Low cost power amplifier linearization in an RFID radio...

Details Low cost power amplifier linearization in an RFID radio... Low cost power amplifier linearization in an RFID radio...

2007-12-04

2007-12-04

La, Anh V. (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S010300

Reexamination Certificate

active

11142117

ABSTRACT:
A power amplification system within an RFID reader uses feedback to linearize a transfer function of the system. ASK modulation is used in the system. An envelope of an output signal of a non-linear power amplifier is fed back to an input where it is combined in an integrator with an ASK modulation signal to generate a pre-emphasized modulation signal. The pre-emphasized modulation signal is then applied to the power amplifier to generate a linearized output signal.

REFERENCES:
patent: 6369710 (2002-04-01), Poticny et al.
patent: 7030761 (2006-04-01), Bridgelall et al.
patent: 7148804 (2006-12-01), Salesky et al.

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