Electronic Devices - DC Biasing-FETs - Discussion
Discussion Forum : DC Biasing-FETs - General Questions (Q.No. 14)
14.
At what value of RS does the circuit switch from depletion mode to enhancement mode?
250 
500
10 M
None of the above
Discussion:
2 comments Page 1 of 1.
Hannah said:
9 years ago
Explain the solution for it.
Basilio said:
7 years ago
Vg = 18(10M/10M+110M) = 1.5V.
Vs = IDss*Rs = 6mA(750ohms) = 4.5V.
VGS = 1.5V-4.5V = -3V.
To be at enhancement mode, VGS should be >= 0.
VG - VS = 0.
1.5V - 6mA(Rs) = 0.
Rs = 250ohms.
Vs = IDss*Rs = 6mA(750ohms) = 4.5V.
VGS = 1.5V-4.5V = -3V.
To be at enhancement mode, VGS should be >= 0.
VG - VS = 0.
1.5V - 6mA(Rs) = 0.
Rs = 250ohms.
(2)
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers