h18_lecture13_2

h18_lecture13_2 - EE 214 Lecture 13 (HO#18) B. Murmann 1...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: EE 214 Lecture 13 (HO#18) B. Murmann 1 Lecture 13 Fully Differential OpAmps and OTAs Boris Murmann Stanford University murmann@stanford.edu Copyright 2004 by Boris Murmann EE 214 Lecture 13 (HO#18) B. Murmann 2 Overview Reading 6.0, 6.1.1, 6.1.2, 6.1.2 (Basic Feedback Concepts) 12.1, 12.2, 12.3, 12.4 (Fully Differential OpAmps) Introduction Having discussed the basic properties of ideal feedback loops, we will now take steps toward a practical implementation of feedback amplifiers in CMOS technology. The first amplifier we consider uses a very crude gain stage, composed of a simple differential pair and an active current mirror load. For the time being, we will use this crude topology as a vehicle to gain insight into terminology, analysis and design tradeoffs, before moving to more complicated circuits in future lectures. EE 214 Lecture 13 (HO#18) B. Murmann 3 Feedback Using Ideal OpAmp a f v in v out- R 2 R 1 v in v out 2 1 1 R R R f + = ( ) + = v v g v out 1 2 1 2 1 1 1 1 R R R R R R g g af a v v in out + + + = + = g a = EE 214 Lecture 13 (HO#18) B. Murmann 4 Inverting Configuration Circuit does not map directly into generic block diagram Cannot directly identify a and f a g a f v in v out- R 2 R 1 v out v in ? f = ( ) + = v v g v out ? a = EE 214 Lecture 13 (HO#18) B. Murmann 5 Superposition a f v in v out- a f v out- v test a af EE 214 Lecture 13 (HO#18) B. Murmann 6 Inverting Configuration R 2 R 1 v out v in R 2 R 1 v out v test g R R R a + = 2 1 2 g R R R af + = 2 1 1 EE 214 Lecture 13 (HO#18)...
View Full Document

Page1 / 11

h18_lecture13_2 - EE 214 Lecture 13 (HO#18) B. Murmann 1...

This preview shows document pages 1 - 4. Sign up to view the full document.

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