S. Sankaran - Academia.edu (original) (raw)

Papers by S. Sankaran

2009 IEEE International Solid-State Circuits Conference - Digest of Technical Papers, 2009

IEEE Journal of Solid-State Circuits, 2014

ABSTRACT This paper presents a 160 GHz center frequency pulsed 65 nm CMOS transceiver for short r... more ABSTRACT This paper presents a 160 GHz center frequency pulsed 65 nm CMOS transceiver for short range radar applications. Four phased array transceivers were implemented in a single chip with antennas implemented in a BGA package. The implemented transmitter is capable of producing pulses of 100 ps widths ($>$20 GHz RF bandwidth) at a 160 GHz carrier frequency. The measured effective isotropic radiated power (EIRP) is 18.8 dBm for continuous wave outputs. The analog beam forming receiver achieves an overall gain of 42.5 dB, −-−14 dBm rmIP1rmdB{rm IP}_{1{rm dB}}rmIP1rmdB, 7 GHz bandwidth, and a noise figure of 22.5 dB. The sliding window time-dilation baseband relaxes the output data rate and subsequent digital processing requirements. Fine grained duty cycling reduces power dissipation. The entire chip consumes 2.2 W from 1.2/1.4 V supplies in a 65 nm digital CMOS process.

IEEE Journal of Solid-State Circuits, 2009

Abstract The first mm-wave Schottky diode frequency doubler fabricated in CMOS is demonstrated. T... more Abstract The first mm-wave Schottky diode frequency doubler fabricated in CMOS is demonstrated. The doubler built in 130-nm CMOS uses a balanced topology with two shunt Schottky barrier diodes, and exhibits~ 10-dB conversion loss as well as-1.5-dBm output ...

Biomechanics and Modeling in Mechanobiology, 2010

A computational vascular fluid-structure interaction framework for the simulation of patient-spec... more A computational vascular fluid-structure interaction framework for the simulation of patient-specific cerebral aneurysm configurations is presented. A new approach for the computation of the blood vessel tissue prestress is also described. Simulations of four patient-specific models are carried out, and quantities of hemodynamic interest such as wall shear stress and wall tension are studied to examine the relevance of fluid-structure interaction modeling when compared to the rigid arterial wall assumption. We demonstrate that flexible wall modeling plays an important role in accurate prediction of patient-specific hemodynamics. Discussion of the clinical relevance of our methods and results is provided.

International Symposium on VLSI Technology, Systems and Applications, 2010

High volume millimeter wave applications are emerging. With the speed improvement of CMOS, sub-mi... more High volume millimeter wave applications are emerging. With the speed improvement of CMOS, sub-millimeter wave operation of CMOS circuits appears to be possible. In traditional millimeter and sub-millimeter wave systems, discrete Schottky diodes are widely utilized. This paper reviews the high frequency performance of junction and Schottky diodes fabricated in CMOS without any process modification, and circuits using the diodes,

IEEE Custom Integrated Circuits Conference 2006, 2006

The feasibility of integrating antennas and required circuits to form wireless interconnects in f... more The feasibility of integrating antennas and required circuits to form wireless interconnects in foundry digital CMOS technologies has been demonstrated. The key challenges including the effects of metal structures associated with integrated circuits, heat removal, packaging, and interaction of transmitted and received signals with nearby circuits appear to be manageable. This technology can potentially be used for intra and inter-chip interconnection, and implementation of true single chip radios, beacons, radars, RFID tags and others, as well as contact-less high frequency testing.

2009 IEEE International Solid-State Circuits Conference - Digest of Technical Papers, 2009

IEEE Journal of Solid-State Circuits, 2014

ABSTRACT This paper presents a 160 GHz center frequency pulsed 65 nm CMOS transceiver for short r... more ABSTRACT This paper presents a 160 GHz center frequency pulsed 65 nm CMOS transceiver for short range radar applications. Four phased array transceivers were implemented in a single chip with antennas implemented in a BGA package. The implemented transmitter is capable of producing pulses of 100 ps widths ($>$20 GHz RF bandwidth) at a 160 GHz carrier frequency. The measured effective isotropic radiated power (EIRP) is 18.8 dBm for continuous wave outputs. The analog beam forming receiver achieves an overall gain of 42.5 dB, −-−14 dBm rmIP1rmdB{rm IP}_{1{rm dB}}rmIP1rmdB, 7 GHz bandwidth, and a noise figure of 22.5 dB. The sliding window time-dilation baseband relaxes the output data rate and subsequent digital processing requirements. Fine grained duty cycling reduces power dissipation. The entire chip consumes 2.2 W from 1.2/1.4 V supplies in a 65 nm digital CMOS process.

IEEE Journal of Solid-State Circuits, 2009

Abstract The first mm-wave Schottky diode frequency doubler fabricated in CMOS is demonstrated. T... more Abstract The first mm-wave Schottky diode frequency doubler fabricated in CMOS is demonstrated. The doubler built in 130-nm CMOS uses a balanced topology with two shunt Schottky barrier diodes, and exhibits~ 10-dB conversion loss as well as-1.5-dBm output ...

Biomechanics and Modeling in Mechanobiology, 2010

A computational vascular fluid-structure interaction framework for the simulation of patient-spec... more A computational vascular fluid-structure interaction framework for the simulation of patient-specific cerebral aneurysm configurations is presented. A new approach for the computation of the blood vessel tissue prestress is also described. Simulations of four patient-specific models are carried out, and quantities of hemodynamic interest such as wall shear stress and wall tension are studied to examine the relevance of fluid-structure interaction modeling when compared to the rigid arterial wall assumption. We demonstrate that flexible wall modeling plays an important role in accurate prediction of patient-specific hemodynamics. Discussion of the clinical relevance of our methods and results is provided.

International Symposium on VLSI Technology, Systems and Applications, 2010

High volume millimeter wave applications are emerging. With the speed improvement of CMOS, sub-mi... more High volume millimeter wave applications are emerging. With the speed improvement of CMOS, sub-millimeter wave operation of CMOS circuits appears to be possible. In traditional millimeter and sub-millimeter wave systems, discrete Schottky diodes are widely utilized. This paper reviews the high frequency performance of junction and Schottky diodes fabricated in CMOS without any process modification, and circuits using the diodes,

IEEE Custom Integrated Circuits Conference 2006, 2006

The feasibility of integrating antennas and required circuits to form wireless interconnects in f... more The feasibility of integrating antennas and required circuits to form wireless interconnects in foundry digital CMOS technologies has been demonstrated. The key challenges including the effects of metal structures associated with integrated circuits, heat removal, packaging, and interaction of transmitted and received signals with nearby circuits appear to be manageable. This technology can potentially be used for intra and inter-chip interconnection, and implementation of true single chip radios, beacons, radars, RFID tags and others, as well as contact-less high frequency testing.