Design and Realization of Power Saving Unit for a VHF Radio
Baoliang B. Wang · Telecommunication Engineering · 2011
In order to realize power saving of portable VHF radio,a power saving alteration plan is proposed for a radio based on reducing static and dynamic power consumption.The static power consumption is reduced through improving frequency synthesizer circuit.The dynamic power consumption is reduced through adaptive control of transmitted power,which is realized by using embedded technology and digital resistance to make radio automatically adjust the transmitted power according to the received signal level,meanwhile the nonlinear problem between transmission loss,communication distance and digital resistance is solved.Practical measurement shows that the static power consumption is reduced 40% and the dynamic power consumption 16%～58% under condition that the radio′s performance remains unchanged.The design philosophy and technique can be referenced by similar power saving improvement and design.