SELECTED RF BLOCKS IN VHDL-AMS
141
LNA1: entity LNA(RF)
generic map (GP_DB => 6.0,
IP3_DBM => -23.0,
FNOISE_DB => 2.5
)
port map (P_IN => N_1,
P_OUT => N_2,
VDD => N_VDD,
GND => ELECTRICAL_REF
);
The complete test bench is included on the CD-ROM that is provided
with this book.
Figure 7-11. Simulation of amplifying a single-tone with nonlinear characteristic
As shown in Figure 7-11 the input signal, which should be doubled in
magnitude (power gain of 6dB), is distorted while passing the LNA. The
effect of the intercept point IP3 (and finally clipping) is a limitation of the
LNA output signal for large input signals. The nonlinear characteristic can
be seen in the second diagram.
Summary :
SELECTED RF BLOCKS IN VHDL-AMS 141 LNA1: entity LNA(RF) generic map (GP_DB => Simulation of amplifying a single-tone with nonlinear characteristic As shown in Figure 7-11 the input signal, which should be doubled in magnitude (power gain of 6dB), is distorted while passing the LNA.
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