7
Biasing and Operation
The AMMP-6232 is normally biased with a positive drain
supply connected to the VDD pin and a negative gate
bias through bypass capacitors as shown in Figure 19. The
recommended drain supply voltage is 4 V and the gate
bias is approximately -0.95V to get the corresponding
drain current of 138mA. It is important to have 0.1uF
bypass capacitors and the capacitor should be placed
as close to the component as possible. Aspects of the
amplier performance may be improved over a narrower
bandwidth by application of additional conjugate,
linearity, or low noise (Topt) matching.
After adjusting the gate bias to obtain 138mA at Vdd = 4V,
the AMMP-6232 can be safely biased at 3V or 5V (while
xing the gate bias) as desired. At 4V, the performance is
an optimal compromise between power consumption,
gain and power/linearity. It is both applicable to be used
as a low noise block or driver. At 3V, the amplier is ideal
as a front end low noise block where linearity is not highly
required. At 5V, the amplier can provide 1 to 2dBm more
output power for LO or transmitter driver applications
where high output power and linearity are often required.
Refer the Absolute Maximum Ratings table for allowed DC
and thermal conditions.
Figure 19. Usage of the AMMP-6232
AMMP-6232 Application and Usage
Figure 20. Evaluation/Test Board (available to qualied customer request)
Figure 21. Simplied AMMP-6232 Schematic
Top View
Package base: GND
Vdd
OUT
IN
123
4
5
67
8
0.1uF
Vg
~ -0.95V
0.1uF
100pF
100pF
Out
In
Matc hing
Network
Ma tc hing
Network
Matc hing
Ne twork
Vg1
Vg2
