Amplifier II: The specifications and technological parameters are given in figure 03. The calculated design space for this set of specifications is shown in figure 04, the green line represents the maximum allowable gain versus channel length for the specified technological parameters. The red curves represent constant cutoff frequency transistors for fT= fT(min). The blue curve corresponds to fT = fTmax. The cyan line represents the minimum drain current. The yellow region represents the design space, i. e., the region for which the specs are met. By selecting a point, all its characteristics are displayed at the right side of the screen. Fig. 03. Specifications an technological parameters for Amplifier II. Fig. 04 Design space for the specifications of figure 03. Amplifier I - Amplifier II - Current Mirror - Tranconductor - CS Amplifier