no one can start from nothing or scratch .You should first learn the theoretical behind the electronics , then you need to assemble electroncis circuit on breadboard .Means, you don't need to design circuit , just find projects which already designed by other people and assemble then on breadboard . When you do this too many times , you will feel that you are able to designe a small circuit from scratch and keep going do that .
first step try reading books on Analog Integrated Circuit Design then try to design single stage if you succed then try to design opamp with simple configuration. Hope this help you
Hi,
First you start with Microelectronic Circuits Sedra/Smith book.
This will clear ur fundamentals of transistors and MOSFETS.
Try to solve the examples given at the end of each chapter.
Along with this you can use SPICE for doing practice.
First you must learn to anylize the circuits. Then you will learn the
designing almost atomatically.
I don't know you want to design analog or digital circuits. if analog, you need to understand the characteristics of some simple discrete component.
if digital, you need to be familiar with the design method of circuits, and popular IC circuits, for they are a important base for designing circuits.