Title :
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
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;
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
DOI :
10.1109/ISIE.2006.295596
