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EXERCISE 5.11 If in the circuit of Example 5.5 the value of RD is doubled, find approximate values for ID and VD. Ans. 0.2 mA; 0.05 V Design the circuit in Fig. 5.23 to establish a drain voltage of 0.1 V. What is the effective resistance between drain and source at this operating point? Let Vtn = 1 V and kn’(W/L) = 1 mA/V2. Figure 5.23 Circuit for Example 5.5.

EXERCISE 5.11 If in the circuit of Example 5.5 the value of RD is doubled, find approximate values for ID and VD. Ans. 0.2 mA; 0.05 V Design the circuit in Fig. 5.23 to establish a drain voltage of 0.1 V. What is the effective resistance between drain and source at this operating point? Let Vtn = 1 V and kn’(W/L) = 1 mA/V2. Figure 5.23 Circuit for Example 5.5.

EXERCISE 5.11 If in the circuit of Example 5.5 the value of RD is doubled, find approximate values for ID and VD. Ans. 0.2 mA; 0.05 V Design the circuit in Fig. 5.23 to establish a drain voltage of 0.1 V. What is the effective resistance between drain and source at this operating point? Let Vtn = 1 V and kn’(W/L) = 1 mA/V2. Figure 5.23 Circuit for Example 5.5.

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EXERCISE 5.11 If in the circuit of Example 5.5 the value of RD is doubled, find approximate values for ID and VD. Ans. 0.2 mA; 0.05 V Design the circuit in Fig. 5.23 to establish a drain voltage of 0.1 V. What is the effective resistance between drain and source at this operating point? Let Vtn = 1 V and kn’(W/L) = 1 mA/V2. Figure 5.23 Circuit for Example 5.5.

Explanation & Steps

First of all determine the drain resistance RD for the given operating point conditions of NMOS transistor i.e. VGS = 5 V, VDS = 0.1 V.

After the value of RD is doubled, mode of operation needs to be assumed and with this assumption, new values of VD and ID are calculated.

Finally, mode of operation of NMOS transistor needs to be verified using calculated VD and ID value. If the mode of operation is correct, then VD and ID values are correct. Otherwise, change the mode of operation and repeat the calculation of VD and ID, followed by verification of mode of operation.

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