May I know how the linearity get affected when multiple gain stages are cascaded?
For example: say I have two gain stages of gain G1 and G2 and their linearity numbers (iIP3) are iIP3_1 and iIP3_2. When cascaded, the resultant gain would become G1*G2, may I know what the resultant linearity would be?
That is if you want to work continuously in the linear region
Otherwise....the resultant linearity of overall 1 dB compression point or the 3rd order IP for a cascade of n stage (each having gain Gn and P1dB - or IP3- Pn) is given by: