Application of equivalent circuit method in amplifying circuit analysis

The equivalent circuit method, also known as the low frequency small signal model, that is, in the amplified circuit under low frequency small signal, the basic components in the amplifying circuit are viewed into a linear double-port network, and the h-parameters of the network are used to represent the amplification circuit. An equivalent linear circuit can be obtained from the output characteristics, which is also referred to as an H parameter equivalent model. 1 Common amplified circuit in analog circuit 1.1 Transistor amplifying circuit The main components of the transistor amplifying circuit are PNP type, NPN type silicon transistors and several resistors. It mainly uses the characteristics of the transistor to enlarge the current in the circuit. By analyzing the input characteristics of the circuit, the amplifying circuit contains three working conditions, namely the saturation region, the zone region, and the cutoff area, normal case The amplified circuit should be operated in the zone. The common circuit form is shown in Figure 1. Be Be 1.2 Fault Tube amplifying circuit The field effect tube is also the most basic amplified circuit. Its main composition is the field effect tube and several resistors. The working principle is the same as the circuit form and the transistor amplifying circuit, which has a high input impedance, low noise. The advantages of good thermal stability. The common circuit form is shown in Figure 2. 1.3 differential amplification circuit The differential amplifying circuit is mainly configured to transistors, field effectors and several resistors. It is mainly characterized by using a fully symmetric circuit structure, in which the zero drift generated by the basic amplification circuit is to make the operating point more stable, common circuit form As shown in Figure 3. , Reading the full text, the technology area Hardware simulation commissioning based on embedded systems MS1830 chip brief description of HDMI turns CVBS function analysis MS9282 chip introduction function is VGA to HDMI Detailed integrated transceiver brings SWAP solutions How to use DFT APP for hardware simulation

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