For the circuit shown in Figure P5.61, the bias voltages are changed to \(V^{+}=3 \mathrm{~V}\) and \(V^{-}=-3 \mathrm{~V}\).

(a) Design a bias-stable circuit for \(\beta=120\) such that \(V_{C E Q}=2.8 \mathrm{~V}\). Determine \(I_{C Q}, R_{1}\), and \(R_{2}\).

(b) If the resistors \(R_{1}\) and \(R_{2}\) vary by \(\pm 5\) percent, determine the range in \(I_{C Q}\) and \(V_{C E Q}\). Plot the various \(Q\)-points on the load line.

Transcribed Image Text:

Cc Figure P5.61 ww www V+=+6 V Rc=2 k R R RE=200 2 V-=-6 V