80_W_PEP_3_30_MHz_125_136_V_AMPLIFIER

Published:2009/7/7 7:39:00 Author:May | From:SeekIC

This amplifier utilizes a 2N6367 and a pair of 2N6368 transistors. The 2N6367 transistor is employed as a driver and is specified for up to 9 W (PEP) output. In the amplifier design the driver must supply on 5 W (PEP) at 30 MHz with a resulting IMD performance of about -37 to -38 dB. At lower operating fre-quencies, drive requirements drop to the 2-3 W (PEP) range and IMD performance improves to better than 40 dB. Two 2N6368 transistors are employed in the final stage of the transmitter design in a push-pull configuration. These devices are rated at 40 MI (PEP) and -30 dB maximum IMD, although -35 dB per-formance is more typical for narrowband operation. Without frequency compensation, the completed amplifier can deliver 90W (PEP) in the 25-30 MHz band with IMD performance down -30 dB. If only the power amplifier stage is frequency compensated, 95 W (PEP) can be obtained at 6- 10 MHz.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Amplifier_Circuit/80_W_PEP_3_30_MHz_125_136_V_AMPLIFIER.html

Print this Page | Comments | Reading(3)