Communication semiconductor integrated circuit, a wireless...

Details Communication semiconductor integrated circuit, a wireless... Communication semiconductor integrated circuit, a wireless...

2006-07-25

2006-07-25

Urban, Edward F. (Department: 2685)

Telecommunications

Transmitter

Plural modulation

C455S108000, C455S110000, C375S300000, C375S302000

Reexamination Certificate

active

07082290

ABSTRACT:
A polar-loop wireless communication apparatus includes, on a forward path between an amplitude detector and a power amplifier which constitute an amplitude control loop, a variable gain amplifier and a switch to change characteristics of a loop filter to output a frequency bandwidth of the amplitude control loop to an order less than an order for normal operation. The system is operated with the characteristics set to the lower order to measure outputs from the power amplifier to calibrate the output power of the power transmitter, and the register is operated with the characteristics set to the higher order to measure the open loop gain of the amplitude control. According to results of the calculation, data to correct gain characteristics of the variable gain amplifier with respect to an output control signal is stored in a nonvolatile memory of a baseband circuit.

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