0006 第6章集成运算（Chapter 6 integration operations）.docVIP

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0006 第6章集成运算（Chapter 6 integration operations）.doc

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0006 第6章集成运算（Chapter 6 integration operations）

0006 第6章集成运算（Chapter 6 integration operations） 3.1 due to the introduction of integrated operational amplifier integrated operational amplifier circuit in a small chip on the hundreds of thousands or even hundreds of thousands of elements, therefore, difficult to manufacture inductor and large capacitor component, use the direct coupling between all levels of amplifying circuit connection. In addition, the transistor is used to replace the resistance of high resistance value with the transistor. The 3.1.1 integrated transport consists of a very large variety of integrated operational amplifiers, and the internal circuitry is different, but generally consists of the following four parts, as shown in figure 3.1. Figure 3.1 integrated op-amp block diagram input stage: because internal integrated operational amplifier circuit at all levels between the connecting method using direct coupling, so the input stage is generally semiconductor transistor or MOS tubes differential amplifier circuit with constant current source. Therefore, it has the characteristics of high input resistance, small zero drift and strong anti-interference ability. It has two input terminals, called the same phase input and the reverse input. Intermediate level: the main function is to increase the voltage amplification multiple, usually the common emitter amplification circuit. Output level: usually the emitter or complementary symmetry amplifier circuit. The output level circuit has low output resistance and high load capacity, which can output enough voltage and current. Figure 3.2 presents the principle circuit and symbol of a simple integrated operational amplifier. Figure 3.2 the principle of simple integrated operational amplifier circuit and symbols 3.1.2 1. The main parameters in the integrated operational amplifier open-loop voltage magnification Auo in the integration of op-amp without additional feedback differential mode voltage magnification, known as open loop voltage magnification,