Microsoft PowerPoint Set 3 Single Stage Amplifiers ppt V O T U A N M I N H Faculty of Electronics and Telecommunication Engineering University of Science and Technology The University of Danang Design of Analog Integrated Circuit Giới thiệu Thiết kế vi mạch Đặc tính của MOSFET Mạch khuếch đại đơn Mạch khuếch đại vi sai Mạch gương dòng Bộ chuyển đổi tương tựsố Vòng khóa pha Chủ đề DN, 2020 V T M 2 1 General Considerations 2 Common Source Amplifiers 3 Common Drain (Source Follower).
Design of Analog Integrated Circuit VO TUAN MINH Faculty of Electronics and Telecommunication Engineering University of Science and Technology - The University of Danang Chủ đề Giới thiệu Thiết kế vi mạch & Đặc tính MOSFET Mạch khuếch đại đơn Mạch khuếch đại vi sai Mạch gương dòng Bộ chuyển đổi tương tự/số Vịng khóa pha DN, 2020 V.T.M Overview General Considerations Common-Source Amplifiers Common-Drain (Source-Follower) Amplifiers Common-Gate Amplifiers Cascode Amplifiers DN, 2020 V.T.M Why Amplifiers? Amplifiers are essential building blocks of both analog and digital systems Amplifiers are needed for variety of reasons including: To amplify a weak analog signal for further processing To reduce the effects of noise of the next stage To provide a proper logical levels (in digital circuits) Amplifiers also play a crucial role in feedback systems We first look at the low-frequency performance of amplifiers Therefore, all capacitors in the small-signal model are ignored! DN, 2020 V.T.M Amplifier Characteristics Ideally, we would like that the output of an amplifier be a linear function of the input, i.e., the input times a constant gain: 𝑦 𝑡 = 𝛼0 + 𝛼1 𝑥(𝑡) y 𝛼0 x In real world the input-output characteristics is typically a nonlinear function: 𝑦(𝑡) = 𝛼0 + 𝛼1 𝑥(𝑡) + 𝛼2 𝑥 (𝑡) + ⋯ + 𝛼𝑛 𝑥 𝑛 (𝑡) DN, 2020 V.T.M Analog Design Trade-offs DN, 2020 V.T.M Overview General Considerations Common-Source Amplifiers Common-Drain (Source-Follower) Amplifiers Common-Gate Amplifiers Cascode Amplifiers DN, 2020 V.T.M Common Source (CS) Basics In common-source amplifiers, the input is (somehow!) connected to G and the output is (somehow!) taken from D We can divide CS amplifiers into two groups: Without source degeneration (no body effect for the main transistor) With source degeneration (with body effect for the main transistor) DN, 2020 V.T.M Common Source Basics Different types of loads can be used in an amplifier Resistive Load Diode-Connected Load Current-Source Load The following parameters of amplifiers are very important DN, 2020 Small-signal gain Voltage swing V.T.M Resistive Load 10 The region of operation of M1 depends on its size and the values of Vin and RD We are interested in the small-signal gain and the headroom (which determines the maximum voltage swing) We will calculate the gain using two different methods Large-signal analysis Small-signal model DN, 2020 V.T.M ... General Considerations Common-Source Amplifiers Common-Drain (Source-Follower) Amplifiers Common-Gate Amplifiers Cascode Amplifiers DN, 2020 V.T.M Why Amplifiers? Amplifiers are essential building... Considerations Common-Source Amplifiers Common-Drain (Source-Follower) Amplifiers Common-Gate Amplifiers Cascode Amplifiers DN, 2020 V.T.M Common Source (CS) Basics In common-source amplifiers, the input... proper logical levels (in digital circuits) Amplifiers also play a crucial role in feedback systems We first look at the low-frequency performance of amplifiers Therefore, all capacitors in the