50503

50503 - EE 541 Class Lecture Supplement Filters For...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
EE 541 Class Lecture Supplement Prof. John Choma, Professor Department of Electrical Engineering- Electrophysics University of Southern California University Park; MC: 0271; PHE #604 Los Angeles, California 90089-0271 213-740-4692 [USC Office] 213-740-7581 [USC Fax] johnc@usc.edu Filters For Broadband Circuit Compensation Fall 2006 Semester
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
University of Southern California Choma: EE 541 300 Overview Of Lecture Overview Of Lecture z Fundamental Amplification Topology ± Circuit Schematic ± Simplified Small Signal Model z Broadband Architectures ± Shunt Peaking ² Magnitude Response ² Delay Response ² Design Criteria ± Series Peaking ± Series Shunt Peaking ² Without Coupled Inductors ² With Coupled Inductors
Background image of page 2
University of Southern California Choma: EE 541 301 Filters For Amplifier Broadbanding Filters For Amplifier Broadbanding z Available Broadband Architectures ± Inductive Shunt Peaking ± Inductive Series Peaking ± Series-Shunt Peaking ± Coupled Inductor Peaking z Design Issues ± Advantages ² Broadband Compensation Structures Are Fundamentally Lossless ² Bandwidth Enhancements Of Up To Almost 300% Are Possible ² Quality Factor Of Inductors Is Generally Not A Major Concern ± Disadvantages ² Chip Surface Area Penalty With “Large” Inductors ² Chip Frequency-Dependent Parasitics Associated With Inductor Layout ² Coupled Inductors May Be Required ¾ Coupling Coefficients Difficult To Predict Analytically ¾ Reproducibility Of Coupling Coefficients Is Problematic
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
University of Southern California Choma: EE 541 302 M1 M2 V bias R s R l V + V iQ s V oQ o V o +V dd C l gV ms r o C o R l C l z Basic Gain Stage And Small Signal Model z Discussion ± Cascode Transistor M2 Mitigates Miller Effect Of Gate-Drain Capacitance Of Transistor M1 ± Model Parameters ² g m Effective Forward Transconductance ² r o Effective (Large) Output Resistance ² C o Effective Output Capacitance ¾ Includes Bulk-Drain Capacitance (C bd ) Of M2 ¾ Includes Gate-Drain Capacitance (C gd ) Of M2 ² C l Effective Load Capacitance General Broadbanding Concepts General Broadbanding Concepts
Background image of page 4
University of Southern California Choma: EE 541 303 ( ) () u ol l o 1 B rR C C = + ov o v su VA A( s ) V1 s B == + z Gain Function ± Zero Frequency Gain ± Uncompensated Bandwidth z Compensation Requirements ± Negligible Capacitances ² M1 Gate-Source Capacitance (C gs ) Because Of Small Source Resistance, R s ² Small M2 Input Resistance At Source ¾ M1 Bulk-Drain Capacitance (C bd ) ¾ M1 Gate-Drain Capacitance (C gd ) ¾ M2 Bulk-Source Capacitance (C bs ) ¾ M2 Gate-Source Capacitance (C gs ) ² Note Gate Bias Port Of M2 Is At Signal Ground ² In General, Compensation Applied To Output Port Of Amplifier Requires That Uncompensated Dominant Pole Be Established At This Port M1 M2 V bias R s R l V + V iQ s V oQ o +V dd C l V o gV ms r o C o R l C l ( ) vo m o l A grR =− Uncompensated Performance Uncompensated Performance
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
University of Southern California Choma: EE 541 304 ml l o v 2 s ll o l o sL gR1 R V A( s ) V 1s RC sL C   +  == ++ V o gV ms C o R l C l L z
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 39

50503 - EE 541 Class Lecture Supplement Filters For...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online