how to use 2n3904 in multisim
Hi
Design starts with the statement of the specification: for example u may wish to design a single stage transistor having gain 100 output resistance 1kΩ and input resistance 100kΩ. Then, assuming u choose to use a silicon BJT transistor, U could proceed to pick a suitable operating point, voltage supply, bypass and coupling capacitors, and finally circuit topology. Form these, a batch of requirements is obtained for the transistor to satisfy, like a minimum of beta, a minimum of Ic, a minimum of power dissipation capability, and a minimum of Ft. considering these, you could choose a transistor. However being familiar with the popular transistors may help U a lot because not every transistor might be available at a reasonable cost. Also, remember that operating the transistor at the verge of its power dissipation capability might not be a good idea so use transistor at least with two times power.