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Ring oscillator is versatile devise based on CMOS designed for temperature sensor to replace the conventional temperature sensor for optimized the application specific circuits which are vulnerable in temperature variations. Sensors like RTD, Thermocouple, Therimoristor and IC are often used within electronic systems to monitor temperature and provide protection from excessive temperature excursions...
Voltage controller oscillator (VCO) based CMOS temperature sensors are capable of lower power operation (albeit at the cost of sensitivity and resolution) than their BJT counterparts. The power consumption of the sense and conversion blocks is much lower than the VCO itself and hence any further power reduction would be a daunting task. In this work, we compare the performance of three types of VCOs...
In this paper, a low-power ring oscillator-based temperature sensor designed for U-healthcare is presented. Unlike conventional temperature sensors relying on power-hungry bandgap references and ADCs, the proposed sensor exploits the frequency of the ring oscillator that increases as temperature increases as a way of converting temperature to a digital output. Power of the sensor is also saved by...
Polymorphic gates can be considered as a new reconfigurable technology capable of integrating logic functions with sensing in a single compact structure. Polymorphic gates whose logic function can be controlled by the level of the power supply voltage (Vdd) represent a special class of polymorphic gates. A new polymorphic NAND/NOR gate controlled by Vdd is presented. This gate was fabricated and utilized...
This paper describes a design flow for the circuit-level optimization of a technology. The concurrent exploration of device characteristics and library design choices leads to a more application-optimal technology. We illustrate the design flow by: 1) analyzing the impact of buffer cell design, and 2) by optimizing a 130 nm technology for low operational power.
In deep submicron era, to prevent larger amount of SRAM from more frequently encountered overheating problems and react accordingly for each possible hotspots, multiple ideal run-time temperature sensors must be closely located and response rapidly to secure system reliability while maintaining core frequency. This paper presented a method to extract run-time temperature information from multiple...
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