<Li> Operating point stabilized against shift in temperature . </Li> <Ul> <Li> In this circuit, to keep I independent of β the following condition must be met: </Li> </Ul> <Li> In this circuit, to keep I independent of β the following condition must be met: </Li> <Dl> <Dd> <Dl> <Dd> I c = β I b = β V c c 1 + R 1 / R 2 − V b e (β + 1) R e + R 1 ∥ R 2 ≈ V c c 1 + R 1 / R 2 − V b e R e, (\ displaystyle I_ (c) = \ beta I_ (b) = \ beta (\ frac ((\ frac (V_ (cc)) (1 + R_ (1) / R_ (2))) - V_ (be)) ((\ beta + 1) R_ (e) + R_ (1) \ parallel R_ (2))) \ approx (\ frac ((\ frac (V_ (cc)) (1 + R_ (1) / R_ (2))) - V_ (be)) (R_ (e))),) </Dd> </Dl> </Dd> </Dl>

Different kind of biasing circuits used in bjt applications