Determination of the show-stopper values of feedback elements¶
The figure below shows a concept of a negative feedback voltage amplifier with resistive feedback. The amplifier is driven from a voltage source with a source resistance \(R_s=600\Omega\). The voltage gain of this amplifier should be 20dB, while its noise figure should be better than 2dB.
Give the maximum value of the feedback resistors.
The maximum value of the feedback resistors is determined by their noise contribution. This contribution should not result in a noise figure larger than 2 dB.