Threshold voltage dependence on Vdb

opcode0x90

Why does the Vth of MOSFETs depends on Vsb and not Vdb even though MOSFETs are symmetrical devices? Is it a convention to choose Vsb over Vdb or am I missing out on something more fundamental?

Kholdstare

Because the source is usually kept at the constant. Also after pinch-off the drain is separated from channel charge by a depletion layer.

Similar Threads for: Threshold voltage dependence on Vdb
Thread	Forum	Replies
Measuring threshold voltage	Advanced Physics Homework	0
OPtical BER finding threshold voltage	Engineering, Comp Sci, & Technology Homework	0
Finding MOSFET threshold voltage	Engineering, Comp Sci, & Technology Homework	0
About VT(threshold voltage) of MOS	Introductory Physics Homework	1
Why is there a flatband voltage in the calculation of Threshold voltage?	Introductory Physics Homework	0

opcode0x90	Threshold voltage dependence on Vdb Tweet Why does the Vth of MOSFETs depends on Vsb and not Vdb even though MOSFETs are symmetrical devices? Is it a convention to choose Vsb over Vdb or am I missing out on something more fundamental?

Kholdstare	Because the source is usually kept at the constant. Also after pinch-off the drain is separated from channel charge by a depletion layer.