06.2004 US 875405
22.06.2005 US 158597

(62)Application number of the earlier application in accordance with Art. 76 EPC:
05763216.8 / 1774620

(71)Applicant: PEREGRINE SEMICONDUCTOR CORPORATION
San Diego, CA 92121 (US)

(72)Inventors:
  • Burgener, Mark L.
    San Diego, CA California 92107 (US)
  • Cable, James S.
    Del Mar, CA California 92014 (US)

(74)Representative: Richards, John et al
Ladas & Parry LLP
Temple Chambers 3-7 Temple Avenue London EC4Y 0DA
Temple Chambers 3-7 Temple Avenue London EC4Y 0DA (GB)

  


(54)INTERGRATED RF FRONT END


(57) A monolithic integrated circuit (IC), and method of manufacturing same, that includes all RF front end or transceiver elements for a portable communication device, including a power amplifier (PA), a matching, coupling and filtering network, and an antenna switch to couple the conditioned PA signal to an antenna. An output signal sensor senses at least a voltage amplitude of the signal switched by the antenna switch, and signals a PA control circuit to limit PA output power in response to excessive values of sensed output. Preferred fabrication techniques include stacking multiple FETs to form switching devices. An iClass PA architecture is described that dissipatively terminates unwanted harmonics of the PA output signal. A preferred embodiment of the RF transceiver IC includes two distinct PA circuits, two distinct receive signal amplifier circuits, and a four-way antenna switch to selectably couple a single antenna connection to any one of the four circuits.