Digital Electronics
Digital Electronics is an electronics that use the binary form of a number. Basically, it is a device which can understand only 0 and 1.
Digital System is two kinds of:
1. Analog
2. Digital
Analog:
Analog circuits are those in which voltages and currents vary continuously through the given range. They can take infinite values within a specified range.3
Digital:
A Digital circuit is one in which the voltage levels assume a finite number of distinct values.
It is to be noted that digital circuits are also called switching circuits because the voltage levels in a digital circuit are assumed to be switched from one value to another. And switching circuit are two types of:
1. Combinational Switching Circuit
2. Sequential Switching Circuit
Combinational Switching Circuit:
It is a switching circuit which output depends on present inputs only. It has no memory.
Combinational Switching Circuit
Sequential Switching Circuit:
It is a switching circuit which output depends not only on present inputs but also present state as well as past inputs also.
It can say that sequential circuits are nothing but combinational circuits with memory.
Sequential Switching Circuit
Sequential Switching circuits may be two types of:
1. Synchronous
2. Asynchronous
Synchronous Switching Circuit:
In synchronous switching circuit state transition can take place only when the inputs are applied along with a clock pulse.
Synchronous Circuit
Asynchronous Switching Circuit:
In asynchronous switching circuit state transition can take place any time the inputs are applied.
It is a very important note that, Digital Circuits are also called logic circuits because each type of digital circuit obeys a set of logic rules.
Digital system is used extensively in computation and all other processing,
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