[TOC]

# Lab 1 2nd Feb

Basics of CMOS Technology
NAND : pMOS in parallel { **remember by APP**, A : (N)AND, P : pMOS, P : parallel}

Types of analysis
Transient : calculates a circuit's response over a period of time defined by the user

## To calculate
<ol>
<li> Rise Time</li>
<li> Fall Time</li>
<li> Delay Time</li>
</ol>


Open LTSpice XVII

Add component => serach for voltage
Right click on the voltage component, click on advanced settings, and give the parameters to make the source V-pulse.

Add components, R : 1kΩ ohm C : 1µF
Connect components with wire, add a ground reference point.

Right click on the schematic, create a Label Net, to observe voltage at a particular point.

Click on the label-net, to observe the voltage trend. To compare the output with input, also create a label-net for the input side.

## Observations

Peak Voltage 5V
| timestamp | voltage | remarks |
| -------- | -------- | - |
| 1.71ms | 0.5V | Reaching V₁₀ at charging|
| 23.41ms | 4.5V | Reaching V₉₀ at charging |
| 102.56ms | 4.5V | Reaching V₉₀ at discharging|
| 124.39ms | 0.5V | Reaching V₁₀ at discharging|

# Lab 2 missed

# Lab 3 16th Feb
CMOS

Create symbolic, schematic, merge and run

# Lab 4 23rd Feb
Transient and DC analysis for the following

To create symbol
1. Hierarchy tab
2. Create new symbol

| param | pulse 1 | pulse 2 |
| - | - | - |
| v_initial | 0 | 0|
|Von |5 | 5 |
|Tdelay |0|0|
|Trise |0.001|0.001|
|Tfall |0.001|0.001|
|Ton |0.1|0.2|
|Tperiod |0.2|0.4|

## NAND gate

### Schematic

<hr>

### Truth Table
| A | B | Output |
|-|-|-|
|0|0|1|
|0|1|1|
|1|0|1|
|1|1|0|

<hr>

## NOR gate
pMOS in series, nMOS in parallel
### Schematic

### Truth Table
| A | B | Output |
|-|-|-|
|0|0|1|
|0|1|0|
|1|0|0|
|1|1|0|

# Lab 5 8th March

## XOR

### Schematic

### Truth Table
| A | B | Output |
|-|-|-|
|0|0|0|
|0|1|1|
|1|0|1|
|1|1|0|

## XNOR

### Schematic

### Truth Table
| A | B | Output |
|-|-|-|
|0|0|1|
|0|1|0|
|1|0|0|
|1|1|1|

# Lab 6 15th March MuX

4x1 MuX using CMOS

2x1 MuX using CMOS

To create 4x1 MuX using 2x1

# Lab 9 12th April

# Viva Questions
Why to use CMOS technology ?
1. Less power dissipation
2. Compact, saves space
3. Large noise tolerance

When to prefer BJT over CMOS ?
Faster speeds, as in CMOS