Technalogix TAUD-100, Operating Manual

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Technalogix Ltd TAUD-1000 Transmitter
IV-1
Section IV – RF Components
Amplifier Pallets
The UHFTV-50 driver pallet is also a linear class-AB pallet. It has a typical gain of 37dB and draws
no more than 3.0Adc total drain current. The quiescent and drain currents can be measured on the
UHFTV-50 by inserting an ammeter in series with the power supply lead to the pallet or by
measuring the voltage drop across the current sense resistor found directly at the DC power supply
lead input to the pallet. This resistance is 0.01-ohms, providing a 10mV per ampere ratio.
The BLF878 pallets used in the final amplification stage use LDMOS (Laterally Diffused Metal Oxide
Semiconductor) technology. LDMOS technology offers higher gain, efficiency and linearity over
standard MOSFET and Bipolar devices and enhances ruggedness and reliability. LDMOS
transistors have the added advantage of not having BEO (Beryllium Oxide) in their construction.
The BLF878 amplifier pallets have a typical gain of 17dB and draw no more than 25Adc. Currents
for these pallets must be measured with an ammeter in series with the power supply lead.
Each of the amplifier pallets is connectorized to optimize servicing and accessibility