This post tells about analog divider and multiplier and covers an introduction to voltage divider and multiplier. The voltage divider and multiplier are considered…

# Category: Year 1

## What is a JFET transistor and how it works

This post is about structure, parameters and properties of JFET transistor. JFET transistor is a three-terminal device, where one of the terminal can control…

## Complex numbers

Definition of complex number A Complex number is a pair of real numbers (x;y). Its algebraic form is z=x+i*y, where i is an imaginary…

## Complex numbers 2

Let's suggest a function y=f(x) that is defined on the interval (a,b). Choose a point x on the interval (a,b), and another point x+∆x…

## Differentiability, differential of a function and integral

If function y=f(x) has a derivative in the point x: lim∆x→0 ∆y∆x=f' (x) Let's introduce the function: α(x)=∆y∆x-f' (x)=f(x+∆x)-f(x)∆x-f' (x) Function α(x) exists with the…

## Quiz

Solve this quiz and write your answers in comments. Exercise 1. Calculate: a. 5-1i3+i;b. (7+2i)-(3-2i)+(11+i)-(17-3i);c. (2+i)*(5-2i)+(6+13i)*(7-i);d. -13+6i2-i+ (8-i5+2i)2 Exercise 2. Calculate: Re(12-i6+3i), Im(-2i5+i) Exercise 3. Find all…

## Electric conduction

The previous module showed the characteristics of semiconductors and their variety under different conditions. Here we will briefly recap the main characteristics of semiconductors…

## P-N junction in semiconductors

This post is covers the topic of pn junction definition. A semiconductor itself does not give any special properties to a semiconductor device. However,…

## Large signal diode models

Ideal diode model: describes the diode as an on-off device. The ideal diode can be approximated to the open-circuit and short-circuit device. In the…

## Small-signal diode models

The idea of small-signal modelling is that the short-cut part of the current-voltage characteristic of the semiconductor diode is not precise enough in an…