University of Illinois Urbana-Champaign

Four-bit voltage controlled oscillator (VCO) based analog-to-digital converter (ADC)

Ng, Pei Han

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https://hdl.handle.net/2142/91556

Description

Title
Four-bit voltage controlled oscillator (VCO) based analog-to-digital converter (ADC)
Author(s)
Ng, Pei Han
Contributor(s)
Radhakrishnan, Chandrasekhar
Issue Date
2016-05
Keyword(s)
  • voltage controlled oscillator (VCO)
  • analog-to-digital converters (ADCs)
  • quantization
  • noise-shaping
Abstract
The performance of Analog-to-Digital Converters (ADCs) has become crucial as the field of wireless communication continues to advance. Voltage-controlled oscillator (VCO)-based quantization consists of a highly digital structure and can overcome the limitations of analog circuit design using highly scaled devices. This work presents the design and implementation of a four-bit VCO-based ADC. The VCO is based on eight cross-coupled differential amplifiers stages. The performance of this VCO is analyzed by tuning the input voltage from 0.55 V to 0.85 V and the inherent noise-shaping property of a VCO-based design is shown. The work also discusses the current limitations of a VCO-based approach and possible future work is identified.
Type of Resource
text
Language
en
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http://hdl.handle.net/2142/91556

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