Circuit into the digital and analog circuits. Figures in time and amplitude are discrete signal; a simulation at the time or amplitude of the continuous signal.
Digital circuitry (digital system) refers to a complete circuit to a digital signal by the digital arithmetic logic operation amount. Because it has a logic arithmetic and logical processing, also known as digital logic circuits.
Some modern digital integrated device by a semiconductor process a digital circuit constructed made.
A digital circuit or digital integrated circuit is complicated by a number of logic gates and memory thereof. Logic gate is a basic unit of the digital logic circuit. The memory is used to store binary data in a digital circuit. Compared with analog circuits, it is mainly for processing digital signals (i.e., signals represented by two states 0 and 1), so a simple, reliable system (strong anti-interference ability) implementation.
Digital circuit is divided:
1, according to the function into a combinational logic circuit and a sequential logic circuit into two categories:
The former referred to the combination circuit, which combines the basic logic gate circuit formed;
The latter referred to as the sequential circuit, which is composed of basic logic gates coupled feedback logic circuit (input to output) a combination of circuit or device, the most essential difference between the combination circuit comprising a sequential circuit having a memory function.
2, according to the structure is divided into discrete element circuit and an integrated circuit:
The former is a circuit independent transistors, resistors and other components connected by wire;
The latter components and conductors formed on a semiconductor wafer, enclosed within a housing, and welding the lead circuit. Integration of integrated circuits is different.
3, according to IC integration into small-scale integrated digital circuits (SSI), medium-scale digital integrated circuits (MSI), digital large-scale integrated circuit (LSI) and very large scale integrated digital circuits (VLSI).
Digital circuits:
The main problem of digital logic circuits is studied state ( "0" or "1") output signal and the input signal ( "0" or "1") between, i.e., the logic function circuits.
Method of digital logic circuits and logic design analysis tools required logic algebra. (In positive logic, "0" is low, "1" is high, low high no clear boundaries)
Analog circuitry is used to refer to an analog signal for transmission, conversion, processing, amplification, measuring circuit and a display, etc., is the basis of the electronic circuit.
Analog circuit Category:
1, the amplifier circuit: a signal voltage, current, or power amplification.
2, the filter circuit: a signal extraction, transformation or interference.
3, the arithmetic circuit: the ratio of the completion signal, addition, subtraction, multiplication, division, integration, differentiation, logarithmic, exponential and other operations.
4, the signal conversion circuit: for converting the current signal into a voltage signal or a current signal into a voltage signal, converts the AC signal into a DC signal or the AC signal into a DC signal, the DC voltage is converted into a proportional thereto frequency……
5, the signal generating circuit: for generating a sine wave, rectangular wave, triangular wave, sawtooth wave.
6, a DC power supply: a 220V, 50Hz alternating current into direct current of different voltage and current output, as the power supply of various electronic circuits.
and many more.