Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Angsuman Roy"'
Publikováno v:
MWSCAS
A current-mode photon-counting circuit is proposed for long-range LiDAR applications to interface with a microchannel plate (MCP) photomultiplier tube (PMT). Based on the idea of a current-mode comparator, the proposed topology combines a BiCMOS regu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2e979eef70356b8fa15e0b8b546ef06d
https://doi.org/10.1109/mwscas47672.2021.9531676
https://doi.org/10.1109/mwscas47672.2021.9531676
Autor:
Sachin P. Namboodiri, James Skelly, R. Jacob Baker, Francisco Mata-carlos, Angsuman Roy, Gonzalo Arteaga
Publikováno v:
MWSCAS
Photon counting techniques are becoming more critical in fields such as LiDAR, high energy physics (HEP) and positron emission tomography (PET). For space-based aerosol-cloud-ocean (ACO) LIDAR, the total aggregate photon flux signal has a very high d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0160ffef316b58485c62ef8b06f27de4
https://doi.org/10.1109/mwscas48704.2020.9184584
https://doi.org/10.1109/mwscas48704.2020.9184584
Autor:
Angsuman Roy, Leif A. Johansson, Carl Boone, George C. Valley, Thomas Justin Shaw, Steven Estrella, George A. Sefler, David Borlaug
Publikováno v:
2020 IEEE Photonics Society Summer Topicals Meeting Series (SUM).
A photonic integrated circuit comprised of an 11 cm multimode speckle waveguide, a 1x32 splitter, and a linear grating coupler array is fabricated and utilized to receive 2 GHz of RF signal bandwidth from 2.5 to 4.5 GHz using a 35 MHz mode locked las
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9a7e20f9cd156f615727922ecb6dd1de
https://doi.org/10.1109/sum48678.2020.9167169
https://doi.org/10.1109/sum48678.2020.9167169
Autor:
Sachin P. Namboodiri, James K. Mellott, Eric Monahan, R. Jacob Baker, Vikas Vinayaka, Angsuman Roy
Publikováno v:
MWSCAS
A low cost, low power substitute for expensive, high power high-speed analog-to-digital converters (ADCs) in some situations is presented. This circuit is called a variable fast transient digitizer (VFTD). This paper provides an overview of the desig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::133b3386df59142d621cbf6e14df3e58
https://doi.org/10.1109/mwscas.2019.8885189
https://doi.org/10.1109/mwscas.2019.8885189
Publikováno v:
MWSCAS
A digital silicon photomultiplier (SiPM) using segmentation technique is designed, simulated and fabricated in the AMS 0.35 µm SiGe BiCMOS process. The digital SiPM is intended for photon counting applications. The digital SiPM consists of 16 avalan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ef7b4e1be0f3777abaab615b4bf07fc
https://doi.org/10.1109/mwscas.2019.8884970
https://doi.org/10.1109/mwscas.2019.8884970
Autor:
Francisco Mata-carlos, James Skelly, Vikas Vinayaka, R. Jacob Baker, Shadden Abdalla, Sachin P. Namboodiri, Bryan Kerstetter, Daniel Senda, Angsuman Roy
Publikováno v:
ACM Great Lakes Symposium on VLSI
A monolithic photon-counting receiver consisting of an integrated silicon-photomultiplier and a current-mode analog-to-digital converter (ADC) was designed, simulated and fabricated in the AMS 0.35 μm SiGe BiCMOS process. The silicon photomultiplier
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f97bd562437cd5235a1bc1bd7a05f5e1
https://doi.org/10.1145/3299874.3318005
https://doi.org/10.1145/3299874.3318005
Autor:
Daniel Renner, Madison Woodson, Andreas Beling, R. Jacob Baker, Milan Mashanovitch, Steven Estrella, Angsuman Roy, Jesse S. Morgan, Kenneth Hay, Keye Sun
Publikováno v:
Physics and Simulation of Optoelectronic Devices XXVII.
Links at 1 micron offer key advantages over longer wavelength links. Both ultra-stable, low noise Nd:YAG lasers and high power efficiency, temperature-stable GaAs lasers operate at wavelengths around 1 micron. These components are particularly benefi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3e92fcfc36a64d5de27fa6dfabf289a6
https://doi.org/10.1117/12.2510627
https://doi.org/10.1117/12.2510627
Autor:
Leif A. Johansson, Steven Estrella, George C. Valley, David Borlaug, Thomas Justin Shaw, George A. Sefler, Angsuman Roy, Carl Boone
Publikováno v:
Optics Express. 29:19222
A photonic integrated circuit (PIC) comprised of an 11 cm long multimode speckle waveguide, a 1 × 32 splitter, and a linear grating coupler array is fabricated and utilized to receive 2 GHz of radio-frequency (RF) signal bandwidth from 2.5 to 4.5 GH
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a5785ff1fc5436c46062baa462cb085b
https://doi.org/10.1364/oe.408565
https://doi.org/10.1364/oe.408565
Autor:
R. Jacob Baker, Angsuman Roy
Publikováno v:
2015 IEEE Dallas Circuits and Systems Conference (DCAS).
A passive 2nd-order sigma-delta modulator using switched-capacitor based filters was designed, fabricated, and tested. A novel 2nd-order single feedback path topology is used. All circuitry is optimized for low power operation through the use of mini
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4dbe90ad27467cbda3159531e6408dd8
https://doi.org/10.1109/dcas.2015.7356584
https://doi.org/10.1109/dcas.2015.7356584
Publikováno v:
MWSCAS
An FPGA based 2nd-order passive KD1S sigma-delta modulator was designed, simulated and tested. The design is implemented on an Altera Cyclone IV EP4CE115 FPGA. All active components such as digital logic, clock circuitry, and registers are located in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ace89ac9d2bee7f0dbd8abe7d789f442
https://doi.org/10.1109/mwscas.2015.7282136
https://doi.org/10.1109/mwscas.2015.7282136