卡思米机电 22
卡思米机电

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relay

Relay is an electronic control device, which has a control system (also called input circuit) and a controlled system (also called output circuit). It is usually used in automatic control circuits. It is actually an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic regulation, safety protection and conversion circuit in the circuit. Automobile relay/signal relay Solid state relay/intermediate relay Electromagnetic relay/dry spring relay Wet spring relay/thermal relay Step relay/high-power relay Magnetic holding relay/polarization relay Temperature relay/vacuum relay Time relay/hybrid electronic relay Time delay relay/other relays

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Crystal diode

The crystal diode is usually represented by "D" and numbers in the circuit, for example, D5 represents the diode with number 5. Function: The main characteristic of the diode is unidirectional conductivity, that is, under the action of forward voltage, the conduction resistance is very small; Under the action of reverse voltage, the conduction resistance is maximum or infinite. Because the diode has the above characteristics, it is often used in circuits such as rectification, isolation, voltage stabilization, polarity protection, coding control, frequency modulation and noise reduction in cordless telephones. Combined circuit Integrated circuit is a kind of device with certain functions formed by integrating transistor, resistor, capacitor and other components on silicon substrate with special technology. It is abbreviated as IC, also known as chip. Analog integrated circuit refers to an analog integrated circuit that is integrated by resistors, capacitors, transistors and other components to process analog signals. There are many analog integrated circuits, such as integrated operational amplifier, comparator, logarithmic and exponential amplifier, analog multiplier (divider), phase-locked loop, power management chip, etc. The main components of analog integrated circuits include amplifier, filter, feedback circuit, reference source circuit, switch capacitor circuit, etc. Analog integrated circuit design is mainly obtained through manual circuit debugging and simulation by experienced designers, and most of the corresponding digital integrated circuit design is generated automatically by using hardware description language under the control of EDA software. Electronic components Digital integrated circuit is a digital logic circuit or system made by integrating components and wires on the same semiconductor chip. According to the number of gate circuits or components contained in digital integrated circuits, digital integrated circuits can be divided into small-scale integrated circuits (SSI), medium-scale integrated circuits (MSI), large-scale integrated circuits (LSI), ultra-large-scale integrated circuits (VLSI) and ultra-large-scale integrated circuits (ULSI). Small-scale integrated circuits contain no more than 10 gate circuits or no more than 100 components; Medium-scale integrated circuits include 10-100 gate circuits, or 100-1000 components; Large-scale integrated circuits contain more than 100 gate circuits or more than 1000 components; VLSI contains more than 10000 gate circuits; VLSI contains more than 100000 gate circuits. It includes: basic logic gate, trigger, register, decoder, driver, counter, shaping circuit, programmable logic device, microprocessor, single-chip microcomputer, DSP, etc.

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Classification of electronic classification

1、 Components: products that do not change the molecular composition of raw materials during processing can be called components. Electronic components Components are devices that do not require energy. It includes resistance, capacitance and inductance. (also known as passive components) Elements are divided into: 1. Circuit components: diodes, resistors, etc. 2. Connecting components: connectors, sockets, connecting cables, printed circuit boards (PCBs), etc. 2、 Devices: The products whose molecular structure of raw materials has been changed during production and processing are called devices. Devices are divided into: 1. The main characteristics of active devices are: (1) self consumption of electric energy, (2) need of external power supply. 2. Discrete devices are divided into (1) bipolar crystal triode, (2) field effect transistor, (3) thyristor, (4) semiconductor resistor and capacitor. resistance The resistance is represented by "R" plus a number in the circuit, for example, R1 represents the resistance numbered 1. The main functions of resistance in the circuit are: shunt, current limiting, partial voltage, bias, etc. capacitance Capacitance is generally represented by "C" plus numbers in the circuit (for example, C13 represents the capacitance numbered 13). The capacitor is composed of two metal films close together and separated by insulating materials. The main characteristic of the capacitor is the direct current. The capacity of the capacitor indicates the size of the stored electric energy. The blocking effect of the capacitor on the AC signal is called capacitive reactance, which is related to the frequency and capacitance of the AC signal.

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Composition of electronic components

Electronic components are components of electronic components and small machines and instruments. They are often composed of several parts and can be used in similar products; It often refers to some parts of electrical appliances, radios, instruments and other industries. It is the general term for electronic devices such as capacitors, transistors, hairsprings, springs, etc. The common ones are diodes. Electronic components include: resistors, capacitors, inductors, potentiometers, electronic tubes, radiators, electromechanical components, connectors, discrete semiconductor devices, electro-acoustic devices, laser devices, electronic display devices, optoelectronic devices, sensors, power supplies, switches, micro motors, electronic transformers, relays, printed circuit boards, integrated circuits, various circuits, piezoelectric, crystal, quartz, ceramic magnetic materials Substrates for printed circuits, special materials for electronic functional processes, electronic adhesive (tape) products, electronic chemical materials and components, etc.

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