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.


Synopsys: Custom Compiler

Featured Video
Editorial
Peggy AycinenaWhat Would Joe Do?
by Peggy Aycinena
Real Intent: Leveraging on Investments
More Editorial  
Jobs
Senior Front-End RTL Design AE for EDA Careers at San Jose, CA
Analog Hardware Engineer for Teradyne Inc at San Jose, CA
Senior R&D Engineer...Timing Closure Specialist for EDA Careers at San Jose or Anywhere, CA
Field Application Engineer for Teradyne Inc at San Jose, CA
Technical Support Engineer EU/Germany/UK for EDA Careers at N/A, United Kingdom
FPGA Engineer for Teradyne Inc at San Jose, CA
Upcoming Events
CODES+ISSS 2017, Oct 15-20, 2017, Lotte Hotel, Seoul, South Korea at Lotte Hotel Seoul Korea (North) - Oct 15 - 20, 2017
DVCon 2017 Europe, Oct 16 - 17, 2017, Munich, Germany at Holiday Inn Munich City Centre Munich Germany - Oct 16 - 17, 2017
11th International Symposium on Networks-on-Chip (NOCS 2017) at Seoul Korea (South) - Oct 19 - 20, 2017



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 TechJobsCafe - Technical Jobs and Resumes GISCafe - Geographical Information Services  MCADCafe - Mechanical Design and Engineering ShareCG - Share Computer Graphic (CG) Animation, 3D Art and 3D Models
  Privacy PolicyAdvertise