Wideband Amplification: Parallel Resistive Feedback
Let us consider a two-port network with parallel feedback that consists of normalized impedance its normalized admittance matrix is expressed in its simple form as
So the scattering matrix of the two-port network with feedback is:
If we use the simplified model of the transistor as defined in section 18.104.22.168, the following results are obtained:
– Resistive feedback
In this case, y = g resistive.
The equations are expressed as:
Low-frequency matching is obtained when canceling S11 and S22 when p → 0.
Simultaneous matching is only possible if Z0gd 1.
Under these conditions:
As we report this condition in the equations, the low-frequency ...