MOSFET high frequency amplifier circuit diagram

Published:2011/3/30 22:20:00 Author:Ecco | Keyword: high frequency amplifier | From:SeekIC

The preamplifier(1) ＶＨＦ high frequency amplifier circuit of unipole gate polar MOS FET is based on Bipolar Transistor, but mostly replaced by the ＦＥＴ now. Figure 2-1 is its typical circuitry, ２ＳＫ２４１(Toshiba) adopts FET to increase its gaining power to ２８ｄＢ（＠１００ＭＨz). And it is suitable for ＶＨＦ receiver to amplifier its frequency class. As been zero bias on operating point, the structure of the circuitry is simple, the whole components is 6. Figure ２－１shows a inductance and capacitance which can apply in different kinds of high frequency amplifiers. When the polar current is 9mA, the current will keep constant with the voltage in the range of 6~12V.



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