Mixed RF Output Power Control for Low Power Transmitters in Mobile Cellular Terminals

Abstract

This paper proposes a more precise way of raReference diofrequency output power control and sensing for mobile base supplyI signal station transmitters without increasing the complexity of the AGC of heir power amplifier in order to overcome the design PDC adjustment problems and the production ones. The solution Transducer presented is based on measuring both the output power RF and It the current consumption of the PA. The solution has been tested on commercial GSM triple-band fixed cellular terminals PA and prototypes of 3G power amplifiers. PRF

Wideband automatic level control circuit for wideband signal generator application

“…But the accuracy of ALC is limited by the digit of the digital attenuator. Reference [7]- [11] presents a closed-loop ALC using analog attenuator in transmitters which provides high accuracy, but the operating frequency band is not broad enough.…”

“…The ALC circuit ranges from 3GHz to 6GHz with large dynamic range of 28dB and good output power variation lower than 0.1dB. The ALC circuit designed has broader frequency band than that in reference [7]- [11] and better accuracy than that in reference [3]- [6]. The measured results show that the developed ALC loop circuit is good enough to be applied into the output power control for signal generator in microwave frequency band.…”