(Nov 20 2012)
PSA4-5043. The coupling capacitora are 1uF
multilayer ceramic and the inductor that supplies
DC to the chip is two series connected inductors.
one is 100uH, the other is 6.8 uH.
This amplifier works from 100 kHz to 1300 MHz and
probably higher but I have no instruments th check that.
The 6.8 uH inductor forms a series resonator with
the parallel capacitance of the big inductor at
That resonance is completely eliminated with the
two 100 ohm resistors.
One parallel with each inductor.
The two ground connections of the chip is soldered
to a 3 mm wide copper foil that stands up from the
PSA4-5043. Input impedance and forward gain.
PSA4-5043. Output impedance and reverse isolation.