Question:
What is Body Effect?
Answer:
Source: CoolInterview.com
Usually, in an integrated circuit there will be several MOSFETs and in order to maintain cut-off condition for all MOSFETs the body substrate is connected to the most negative power supply (in case of PMOS most positive power supply). Which causes a reverse bias voltage between source and body that effects the transistor operation, by widening the depletion region. The widened depletion region will result in the reduction of channel depth. To restore the channel depth to its normal depth the VGS has to be increased. This is effectively seen as change in the threshold voltage - Vt. This effect, which is caused by applying some voltage to body is known as body effect.
Found at http://only-vlsi.blogspot.com/ Source: CoolInterview.com
Answered by: Only-VLSI | Date: 5/30/2009
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