Implementation of a Multipath Fully Differential OTA in 0.18-um CMOS Process
Objective
In this brief, two FVF cells are used as two nonlinear tail current sources with the capability of increasing the dynamic currents under large-signal operation, causing a high SR performance.
Abstract
The brief describes a fully differential transconductance amplifier (FDTA) that uses several input-to-output paths and traditional techniques such as positive feedback, nonlinear tail current sources, and current mirror-based paths to increase transconductance, leading to a larger DC gain and higher gain bandwidth (GBW) product.
Two flipped voltage-follower (FVF) cells are used as variable current sources to provide Class-AB operation and adaptive biasing of all other drivers. The structure also includes several input-to-output paths that act as dynamic current boosters during the slewing phase, improving the slew rate (SR) performance.
This design was implemented in a TSMC 0.18-µm CMOS process
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Block Diagram
Specifications
Software Requirements:
· Tool: Cadence virtuoso
· Technology files: GPDK 180nm
Hardware Requirements:
· Microsoft® Windows XP
· Intel® Pentium® 4 processor or Pentium 4 equivalent with SSE support
· 512 MB RAM
· 100 MB of available disk space
Learning Outcomes
Learning Outcomes:
- Introduction to Digital electronics
- Importance of Transistors
- MOS Fundamentals
- NMOS/PMOS/CMOS Technologies
- How to design circuits using Transistor logic?
- Scope of amplifiers in today’s world
- Use of feedback signals.
- Applications in Real time.
- OTA importance.
- Solution providing for real time problems
- Project Development Skills:
- Problem Analysis Skills
- Problem Solving Skills
- Logical Skills
- Designing Skills
- Testing Skills
- Debugging Skills
- Presentation skills
- Thesis Writing Skills
Paper Publishing
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