High-Accuracy Gain and Phase Regulation System for Real Time Compensation

Author

Lagutere, Thierry ; Tahmi, Carmen ; Russat, Jean

Author_Institution

Commissariat a l´´Energie Atomique

Volume

1

fYear

2006

fDate

9-13 July 2006

Firstpage

223

Lastpage

227

Abstract

This paper describes a circuit designed to automatically adjust the gain and the phase of a signal processing system. This circuit uses the AD8302 component from analog devices for phase and gain measurement. Additional circuits are included to improve its overall stability (temperature and input power level). As a first step, the compensation system "learns" its actual gain and phase performances. Then, it drives a phase shifter and a VGA (variable gain amplifier) to cancel the measured deviation between the reference and the corresponding actual value. The measurement accuracy of our compensation system for a standard commercial temperature range (0degC to +85degC) is plusmn0.28 dB for gain and plusmn1.15deg for phase when signal frequency is 900 MHz

Keywords

amplifiers; gain measurement; network synthesis; phase measurement; phase shifters; signal processing; 0 to 85 degC; 900 MHz; AD8302; VGA; analog devices; gain measurement; high-accuracy gain; phase measurement; phase regulation system; phase shifter; real time compensation; signal processing system; variable gain amplifier; Circuit stability; Frequency measurement; Gain measurement; Performance gain; Phase measurement; Phase shifters; Real time systems; Signal design; Signal processing; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics, 2006 IEEE International Symposium on

Conference_Location

Montreal, Que.

Print_ISBN

1-4244-0496-7

Electronic_ISBN

1-4244-0497-5

Type

conf

DOI

10.1109/ISIE.2006.295596

Filename

4077927