3.8 Exercises

Analysis Problems

1. For the circuit of Figure 3.8.1 , determine 𝐼_𝐷, 𝑉_𝐺 and 𝑉_𝐷. 𝐼_𝐷𝑆𝑆 = 20 mA, 𝑉_{𝐺𝑆(𝑜𝑓𝑓)} = −6 V, 𝑉_𝐷𝐷 = 15 V, 𝑅_𝐺 = 470 k Ω , 𝑅_𝑆 = 1.2 k Ω , 𝑅_𝐷 = 1.8 k Ω .
2. For the circuit of Figure 3.8.1 , determine 𝐼_𝐷, 𝑉_𝐷𝑆 and 𝑉_𝐷. 𝐼_𝐷𝑆𝑆 = 20 mA, 𝑉_{𝐺𝑆(𝑜𝑓𝑓)} = −5 V, 𝑉_𝐷𝐷 = 30 V, 𝑅_𝐺 = 560 k Ω , 𝑅_𝑆 = 420 Ω , 𝑅_𝐷 = 1.5 k Ω .
   

   

3. For Figure 3.8.2 , determine 𝐼_𝐷 , 𝑉_𝐺 and 𝑉_𝐷 . 𝐼_𝐷𝑆𝑆 = 15 mA, 𝑉_𝐷𝐷 = 25 V, 𝑉_{𝐺𝑆(𝑜𝑓𝑓)} = −3 V, 𝑉_𝑆𝑆 = −6 V, 𝑅_𝐺 = 820 k Ω , 𝑅_𝑆 = 2 k Ω , 𝑅_𝐷 = 3.6 k Ω .
4. For the circuit of Figure 3.8.2 , determine 𝐼_𝐷 , 𝑉_𝐷𝑆 and 𝑉_𝐷 . 𝐼_𝐷𝑆𝑆 = 18 mA, 𝑉_{𝐺𝑆(𝑜𝑓𝑓)} = −3 V, 𝑉_𝐷𝐷 = 30 V, 𝑉_𝑆𝑆 = −9 V, 𝑅_𝐺 = 910 k Ω , 𝑅_𝑆 = 1.2 k Ω , 𝑅_𝐷 = 2.7 k Ω .
5. For the circuit of Figure 3.8.3 , determine 𝐼_𝐷 , 𝑉_𝐺 and 𝑉_𝐷 . 𝐼_𝐷𝑆𝑆 = 12 mA, 𝑉_{𝐺𝑆(𝑜𝑓𝑓)} = −4 V, 𝑉_𝐷𝐷 = 35 V, 𝑅_𝐺 = 680 k Ω , 𝑅_𝐷 = 1.8 k Ω .
   

   

6. For the circuit of Figure 3.8.3 , determine 𝐼_𝐷 , 𝑉_𝐷𝑆 and 𝑉_𝐷 . 𝐼_𝐷𝑆𝑆 = 8 mA, 𝑉_{𝐺𝑆(𝑜𝑓𝑓)} = −2 V, 𝑉_𝐷𝐷 = 30 V, 𝑅_𝐺 = 750 k Ω , 𝑅_𝐷 = 2.7 k Ω .
   

   

7. For the circuit of Figure 3.8.4 , determine 𝐼_𝐷 , 𝑉_𝐺 and 𝑉_𝐷 . 𝐼_𝐷𝑆𝑆 = 8 mA, 𝑉_{𝐺𝑆(𝑜𝑓𝑓)} = −4 V, 𝑉_𝐷𝐷 = 30 V, 𝑅₁ = 2.7 M Ω , 𝑅₂ = 110 k Ω , 𝑅_𝐷 = 470 Ω .
8. For the circuit of Figure 3.8.4 , determine 𝐼_𝐷 , 𝑉_𝐷𝑆 and 𝑉_𝐷 . 𝐼_𝐷𝑆𝑆 = 12 mA, 𝑉_{𝐺𝑆(𝑜𝑓𝑓)} = −6 V, 𝑉_𝐷𝐷 = 20 V, 𝑅₁ = 2 M Ω , 𝑅₂ = 100 k Ω , 𝑅_𝐷 = 680 Ω .
9. For the circuit of Figure 3.8.5 , determine 𝐼_𝐷 , 𝑉_𝐺 and 𝑉_𝐷 . 𝐼_{𝐷(𝑜𝑛)} = 8 mA, 𝑉_{𝐺𝑆(𝑜𝑛)} = 5 V, 𝑉_{𝐺𝑆(𝑡ℎ)} = 3 V, 𝑉_𝐷𝐷 = 30 V, 𝑅₁ = 2 M Ω , 𝑅₂ = 330 k Ω , 𝑅_𝐷 = 1.2 k Ω .
10. For the circuit of Figure 3.8.5 , determine 𝐼_𝐷 , 𝑉_𝐷𝑆 and 𝑉_𝐷 . 𝐼_{𝐷(𝑜𝑛)} = 12 mA, 𝑉_{𝐺𝑆(𝑜𝑛)} = 6 V, 𝑉_{𝐺𝑆(𝑡ℎ)} = 2.5 V, 𝑉_𝐷𝐷 = 25 V, 𝑅₁ = 1.5 M Ω , 𝑅₂ = 470 k Ω , 𝑅_𝐷 = 680 Ω .
    

    

    

11. For the circuit of Figure 3.8.6 , determine 𝐼_𝐷 , 𝑉_𝐺 and 𝑉_𝐷 . 𝐼_𝐷𝑆𝑆 = 12 mA, 𝑉_{𝐺𝑆(𝑜𝑓𝑓)} = 2 V, 𝑉_𝐷𝐷 = −25 V, 𝑅_𝐺 = 470 k Ω , 𝑅_𝑆 = 800 Ω , 𝑅_𝐷 = 1.8 k Ω .
12. For the circuit of Figure 3.8.6 , determine 𝐼_𝐷 and 𝑉_𝐷 . 𝐼_𝐷𝑆𝑆 = 10 mA, 𝑉_{𝐺𝑆(𝑜𝑓𝑓)} = 2 V, 𝑉_𝐷𝐷 = −20 V, 𝑅_𝐺 = 560 k Ω , 𝑅_𝑆 = 680 Ω , 𝑅_𝐷 = 1.5 k Ω .
    

    

13. For the circuit of Figure 3.8.7 , determine 𝐼_𝐷, 𝑉_𝐺 and 𝑉_𝐷 . 𝐼_𝐷𝑆𝑆 = 14 mA, 𝑉_{𝐺𝑆(𝑜𝑓𝑓)} = 3 V, 𝑉_𝐷𝐷 = −25 V, 𝑉_𝑆𝑆 = 6 V, 𝑅_𝐺 = 780 k Ω , 𝑅_𝑆 = 2 k Ω , 𝑅_𝐷 = 3.3 k Ω .
    

    

14. For the circuit of Figure 3.8.7 , determine 𝐼_𝐷 and 𝑉_𝐷 . 𝐼_𝐷𝑆𝑆 = 16 mA, 𝑉_{𝐺𝑆(𝑜𝑓𝑓)} = 3.5 V, 𝑉_𝐷𝐷 = −20 V, 𝑉_𝑆𝑆 = 7 V, 𝑅_𝐺 = 1 M Ω , 𝑅_𝑆 = 1.5 k Ω , 𝑅_𝐷 = 2.2 k Ω .
15. For the circuit of Figure 3.8.8 , determine 𝐼_𝐷 and 𝑉_𝐷 . 𝐼_𝐷𝑆𝑆 = 11 mA, 𝑉_{𝐺𝑆(𝑜𝑓𝑓)} = 2 V, 𝑉_𝐷𝐷 = −24 V, 𝑅_𝐺 = 750 k Ω , 𝑅_𝐷 = 1.2 k Ω .
16. For the circuit of Figure 3.8.8 , determine 𝐼_𝐷 and 𝑉_𝐷 . 𝐼_𝐷𝑆𝑆 = 9 mA, 𝑉_{𝐺𝑆(𝑜𝑓𝑓)} = 3 V, 𝑉_𝐷𝐷 = −18 V, 𝑅_𝐺 = 430 k Ω , 𝑅_𝐷 = 910 Ω .
    

    

Design Problems

17. Using the circuit of Figure 3.8.1 , determine a value for 𝑅_𝑆 to set 𝐼_𝐷 to 4 mA. 𝐼_𝐷𝑆𝑆 = 10 mA, 𝑉_{𝐺𝑆(𝑜𝑓𝑓)} = −2 V, 𝑉_𝐷𝐷 = 18 V, 𝑅_𝐺 = 470 k Ω , 𝑅_𝐷 = 1.5 k Ω .
    

    

18. For the circuit of Figure 3.8.9 , determine 𝑅_𝐷 and 𝑅_𝐺 to set 𝐼_𝐷 = 10 mA. 𝐼_{𝐷(𝑜𝑛)} = 15 mA, 𝑉_{𝐺𝑆(𝑜𝑛)} = 6 V, 𝑉_{𝐺𝑆(𝑡ℎ)} = 2 V, 𝑉_𝐷𝐷 = 20 V.
19. For the circuit of Figure 3.8.9 , determine 𝑅_𝐷 and 𝑅_𝐺 to set 𝐼_𝐷 = 15 mA. 𝐼_{𝐷(𝑜𝑛)} = 10 mA, 𝑉_{𝐺𝑆(𝑜𝑛)} = 5 V, 𝑉_{𝐺𝑆(𝑡ℎ)} = 2 V, 𝑉_𝐷𝐷 = 25 V.

Challenge Problems

20. Using the circuit of Figure 3.8.2 , determine values for 𝑅_𝐷 , 𝑅_𝑆 and 𝑉_𝑆𝑆 to set 𝐼_𝐷 to 5 mA and 𝑉_𝐷 to 20 V. 𝐼_𝐷𝑆𝑆 = 15 mA, 𝑉_{𝐺𝑆(𝑜𝑓𝑓)} = −3 V, 𝑉_𝐷𝐷 = 30 V, 𝑅_𝐺 = 560 k Ω .
21. Using the circuit of Figure 3.8.10 , determine values for 𝑅_𝐷 to set 𝑉_𝐷 to 15 V. 𝐼_𝐷𝑆𝑆 = 10 mA, 𝑉_{𝐺𝑆(𝑜𝑓𝑓)} = 3 V, 𝑉_𝑆𝑆 = 25 V, 𝑅_𝐺 = 680 k Ω .