Abstract:
The need for ultra-low power and area efficient analog -to- digital converters (ADCs) is pushing towards the use of low voltage CMOS dynamic comparators to maximize the p...Show MoreMetadata
Abstract:
The need for ultra-low power and area efficient analog -to- digital converters (ADCs) is pushing towards the use of low voltage CMOS dynamic comparators to maximize the power efficiency and speed. The conventional dynamic comparators have features like high input impedance, no static power dissipation and good robustness against noise and mismatch. The drawback is that large numbers of transistors are used to minimize the offset, so the speed of the comparator is degraded. Double tail comparators overcome the drawbacks in conventional comparator by reducing the stacking of transistors with low supply voltage with less delay. But the transconductance is low for this comparator. In low power double tail comparator, without complicating the design and by adding few transistors the positive feedback in the regeneration is strengthened with results in reduced delay time. In this paper delay analysis of different dynamic comparators are presented with respect to speed and supply voltage. Then based on the delay analysis results, the conventional dynamic comparator is modified in terms of transistor technology and architecture results as body driven comparator for fast operation even in ultra low supply voltages. Simulation results in 90nm CMOS technology reveals that the delay time is considerably reduced.
Published in: 2015 International Conference on Innovations in Information, Embedded and Communication Systems (ICIIECS)
Date of Conference: 19-20 March 2015
Date Added to IEEE Xplore: 13 August 2015
ISBN Information:
Keywords assist with retrieval of results and provide a means to discovering other relevant content. Learn more.
- IEEE Keywords
- Transistors ,
- Delays ,
- Noise ,
- Inverters ,
- Latches ,
- Capacitance ,
- Low voltage
- Index Terms
- High Speed ,
- Supply Voltage ,
- Simulation Results ,
- Positive Feedback ,
- Time Delay ,
- Low Voltage ,
- Analog-to-digital Converter ,
- Power Efficiency ,
- Ultra-low Power ,
- High Input Impedance ,
- Low Supply Voltage ,
- High Voltage ,
- Current Flow ,
- Rise Time ,
- Inverter ,
- Bias Voltage ,
- Input Voltage ,
- Output Node ,
- Fall Time ,
- Differential Pair ,
- Static Power Consumption ,
- Switching Transistors
- Author Keywords
Keywords assist with retrieval of results and provide a means to discovering other relevant content. Learn more.
- IEEE Keywords
- Transistors ,
- Delays ,
- Noise ,
- Inverters ,
- Latches ,
- Capacitance ,
- Low voltage
- Index Terms
- High Speed ,
- Supply Voltage ,
- Simulation Results ,
- Positive Feedback ,
- Time Delay ,
- Low Voltage ,
- Analog-to-digital Converter ,
- Power Efficiency ,
- Ultra-low Power ,
- High Input Impedance ,
- Low Supply Voltage ,
- High Voltage ,
- Current Flow ,
- Rise Time ,
- Inverter ,
- Bias Voltage ,
- Input Voltage ,
- Output Node ,
- Fall Time ,
- Differential Pair ,
- Static Power Consumption ,
- Switching Transistors
- Author Keywords