A low-voltage CMOS OTA with rail-to-rail differential input range

2000 ◽  
Vol 47 (1) ◽  
pp. 1-8 ◽  
Author(s):  
M.F. Li ◽  
U. Dasgupta ◽  
X.W. Zhang ◽  
Yong Ching Lim
Keyword(s):  
Low Voltage ◽  
Differential Input ◽  
Rail To Rail ◽  
Input Range

Low Voltage Differential Input Stage With Improved CMRR and True Rail-to-Rail Common Mode Input Range

2008 ◽  
Vol 55 (12) ◽  
pp. 1229-1233 ◽  
Author(s):  
Jaime RÁmirez-Angulo ◽  
Sandhana Balasubramanian ◽  
Antonio J. LÓpez-Martin ◽  
RamÓn G. Carvajal
Keyword(s):  
Low Voltage ◽  
Common Mode ◽  
Input Stage ◽  
Differential Input ◽  
Rail To Rail ◽  
Input Range

An Ultra-Low-Voltage CMOS Process-Insensitive Self-Biased OTA With Rail-to-Rail Input Range

2015 ◽  
Vol 62 (10) ◽  
pp. 2380-2390 ◽  
Author(s):  
Omar Abdelfattah ◽  
Gordon W. Roberts ◽  
Ishiang Shih ◽  
Yi-Chi Shih
Keyword(s):  
Low Voltage ◽  
Cmos Process ◽  
Rail To Rail ◽  
Input Range

Low voltage low power 8-bit folding/interpolating ADC with rail-to-rail input range

2009 ◽  
Vol 61 (2) ◽  
pp. 181-189 ◽  
Author(s):  
Hamid Movahedian Attar ◽  
Mehrdad Sharif Bakhtiar
Keyword(s):  
Low Power ◽  
Low Voltage ◽  
Rail To Rail ◽  
Input Range

scholarly journals Voltage-to-Frequency Converter for Low-Power Sensor Interfaces

1970 ◽  
pp. 5
Author(s):  
C. Azcona ◽  
B. Calvo ◽  
N. Medrano ◽  
S. Celma
Keyword(s):  
Low Power ◽  
Sensor Node ◽  
Low Voltage ◽  
Frequency Converter ◽  
Frequency Resolution ◽  
Sleep Mode ◽  
Output Frequency ◽  
Voltage Range ◽  
Rail To Rail ◽  
Input Range

This work presents a low-power rail-to-rail temperature compensated voltage-to-frequency converter (VFC) which constitutes the last stage of a sensor read-out interface targeting wireless sensor networks (WSN) applications. These quasi-digital converters are now receiving great interest, since they combine the simplicity of analog devices with the accuracy and noise immunity proper to digital signal processing; besides, frequency output is directly driven to the embedded node microcontroller C, which next performs the A/D conversion using its internal timers. A first read-out interface prototype using low-voltage low-power commercial components shows that the VFC means 99 % of the total interface consumption in read-out mode. Further, existing CMOS VFCs in the form of ASICs have a rather limited input range and an unsuitable output frequency span for typical C clock frequencies used in WSN. Hence, a novel full custom VFC solution is needed, fullfilling the main requirements of rail-to-rail operation, to take advantage of the full supply voltage range to optimize the output frequency resolution, and low-power low-voltage operation to have a power supply compatible with conventional WSN batteries while maximizing the operating life of the sensor node. Experimental results for a 0.18–μm 1.2–V CMOS VFC implementation show for an input range of (0–1.2 V) an output frequency range of (0.1–1.0 MHz), adequate to digitize the signal with the direct counting method in the sensor node μC achieving 13 bits resolution. It has a power consumption of 60 μW (35 nW in sleep mode) and it is temperature insensitive for a temperature range of (-40, 120 ºC).

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