DIFFERENCE BETWEEN ANALOG CIRCUIT AND DIGITAL CIRCUIT

 DIFFERENCE BETWEEN ANALOG CIRCUIT AND DIGITAL CIRCUIT

 

Electronic circuits are the connection of various electrical and electronic components. Electronic circuits are divided in two types on the basis of processing of signal –

·         Analog circuit

·         Digital circuit

 

Analog Circuit

 

What is Analog Circuit?

 

An analog circuit is a circuit which operates on analog signal. Analog circuit takes input in analog format and also gives output in analog format. Most of the fundamental electronic components are diodes, transistors, capacitors, inductors, resistors and operational amplifiers. The analog signals are those signals which are continuously changing with respect to time

Uses of Analog Circuits

Analog circuits are used in various electronic devices like photocopiers, land-line telephones, audio tapes, old television, etc. Analog circuits are used in many communications devices and also analog circuits has significant performance advantage over digital in some specific areas. Examples of analog circuits are –

 

·         RC low pass and high pass filters

·         Dynamic signal acquisition (DSA) devices

·         Operational amplifiers or op-amps.

·         Power supply chips

·         Memory chips

·         Sensors

 

 

Advantages Of Analog Circuit

 

·         Easy to handle

·         Weather dependencies are low

·         Life span is more

·         Easy to manipulate

·         Flexibility with bandwidth

Disadvantages of Analog Circuit

·         Analog circuit is difficult to design and is more complex as compared to digital circuit.

·         Analog circuit is more prone to noise, a small change in the voltage level produce significant error. The error rate is caused due to high complexity, error prone process, custom design, and less automation compared to digital circuit.

·         More complicated to execute.

·         No security for passing data.

Corrective Devices

Analog signal on which analog circuit work can be manipulated to decrease the noise and amplify the signal, for which certain devices are used like sensors which adjusts the amplitude of the carrier signal and amplifiers which adjusts the frequency of the carrier signal.

Digital Circuit

What is Digital Circuit?

Digital circuit is a circuit which operates on Digital signal. The input signal in digital circuit is in digital form which is 0 and 1 (binary language). Most of the fundamental electronic components are AND, OR, NOT, NAND, NOR, XOR gates (logical gates).

Digital circuits are designed to overcome the downside of analog circuit which is slower speed and error in output data. Digital data is represented in logical format that is in “0” and “1”. 0 represents that the signal is low and 1 represents that the signal is high. Digital circuits are represented in two ways –

 

·        Sequential Circuit

When a memory element is included in combinational circuit then it is called sequential circuit. The previous output treated as a present state. Some common examples of sequential circuit include clocks, flip-flops, counters, etc.

·        Combinational Circuit

As the name indicates the output of a combinational circuit will determined by the combination of input variables given. Some of the common example of combinational circuit includes half adders, full adders, multiplexers, demultiplexers, and so on.

Uses of Digital Circuit

Digital circuit use in digital cameras, radios, calculators, washing machine, television, computers, flash memory, mobile phones, hard disks, including the memory of computer like RAM and ROM.

Digital circuits are also use in military systems, medical equipments, radar navigation and guiding systems.

 

Advantages of Digital Circuit

·         Design is much easier.

·         Less affected by noise.

·         Higher accuracy.

·         Communication between two digital systems is much easier.

·         Cost efficient.

·         Better information storing.

 

Disadvantages of Digital Circuit

·         Sampling error is more common.

·         Low life span

·         Highly sensitive.

·         Weather dependent

 

 

Difference Between Analog Circuit and Digital Circuit

 

Sr. No.	Key	Analog Circuit	Digital Circuit
1`	Signal Use	Analog signal	Digital signal
2	Operating Value	Continuous valued signals	“ 0 ” and ” 1 ”
3	Circuit Design	Circuit design is difficult	Simple to design
4	Change of Input Signal	No change of input signals	Input signals change from analog to digital
5	Data Loss	No need  for data conversion, so there is no loss of information	In process of conversion of input signal, there is a significant amount of data loss
6	Accuracy	Less accuracy and precision	Good Accuracy and precision
7	Transmission	Transmission can be done wirelessly and with wire both.	Transmission can be done only through wire.
8	Processing Speed	Slower in processing	Faster in processing
9	Power Consumption	Require more power	Require less power
10	Flexibility	Doesn’t offer flexibility	Offer flexibility