Đang chuẩn bị liên kết để tải về tài liệu:
Điện tử_ Chapter 11

Tài liệu tham khảo về môn Điện tử_ Chapter " Amplifiers Specifications and External Characteristics" dành cho các bạn học viên, sinh viên đang theo học ngành điện- điện tử. | Chapter 11 Amplifiers: Specifications and External Characteristics Chapter 11 Amplifiers: Specifications and External Characteristics Use various amplifier models to calculate amplifier performance for given sources and loads. 2. Compute amplifier efficiency. 3. Understand the importance of input and output impedances of amplifiers. 4. Determine the best type of ideal amplifier for various applications. 5. Specify the frequency-response requirements for various amplifier applications. 6. Understand linear and nonlinear distortion in amplifiers. 7. Specify the pulse-response parameters of amplifiers. 8. Work with differential amplifiers and specify common-mode rejection requirements. 9. Understand the various sources of dc offsets and design balancing circuits. BASIC AMPLIFIER CONCEPTS Ideally, an amplifier produces an output signal with identical waveshape as the input signal, but with a larger amplitude. Inverting versus Noninverting Amplifiers Inverting amplifiers have negative voltage gain, and the output waveform is an inverted version of the input waveform. Noninverting amplifiers have positive voltage gain. Voltage-Amplifier Model Current Gain Power Gain CASCADED AMPLIFIERS Simplified Models for Cascaded Amplifier Stages First, determine the voltage gain of the first stage accounting for loading by the second stage. The overall voltage gain is the product of the gains of the separate stages. The input impedance is that of the first stage, and the output impedance is that of the last stage. POWER SUPPLIES AND EFFICIENCY Current-Amplifier Model Aisc is the current gain of the amplifier with the output short circuited. Transconductance-Amplifier Model Connect a short circuit across the output terminals and analyze the circuit to determine Gmsc. Transresistance-Amplifier Model Open circuit the output terminals and analyze the circuit to determine Rmoc. IMPORTANCE OF AMPLIFIER IMPEDANCES IN VARIOUS APPLICATIONS Some applications call for amplifiers with high . | Chapter 11 Amplifiers: Specifications and External Characteristics Chapter 11 Amplifiers: Specifications and External Characteristics Use various amplifier models to calculate amplifier performance for given sources and loads. 2. Compute amplifier efficiency. 3. Understand the importance of input and output impedances of amplifiers. 4. Determine the best type of ideal amplifier for various applications. 5. Specify the frequency-response requirements for various amplifier applications. 6. Understand linear and nonlinear distortion in amplifiers. 7. Specify the pulse-response parameters of amplifiers. 8. Work with differential amplifiers and specify common-mode rejection requirements. 9. Understand the various sources of dc offsets and design balancing circuits. BASIC AMPLIFIER CONCEPTS Ideally, an amplifier produces an output signal with identical waveshape as the input signal, but with a larger amplitude. Inverting versus Noninverting Amplifiers Inverting amplifiers have negative .