1. Active device, its main feature is: (1) consuming electricity (2). It also needs external power supply.

　　2. Divided device, divided into (1) bipolar crystal transistor (2) field effect transistor (3) Salonechor (4) semiconductor resistance capacitance

　　3. The simulation integrated circuit mainly refers to an integrated circuit used to process analog signals by integrated simulation circuits composed of capacitors, resistors, transistors, etc. There are many simulation integrated circuits, such as integrated computing amplifiers, comparators, pairing and index amplifiers, simulation multiplied (except) magic weapons, locking loops, power management chips, etc. The main constituent circuits of the simulated integrated circuit include: amplifier, filter, feedback circuit, reference source circuit, switch capacitor circuit, etc. The design of the simulation integrated circuit is mainly obtained by manual circuit debugging through experienced designers. Most of the digital integrated circuit design corresponding to this is automatically produced by using hardware description language under the control of EDA software.

　　4. Digital integrated circuits are digital logic circuits or systems made of components and connections on the same half of the conductor chip. According to the number of door circuits or meta, components contained in the digital integrated circuit, the digital integration circuit can be divided into small -scale integrated (SSI) circuits, a mSI circuit, a large -scale integrated (LSI) circuit, a large -scale integrated VLSI circuit and Extra -scale integrated (ULSI) circuit. The door circuit contains small -scale integrated circuits is within 10, or the number of components does not exceed 100; the door circuits containing the categorian integrated circuits are between 10 and 100, or the number of components is between 100 and 1,000; The door circuits containing large -scale integrated circuits are more than 100, or the number of components is between 10 to 10; the door circuits contain more than 10,000 large -scale integrated circuits, or the number of components is between 10 to 10; The number of components of a large -scale integrated circuit is between 10 and 10. It includes: basic logic doors, triggers, registers, decoders, drivers, counter, plastic surgery circuit, programmable logic device, microprocessor, single -chip machine, DSP, etc.