The BLF548 is a balanced N-channel enhancement mode vertical D-MOS transistor in a SOT262 package, especially designed for use in wideband amplifiers up to 500 MHz. The transistor is capable to deliver 150 W nominal output power at a supply voltage of 28 Volts. Due to the low output capacitance the attainable bandwidth will exceed 300 MHz.
A balanced transistor was chosen in order to reduce the second harmonic from transmitter (due to the push-pull effect) and to reduce the number of required components. The criteria for chosen MOSFETs over bipolar transistors are; high power gain, high load mismatch capabilities, low noise and easy biasing.
Schematic Circuit
Printed Circuit Board (PCB) and Layout
Download BLF548 Application Note
A balanced transistor was chosen in order to reduce the second harmonic from transmitter (due to the push-pull effect) and to reduce the number of required components. The criteria for chosen MOSFETs over bipolar transistors are; high power gain, high load mismatch capabilities, low noise and easy biasing.
Schematic Circuit
Printed Circuit Board (PCB) and Layout
Download BLF548 Application Note
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