[amp_mcq option1=”Two” option2=”Three” option3=”One” option4=”Four” correct=”option1″]
The correct answer is: A. Two
A latch-up is a parasitic bipolar transistor formed in CMOS integrated circuits. It can cause permanent damage to the circuit if not properly controlled. The latch-up effect can be triggered by a number of factors, including overvoltage, overcurrent, and radiation.
The latch-up effect can be prevented by using a number of techniques, including:
- Using a well guard ring around each MOSFET.
- Using a substrate bias circuit to prevent the substrate from becoming too positive.
- Using a body diode to shunt current away from the substrate.
The latch-up effect is a serious problem in CMOS integrated circuits. It can cause permanent damage to the circuit if not properly controlled. There are a number of techniques that can be used to prevent the latch-up effect, including using a well guard ring around each MOSFET, using a substrate bias circuit to prevent the substrate from becoming too positive, and using a body diode to shunt current away from the substrate.
Here is a brief explanation of each option:
- Option A: Two transistors are required to form a parasitic bipolar transistor. This is the minimum number of transistors required to create a latch-up condition.
- Option B: Three transistors are not required to form a parasitic bipolar transistor. A minimum of two transistors are required.
- Option C: One transistor is not enough to form a parasitic bipolar transistor. A minimum of two transistors are required.
- Option D: Four transistors are not required to form a parasitic bipolar transistor. A minimum of two transistors are required.