Q1) Design a building security system which has three ways of detecting intruders. Security camera (SC) which gives HIGH (1) when intruder is detected. Motion Sensor (MS) which send LOW (0) signal when intruder is detected. Noise level detector (NLD) gives HIGH(1) output whenever noise increases from the threshold level The security system (your circuit) works in such a way that alarms sounds when SC doesn’t detect intruder but the MS and NLD do Neither SC nor the MS detects but NLD do SC & MS detect but the NLD doesn’t SC detects only SC & NLD detect but MS doesn’t
MOSFET (Metal Oxide Semiconductor Field Effect Transistor)
MOSFET stands for Metal Oxide Silicone Field Effect Transistor or Metal Oxide Semiconductor Field Effect Transistor. It is a type of IGFET, which means Insulated Gate Field Effect Transistor. A MOSFET has four-terminals namely gate (G), drain (D), source (S), and body (B). The body of the MOSFET is connected to the source terminal and it forms a three-terminal device. It is used in both the analog and digital circuits.
Power MOSFET
The power MOSFET transistor structures are enhancement types. The voltage rating is enhanced in the enhancement-mode MOSFETs by the use of a drift layer. The MOSFET generally contains four layers. The middle layer is the p-type layer also known as the body, whereas the n-type layer is called the drift layer or region. The drift region decides the breakdown voltage, and hence it is the lightly doped region in power MOSFETs. The first and last layers are the n+ layers. The first layer and the last layers are the source and drain layers. The structure of N-channel MOSFET (e-MOSFET) is n+ p n- n+, but the shape of p-channel is the opposite doping shape.
Q1) Design a building security system which has three ways of detecting intruders.
- Security camera (SC) which gives HIGH (1) when intruder is detected.
- Motion Sensor (MS) which send LOW (0) signal when intruder is detected.
- Noise level detector (NLD) gives HIGH(1) output whenever noise increases from the threshold level
The security system (your circuit) works in such a way that alarms sounds when
- SC doesn’t detect intruder but the MS and NLD do
- Neither SC nor the MS detects but NLD do
- SC & MS detect but the NLD doesn’t
- SC detects only
- SC & NLD detect but MS doesn’t
(Attach truth table, K-map, final output Boolean expression & screen shots circuit diagram of showing all input combination)
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