Analog Circuit Design Techniques for Current Mirrors and Amplifiers
Explore the design and analysis of current mirrors and amplifiers in analog circuits, focusing on parameters like transistor sizing, large and small signal behaviors, and maximizing source/sink capabilities. Dive into topics such as cascode transistors, common drain amplifiers, and the impact of specifications on circuit performance. Get insights into optimizing input and output impedance, linear gain, and dealing with parameter mismatches for ideal circuit operation.
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Presentation Transcript
INEL 5265 Current Mirrors 3/18/2025 Last Lecture Current Source Amplifier Chp. - 5.1 large signal behavior small signal behavior design excercise VDD Vb M3 Cascode Transistor Chp. - 5.3 large signal effect small signal effect Vout Vcn M2 The specifications of the circuit have a direct impact on the transistor sizing! Vin M1 1 Analog Circuit Design
INEL 5265 Current Mirrors 3/18/2025 Common Drain Amplifier VDD VDD ID Vin M1 Vin M1 Vout Vout M2 Vb Ibias Simplified Schematic Implementation VGS 2 Analog Circuit Design
INEL 5265 Current Mirrors 3/18/2025 Common Drain Amplifier as an Output Stage Maximum source and sink capabilities? pMOS nMOS VDD VDD Vb M2 Vin M1 Vout Vout Vin M1 RL M2 Vb RL VSS VSS 3 Analog Circuit Design
INEL 5265 Current Mirrors 3/18/2025 Problem 5.1-11 4 Analog Circuit Design
INEL 5265 Current Mirrors 3/18/2025 Current Mirrors Chap. #4.4 VDD Circuits used to replicates, amplify or minimize an given input current. Iout Iin + _ + _ Current Mirror Vin Vout Iout Ideal Behavior Linear Gain Ai Iin Iin Low Input Impedance 1/Rin Iout Vin 1/Rout High Output Impedance Vout 5 Analog Circuit Design
INEL 5265 Current Mirrors 3/18/2025 Basic Current Mirror DC Analysis AC Analysis Parameter Mismatch Effects VDD iin iout Iout Rin Rout Iref M1 M2 M1 M2 6 Analog Circuit Design
