06731168 is referenced by 20 patents.

A power amplifier linearizer (

12

) includes an on-chip portion (

60

) and an external controller (

22

). The on-chip portion (

60

) implements two predistortion circuits (

86, 88

) desirably configured as look-up tables. One predistortion circuit (

88

) is programmed by the external controller (

22

) to apply a hotter linearizing translation function (

54

) and the other predistortion circuit (

86

) is programmed by the external controller (

22

) to apply a colder linearizing translation function (

56

). One or more temperature signals (

24, 38

) are correlated with the temperatures experienced by a power amplifier (

34

) and drive a power amplifier thermal modeler (

50

) implemented in the controller (

22

). As a result of running the thermal modeler (

50

), the controller (

22

) generates an interpolation signal (

26

) that indicates how far to interpolate between the hotter and colder translation functions (

54, 56

).

Title
Power amplifier linearizer that compensates for long-time-constant memory effects and method therefor
Application Number
10/71736
Publication Number
6731168 (B2)
Application Date
February 6, 2002
Publication Date
May 4, 2004
Inventor
Eric M Brombaugh
Mesa
AZ, US
James A Sills
Scottsdale
AZ, US
David J Hedberg
Menlo Park
CA, US
Agent
Meshkow & Gresham
US
Agent
Jordan M Meschkow
US
Lowell W Gresham
US
Assignee
Intersil Americas
AZ, US
IPC
H03F 1/30
View Original Source