Design Criteria for Low Distortion in Feedback Opamp Circuits Broadband opamps for multi channel communication systems have strong demands on linearity performance. When these opamps are integrated in deep sub micron CMOS technologies the signal swing has to occupy a large part of the rather low supply voltage to maintain the signal to noise ratio. To obtain opamps with low distortion it is necessary to do a thorough analysis of the nonlinear behaviour of such circuits and this is the main subject of Design Criteria for Low Distortion in Feedback Opamp Circuits. The biasing of each transistor in the circuit is a major issue and is addressed in this work. It is important to bias the transistor such that the distortion is low and stable in the entire range of its terminal voltages. This will ensure high linearity and robustness against variations in circuit conditions such as power supply voltage bias current and process variations. Design Criteria for Low Distortion in Feedback Opamp Circuits is written for . From the contents: List of Figures List of Tables Symbols and Abbreviations Foreword Preface Acknowledgement 1: Introduction 2: Specification and Analysis of Nonlinear Circuits 3: Biasing and Opamp Modeling for Low Distortion 4: Nonlinear Analyzes of Feedback Miller Opamp 5: Opamp Circuits with High Linearity Performance 6: Conclusions and Discussions Appendix A:Transistor Model. Appendix B: Closed Loop Opamp Transfer Functions. Appendix C: Open Loop Opamp Transfer Functions.