Q. Biasing the BJT?

A simple method of biasing the BJT is shown in Figure. While no general biasing procedure that will work in all cases can be outlined, a reasonable approach is to assign 1/2 V_CC as the drop across the transistor, 3/8 V_CC as the drop across RC to allowan adequate ac voltage swing capability in the collector circuit, and 1/8 V_CC as the drop across RE, so that RE is about 1/3 R_C. With a speci?ed supply voltage V_CC, biasing consists mainly of selecting values for V_CEQ, I_CQ, and I_BQ =  I_CQ/β, which de?ne the operating Q point. One can then select