CHAPTER 4

Gm-C integrators for low-power and low voltage applications. A gaussian polyphase filter for mobile transceivers in 0.35


Prev TOC Next

4.1. Introduction

At low supply voltage, the key problem of analog signal processing functions is dynamic range reduction [1], [2]. This is especially severe in mixed mode systems due to the cross-talk produced by adjacent digital functions. For this reason, a key target is to keep the largest possible voltage swing. Bipolar based transconductors can be widely tuned with negligible variation in the VBE voltage [3]. At low supply voltage, this does not impose restrictions on tunability of the transconductors. On the contrary, in CMOS transconductors, large tunability needed to correct for temperature and process variations gives a significant reduction in voltage swing at low supply voltages [3]. The new technologies are optimized towards digital applications and therefore, modern MOST’s, suffer from second order effects like velocity saturation and mobility reduction. New transconductor concepts which do not rely upon the ideal square law of a MOST, are needed. Another issue is to achieve large tunability without conflicting with the large swing requirement.


Harris

Featured Video
Jobs
GIS Analyst for G2 Partners LLC at San Ramon, CA
GIS Software Developer for UDC at Englewood, CO
Vice President, Transportation Services for Associated General Contractors of New York State at Albany, NY
Architectural Designer for Champion Home Builders at Troy, MI
Upcoming Events
GIS-PRO 2017 at Jacksonville FL - Oct 23 - 26, 2017
GEO WEEK 2017 at Washington DC - Oct 23 - 27, 2017
Commercial UAV EXPO Americas at The Westgate Resort Las Vegas NV - Oct 24 - 26, 2017
6th International Colloquium on Scientific and Fundamental Aspects of GNSS / Galileo at Technical University of Valencia Valencia Spain - Oct 25 - 27, 2017
Teledyne Optech
CADalog.com - Countless CAD add-ons, plug-ins and more.



Internet Business Systems © 2017 Internet Business Systems, Inc.
25 North 14th Steet, Suite 710, San Jose, CA 95112
+1 (408) 882-6554 — Contact Us, or visit our other sites:
AECCafe - Architectural Design and Engineering EDACafe - Electronic Design Automation TechJobsCafe - Technical Jobs and Resumes  MCADCafe - Mechanical Design and Engineering ShareCG - Share Computer Graphic (CG) Animation, 3D Art and 3D Models
  Privacy PolicyAdvertise