大二模拟电路ch9.12012new

1、Huazhong University of Science and TechnologyThe Department of Electronics and Information EngineeringElectronic Circuit Analysis and DesignDr. Tianping DengEmail: PART 1SEMICONDUCTOR DEVICES AND BASIC APPLICATIONSChapter 1Semiconductor Materials and DiodesChapter 2Diode CircuitsChapter 3The Field-E

2、ffect TransistorChapter 4Basic FET AmplifiersChapter 5The Bipolar Junction TransistorChapter 6Basic BJT AmplifiersChapter 7Frequency ResponseChapter 8Output Stages and Power AmplifiersPART 2ANALOG ELECTRONICSChapter 9Ideal Operational Amplifiers and Op-Amp CircuitsChapter 10Integrated Circuit Biasin

3、g and Active LoadsChapter 11Differential and Multistage AmplifiersChapter 12Feedback and StabilityChapter 13Operational Amplifier CircuitsChapter 14Nonideal Effects in Operational Amplifier CircuitsChapter 15Applications and Design of Integrated CircuitsContentsChapter 9Ideal Operational Amplifiers

4、and Op-Amp CircuitsCh9 The Ideal Operational Amplifier9.0 Preview9.1 The Operational Amplifier9.2 Inverting Amplifier9.3 Summing Amplifier 9.4 Noninverting Amplifier 9.5 Op-Amp Application P7-P39Ch9 The Ideal Operational Amplifier9.0 Preview Op-amp is high-gain, direct-coupled amplifier consisting o

5、f multiple stages: an input stage, a middle stage, and output stage.It serves as a building block for many electronic circuits.Objectives To learn about external characteristics of op-amps . To analyze and design op-amp circuits To learn about the usefulness of op-amps in signal conditioning.Picture

6、s of Op AmpsPictures of Op Amps9.1 The Operational Amplifier (P8)symbol for the op amp9.1.1 Ideal Parameters (P9)9.1 The Operational Amplifier (P8)9.1.1 Ideal Parameters (P9)9.1.1 Ideal Parameters (P9)Output stageVCES9.1.2 Development of the Ideal Parameters (P10)Which type?9.1.2 Development of the

7、Ideal Parameters (P10)gm19.1.3 Analysis Method (P11) The open-loop voltage gain is infinite: Aod=.The input voltages must be nearly equal: v2=v1Virtual short.9.1.3 Analysis Method (P11)The resistance riThe input currents i1 and i2 are zero.Virtual open.The output resistance is negligible: Ro=0.9.1.3 Analysis Method (P11)Aod=.riRo=0Virtual short.Virtual open.In this circuit, an op-amp turns on an LED if the proper input voltage conditions are met: Tra