ho26.l23_ota1

ho26.l23_ota1 - OTA Feedback Circuits Feedback...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 OTA Feedback Circuits (Part I) R. Dutton, B. Murmann Stanford University R. Dutton, B. Murmann 1 EE114 (HO #26) Classification of “OpAmps” (1) •T y p e – Operational Amplifier Operational Amplifier • Ideally a voltage-controlled voltage source • Typically contains an output stage that can drive “arbitrary” loads, including small resistances • Predominantly used for board-level circuitry – Operational Transconductance Amplifier (OTA) • Ideally a voltage controlled current source • Typically restricted to capacitive (or moderate resistive) loads R. Dutton, B. Murmann 2 Typically restricted to capacitive (or moderate resistive) loads • Primarily used in integrated circuits EE114 (HO #26)
Background image of page 1

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

View Full DocumentRight Arrow Icon
2 Classification of “OpAmps” (2) Output configuration – Single ended Single ended – Differential • Predominantly used for integrated high-performance or high- precision amplifiers • Requires common mode feedback circuit – Class-A • Output cannot source/sink currents larger than quiescent point bias current R. Dutton, B. Murmann 3 – Class-AB • Output can provide large drive currents “on demand” EE114 (HO #26) Topics EE114 – Class-A OTAs with single ended outputs – Overview of commonly used architectures • Telescopic OTA, Folded Cascode OTA, Current Mirror OTA, Two-stage OTA – Frequency response and stability in capacitive feedback configuration EE315A – Continuous-time and switched-capacitor filters using fully differential OTAs R. Dutton, B. Murmann 4 – Analysis of noise performance – Analysis of transient behavior – Design methodology for short-channel technologies EE114 (HO #26)
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/09/2009 for the course EE 114 at Stanford.

Page1 / 12

ho26.l23_ota1 - OTA Feedback Circuits Feedback...

This preview shows document pages 1 - 3. Sign up to view the full document.

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