System and method for compensating for the effects of aging...

Details System and method for compensating for the effects of aging... System and method for compensating for the effects of aging...

2008-09-09

2008-09-09

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including temperature compensation means

C330S296000

Reexamination Certificate

active

11293368

ABSTRACT:
Disclosed is a system and method for compensating for the effects of aging and temperature on the performance of transistors in an RF transmitter. The system and method use a temperature-based polynomial and a feedback control loop to correlate the drain current of each transistor with the desired performance characteristics of each transistor. The present invention measures drain current and temperature of the transistor; compares the measured drain current with the desired drain current, which corresponds to the desired performance characteristics; computes a transistor bias voltage based on the temperature and a control parameter, wherein the control parameter is adjustable based on the measured drain current; and applies the bias voltage to the transistor. The process may be repeated, with the control parameter adjusted with each iteration, until the desired drain current is reached.

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Kolbe, Werner, European Search Report, European Patent Office, Dec. 18, 2007, Munich.

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