| University | Singapore University of Social Science (SUSS) |
| Subject | ENG101: Analogue Electronics Design |
ENG101: Analogue Electronics Design Assignment, SUSS, Singapore Draw the DC equivalent circuit and Calculate the Q-point of the transistor
In Figure 1, the MI has lip = 1 mA/V2, VTP = -1 V and = 0.015 V’. Assume that all the capacitors have infinite value, R./ = 50 0, RI = 2 MO, R2 = 0.5 Mcl, RD= 2 kO, Rst = 9 K2, Rs2 = 1 In, RI= 100 K2 and Vss = 15 V. When calculating ID for Mi in saturation region, can ignore the channel length modulation: ./D = ip(I VGSI IVTPD2
(a) Draw the DC equivalent circuit.
(b) Calculate the Q-point of the transistor Mi in Figure 1.
(c) Determine if the transistor Mi is operating in the Saturation region.
(d) Calculate the DC power dissipation of each component of the circuit.
(e) Verify if the total DC power dissipated by the circuit computed in (d) is equal to the total power delivered by Vss
(f) Draw a small-signal equivalent circuit of the amplifier.
(g) Calculate the resistances Rim, Rout of the amplifier.
(h) If vi= 0.1sintut mV, what will be the output voltage vo?
(i) Calculate the current gain Ig
(j) What is the maximum amplitude of the input signal vt for this small-signal analysis to be valid? Will the output waveform of (h) be distorted?
(k) What will be the value of R. to maximize the voltage gain v, of this amplifier?
(1) Without changing the transistor, suggest two effective ways to increase the voltage gain of this amplifier circuit. Please indicate the direction of change if your suggestions involve changes in component values.
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