In this article, we present an integrated broadband complementary metal-oxide semiconductor single-chip transceiver suitable for the realization of multi-nuclear pulsed nuclear magnetic resonance (NMR) probes. The realized single-chip transceiver can be interfaced with on-chip integrated microcoils or external LC resonators operating in the range from 1 MHz to 1 GHz. The dimension of the chip is about 1 mm(2). It consists of a radio-frequency (RF) power amplifier, a low-noise RF preamplifier, a frequency mixer, an audio-frequency amplifier, and fully integrated transmit-receive switches. As specific example, we show its use for multi-nuclear NMR spectroscopy. With an integrated coil of about 150 μm external diameter, a (1)H spin sensitivity of about 1.5 × 10(13) spins/Hz(1/2) is achieved at 7 T.
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http://dx.doi.org/10.1063/1.4916206 | DOI Listing |
We demonstrate a monolithic frequency-modulated continuous-wave (FMCW) lidar chip with an integrated transceiver array based on lens-assisted beam steering (LABS) technology. It enables beam emitting, steering, receiving, and coherent detecting on a single chip with simultaneous distance and velocity detection. An integrated transceiver is designed with a composite structure of a Bragg grating in the middle and a U-shaped photodetector (PD) surrounding it.
View Article and Find Full Text PDFWe demonstrate a monolithic transceiver based on a CMOS-compatible silicon photonic platform for lens-assisted beam-steering (LABS) light detecting and ranging (Lidar) application. By implementing an on-chip two-dimensional transceiver array and off-chip lens, beam emitting, steering, and receiving are realized simultaneously on a single chip. The transceiver is designed with a structure of a U-shaped vertical Ge photodetector surrounding a grating for high-efficiency light transmission and reception.
View Article and Find Full Text PDFDedicated indoor radio access network (RAN, such as C-RAN with fronthaul) will be in urgent demand for 5G and beyond ((B)5G), as it becomes more difficult for outdoor base stations to serve indoor mobile/IoT terminals due to the loss issue induced by higher carrier frequency. One cost-effective and time-saving strategy for indoor (B)5G RAN is to reuse the legacy multimode fibers (MMF) deployed in buildings and premises worldwide. In this work, we introduce the concept of indoor (B)5G fronthaul over legacy MMF based on analog-to-digital-compression (ADX), termed as ADX-RoMMF.
View Article and Find Full Text PDFIEEE Trans Biomed Circuits Syst
December 2020
A single-chip Gaussian monocycle pulse (GMP) transceiver was developed for radar-based microwave imaging by the use of 65-nm complementary metal oxide semiconductor (CMOS) technology. A transmitter (TX) generates GMP signals, whose pulse widths and -3 dB bandwidths are 192 ps and 5.9 GHz, respectively.
View Article and Find Full Text PDFSensors (Basel)
March 2020
EECS Department, UC Berkeley, 94720-1770 Berkeley, CA, USA.
We report the first time-synchronized protocol stack running on a crystal-free device. We use an early prototype of the Single-Chip micro Mote, SCµM, a single-chip 2×3 mm 2 mote-on-a-chip, which features an ARM Cortex-M0 micro-controller and an IEEE802.15.
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