4 results
Now showing1 - 4 of 4
- Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Bidirectional system on chip for intracorporeal pressure measurement(2014); A multichannel pressure sensing integrated circuit utilizing wireless power and wireless data transmission for measuring blood pressure using a capacitive pressure sensor. The entire system is integrated onto an application specific integrated circuit designed using 130nm CMOS technology.Publicationtype: Doctoral Thesis421 1179 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , The design of a fully differential capacitive pressure sensor with unbalanced parasitic input capacitances in 130nm CMOS technologyA switched capacitor amplifier for measuring absolute pressure with a micro-machined capacitive pressure sensor using correlated double sampling has been designed in 130nm CMOS technology. The switched capacitor amplifier design uses a combination of correlated double sampling, input offset cancellation, and output offset cancellation to help reject 1/f noise and DC offset mismatch. A method for sizing the operational transconductance amplifier (OTA) components according to the system noise, accuracy, and bandwidth requirements is presented.Publicationtype: Conference Paper52 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , A gain boosted folded cascode using telescopic boosting amplifiers with switched capacitor input level shiftersThis paper describes a single stage fully differential folded cascode operational transconductance amplifier (OTA) with fully differential gain boosting amplifiers designed in 1.2 VDC 130nm CMOS process technology. The amplifier is the driver for the analog to digital converter (ADC) of a blood pressure sensing medical implant [1] which uses wireless power transmission as its energy source [2]. The medical implant's design specifications require an amplifier with wide output swing, high accuracy, and the bandwidth to drive a differential 5 pF load at 4 ksps with minimum power consumption. The gain boosting amplifiers are telescopic cascoded amplifiers, which, by their design, have an input and output common mode voltage relationship which is opposite to what is needed for a gain boosted cascode configuration. To correct for this, a method for DC shifting the amplifier's input voltage using a switched capacitor network is presented.Publicationtype: Conference Paper160 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Wireless power transmission for powering medical implants situated in an abdominal aortic aneurysmThis paper will describe a wireless power transmission system which has been used during in vivo testing to power a blood pressure sensing implant [1] located inside the abdominal aorta of a 100 kg swine. Wireless power transmission is accomplished using an external power sender which is magnetically coupled to an RF energy harvester block which has been integrated into the medical implant's system package. The power sender is a class E amplifier which drives a wire loop antenna at 4 MHz, and the power receiver uses a ferro-magnetic core in an LC resonant circuit coupled to a Schottky diode charge pump rectifier followed by a DC voltage regulator. © 2012 by Walter de Gruyter. Berlin. Boston.Publicationtype: Journal Article129