Question

can anyone help with c?

8. Consider the circuit shown in Figure 7. A Q-point value for Ic between a minimum of 4 mA and a maximum of 5 mA is required. Assume that resistor values are constant and that B ranges from 100 to 300. It is desired for RB to have the largest possible value while meeting the othei constraints. (a) Determine the values of RB and RE. (b) Explain the contribution of resistor Re for thermal stabilisation of this circuit (Thermal stabilisation - Variation to Q-point due to tem- perature is minimum. β is highly temperature dependent and in creases with increasing temperature ) c) The circuit shown in Figure 7 has to be modified to use as a common emitter amplifier to amplify a signal Vin - 1 sin(6283t 30°) mV Suggest a suitable circuit showing input and output connections of the signal circuit. Show the value of the capacitors you have selected +15 V VBEQ = 0.7 V Figure 7

Answer 1

\5V Likus tata RE Re-39_ = 0.975m 4 m

Let

に aradttr | 1 md.tu

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