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Other packaging needs
Published in Andrea Chen, Randy Hsiao-Yu Lo, Semiconductor Packaging, 2016
Andrea Chen, Randy Hsiao-Yu Lo
Packaging needs for digital image sensors have their own special requirements. For one thing, the sensors need to “see,” so nothing opaque can cover the chip surface. Also, the sensor surface and the clear cover must be kept extremely clean and handled carefully, so that dust and scratches do not degrade the image capture quality. Image sensor packages may come in many different formats, all derived from established package types. One of the more commonly used ones is the LCC (leadless chip carrier); an example using a plastic molded body with an opening on the top surface for the image sensor is shown in Figure 4.2. Images sensors packaged inside a LCC are cavity-up, wire bonded, and given a glass lid. They offer a small form factor and excellent thermal performance.
WiMAX Product Development Trends
Published in G. S. V. Radha Krishna Rao, G. Radhamani, WiMAX, 2007
G. S. V. Radha Krishna Rao, G. Radhamani
Low-cost and high-quality WiMAX 3.5-GHz Mini-PCI modules are available to OEM/ODMs worldwide. Wavesat and Sanmina-SCI, an EMS company, announced an agreement for production and cost optimization of the WiMAX mini-PCI. The low-cost, small-form factor WiMAX 3.5-GHz mini-PCI modules are available for volume delivery. The WiMAX mini-PCI modules are based on Wavesat’s recently launched WiMAX 3.5-GHz mini-PCI Reference Design, and incorporates Wavesat’s EvolutiveTM DM256 chipset and MAC coprocessor. Further, the WiMAX mini-PCI modules are fully compliant with the IEEE 802.16-2004 standard and offer easy upgradeability to 802.16e-2005 for basic mobility applications, as well as supporting TDD and HFDD 3.5- and 7.0-MHz bandwidths and modulation up to 64 QAM.
Design and Construction of Magnetic Storage Devices
Published in Bharat Bhushan, Handbook of Micro/Nano Tribology, 2020
Hirofumi Kondo, Hiroshi Takino, Hiroyuki Osaki, Norio Saito, Hiroshi Kano
It was 1972 that the very first system of the floppy disk drive, also known as the diskette drive, was introduced to the market from IBM. The IBM 3740 system utilized the 8-in, diskette with its formatted capacity of 243 kB. The track density was 48 TPI and the linear density was 3268 BPI. Later on, both linear density and the track density were increased and the single-sided magnetic head became a dual-sided head (see Figure 12.84). However, as the drive with a small form factor began to appear in the market, the 8-in, drive shrank in volume.
A novel home automation distributed server management system using Internet of Things
Published in International Journal of Ambient Energy, 2022
P. Manojkumar, M. Suresh, Alim Al Ayub Ahmed, Hitesh Panchal, Christopher Asir Rajan, A. Dheepanchakkravarthy, A. Geetha, B. Gunapriya, Suman Mann, Kishor Kumar Sadasivuni
For sensing temperature, the proposed system uses a Resistance Temperature Detector (RTD). PPG101A1 RTD is chosen for this device. It is a thin film platinum RTD with high accuracy and small form factor. It has virtually linear relationship with temperature and resistance. So the calibration and calculation of the temperature is easy that reduces the processing time. The output of an RTD is resistance. It cannot be directly connected to any device. So, resistance to the voltage conversion circuit is required to read the sensor value. For better accuracy and stability, a resistance bridge circuit is used to convert the RTD resistance into voltage. The output voltage of the bridge circuit is amplified with a high gain instrumentation amplifier. It gives a good Signal to Noise ratio (SNR) and programmable gain. So the calibration of the sensor value was made easy. These resistance bridges and instrumentation amplifiers were combined in a signal conditioning unit.
Point Positioning Capability of Compact, Low-Cost GNSS Modules: A Case Study
Published in IETE Journal of Research, 2021
Somnath Mahato, Atanu Santra, Sukabya Dan, P. Banerjee, Surajit Kundu, Anindya Bose
Over the last couple of years compact, power-efficient, and low-cost (50–200 USD) GNSS modules became commercially available. The modules have small form factor and they generally consume extremely low power. The modules can track and use signals from multiple GNSS constellations, operates in single or dual GNSS frequencies and can provide “raw” GNSS data along with National Marine Electronics Association (NMEA) data output at 1–5 Hz rate. Few of the modules are differential GNSS (dGNSS) and/ or Real Time Kinematic (RTK) enabled, so that these may be used as base and/ or rovers in RTK operation. These modules are increasingly being used for real-time and research applications of GNSS [18–21]. Three such modules used for the studies reported in this paper are compared in Table 1 along with a standard geodetic GNSS receiver [22–25].
Multi-port monostatic antenna system with improved interport isolation for 2.4GHz full duplex MIMO applications
Published in Electromagnetics, 2020
The spatial separation of Tx and the Rx antenna elements provides MIMO isolation in bistatic antenna configuration. However, such configuration impedes the implementation of antennas with small form-factor for realization of compact transceivers. The compact MIMO transceivers require multi-port monostatic patch antennas with improved MIMO isolation. In addition, such antennas should offer nice FD isolation to prevent the saturation of receiver from SI signals (Korpi et al. 2014). Moreover, the dual polarized antennas can be deployed for FD single-input single-output (FD-SISO) transceivers and SIC circuits (Nawaz and Tekin 2016) can provide additional isolation on top of intrinsic isolation of polarization diversity. However, the monostatic antennas for IBFD-MIMO applications may require isolated co-polarized ports to provide both MIMO and FD isolation. It is challenging task to achieve both types of interport isolation for multi-port monostatic radiator due to excitation of identical polarizations.