Question

difference between analog and digital circuit?

Answer 1

@ajprincess

Answer 2

Your voice is an analog path of information. It has a range of sounds that flows from one to another with large degrees of change. A digital sequence of sounds is one sound, on or off. The same concept is true of analog and digital circuitry. The older, analog devices worked across ranges with variance. An old TV or radio tuner could be near a channel, not on it, and get signal. Digital devices use simple on/off circuits in complex arrays to be more precise. They are always in a specific state and change to some other state with no real flow of transition between.

Answer 3

List of differences this causes:
http://www.diffen.com/difference/Analog_vs_Digital

Answer 4

What about a CRT TV? Is it digital or analog?

Answer 5

The tube is an analog device, but the electronics feeding it these days may be digital and probably are. LCD, in contrast, is full digital.

Answer 6

Okay so can we achieve an analog circuit? Because if we talk in nano seconds,Can the temperature on my thermometer be analog? nano seconds is also very huge when we talk about analog.So is it easy to achieve it?

Answer 7

The difference is in how many states exist for the device. Are they finite or not? An old school, mercury or alcohol in a tube, thermometer is analog. A balancing scale is analog. A door is analog. All of them have infinite possible states. Digital devices have parts that have two states: on or off. By complex arrangements of those parts, they emulate far, far more, but at the foundation it is just two.

A digital thermometer will detect the temperature to within the tolerance of the digital states it supports. So say the temperature is 53.170043782974739304 degrees, but the digital attachment to the sensor is only accurate to .001 degrees. Then it will tell you the temperature is 53.170 degrees, which is wrong, but it is close enough for most uses.

That is the down side to digital, it is not 100% accurate. It is an approximation caused by putting things in precise and limited terms. At the same time, those errors are generally too small for people to notice or care about.

Answer 8

What's an example of a finite state machine?

Answer 9

http://en.wikipedia.org/wiki/Finite-state_machine