An analog BiCMOS integrated circuit for front-end RDS decoder

1991 ◽  
Vol 37 (3) ◽  
pp. 585-591 ◽  
Author(s):  
A. Baschirotto ◽  
M. Cassis ◽  
P. Kirchlechner ◽  
F. Montecchi ◽  
G. Palmisano ◽  
...  
Keyword(s):  
Integrated Circuit ◽  
Front End

scholarly journals Design and Implementation of a Farrow-Interpolator-Based Digital Front-End in LTE Receivers for Carrier Aggregation

Electronics ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 231
Author(s):  
Chester Sungchung Park ◽  
Sunwoo Kim ◽  
Jooho Wang ◽  
Sungkyung Park
Keyword(s):  
Integrated Circuit ◽  
Building Block ◽  
Orthogonal Frequency Division Multiplexing ◽  
Critical Path ◽  
Phase Error ◽  
System Level ◽  
Comb Filter ◽  
Carrier Aggregation ◽  
Path Delay ◽  
Front End

A digital front-end decimation chain based on both Farrow interpolator for fractional sample-rate conversion and a digital mixer is proposed in order to comply with the long-term evolution standards in radio receivers with ten frequency modes. Design requirement specifications with adjacent channel selectivity, inband blockers, and narrowband blockers are all satisfied so that the proposed digital front-end is 3GPP-compliant. Furthermore, the proposed digital front-end addresses carrier aggregation in the standards via appropriate frequency translations. The digital front-end has a cascaded integrator comb filter prior to Farrow interpolator and also has a per-carrier carrier aggregation filter and channel selection filter following the digital mixer. A Farrow interpolator with an integrate-and-dump circuitry controlled by a condition signal is proposed and also a digital mixer with periodic reset to prevent phase error accumulation is proposed. From the standpoint of design methodology, three models are all developed for the overall digital front-end, namely, functional models, cycle-accurate models, and bit-accurate models. Performance is verified by means of the cycle-accurate model and subsequently, by means of a special C++ class, the bitwidths are minimized in a methodic manner for area minimization. For system-level performance verification, the orthogonal frequency division multiplexing receiver is also modeled. The critical path delay of each building block is analyzed and the spectral-domain view is obtained for each building block of the digital front-end circuitry. The proposed digital front-end circuitry is simulated, designed, and both synthesized in a 180 nm CMOS application-specific integrated circuit technology and implemented in the Xilinx XC6VLX550T field-programmable gate array (Xilinx, San Jose, CA, USA).

A Floating-Gate-Based Four-Channel Reconfigurable Analog Front-End Integrated Circuit

2021 ◽  
Author(s):  
Zu-Jia Lo ◽  
Bipasha Nath ◽  
Yuan-Chuan Wang ◽  
Yun-Jie Huang ◽  
Hui-Chun Huang ◽  
...  
Keyword(s):  
Integrated Circuit ◽  
Floating Gate ◽  
Front End ◽  
Analog Front End

scholarly journals Backside Chippings Improvement through Wafer Dicing Parameter Optimization and Understanding the Anistropic Silicon Properties

2021 ◽  
pp. 144-152
Author(s):  
Aiza Marie E. Agudon ◽  
Bryan Christian S. Bacquian
Keyword(s):  
Integrated Circuit ◽  
Electronic Devices ◽  
Silicon Wafers ◽  
Form Complex ◽  
Work Related ◽  
Front End ◽  
Wafer Thickness ◽  
Fully Automatic ◽  
Direct Materials ◽  
Selection Of

Semiconductor Companies and Industries soar high as the trend for electronic gadgets and devices increases. Transition from “manual” to “fully automatic” application is one of the advantages why consumer adapt to changes and prefer electronic devices as one of daily answers. Individuals who admire these electronic devices often ask how they are made. As we look inside each device, we can notice interconnected microchips commonly called IC (Integrated Circuit). These are specially prepared silicon wafers where integrated circuit are developed. Commonly, each device is composed of numerous microchips depending on the design and functionality IC production is processed from “front-end” to “back-end” assembly. Front-end assembly includes wafer fabrication where electrical circuitry is prepared and integrated to every single silicon wafers. Back-end assembly covers processing the wafer by cutting into smaller individual and independent components called “dice”. Each dice will be placed into Leadframe, bonded with wires prior encapsulating with mold compounds. After molding, each IC will be cut through a process called singulation. Afterwards, all molded units are subjected for functional testing. Dice is central to each IC; it is where miniature transistor, resistor and capacitor are integrated to form complex small circuitry in microchips. Pre-assembly (Pre-assy) stations have the first hand prior to all succeeding stations. Live wafers are primary direct materials processed in these stations. Robust work instruction and parameter must be practiced during handling and processing to avoid gross rejection and possible work-related defects. The paper is all about the challenges to resolve and improved the backside chippings in 280um wafer thickness in mechanical dicing saw. The conventional Mechanical dicing process induce a lot of mechanical stress and vibration during the cutting process which oftentimes lead to backside chipping and die crack issues. However, backside chippings can mitigate with proper selection of parameter settings and understand the silicon wafer properties.

Characterization of Circuit Blocks for Configurable Analog-Front-End

2014 ◽  
Vol 2014 (HITEC) ◽  
pp. 000146-000153 ◽  
Author(s):  
Bruce W. Ohme ◽  
Mark R. Larson ◽  
Bhal Tulpule ◽  
Alireza Behbahani
Keyword(s):  
Embedded Systems ◽  
Integrated Circuit ◽  
Extreme Temperature ◽  
Silicon On Insulator ◽  
Instrumentation Amplifier ◽  
Signal Conditioning ◽  
Wafer Level ◽  
Voltage Range ◽  
Front End ◽  
Programmable Gain

Analog functions have been implemented in a Silicon-on-Insulator (SOI) process optimized for high-temperature (>225°C) operation. These include a linear regulator/reference block that supports input voltages up to 50V and provides multiple independent voltage outputs. Additional blocks provide configurable sensor excitation levels of up to 10V DC and/or 20V AC-differential, with current limiting and monitoring. A dual-channel Programmable-Gain-Instrumentation Amplifier (PGIA) and a high-level AC input block with programmable gain and offset serve signal conditioning, gain, and scaling needs. A multiplexer and analog buffer provide an output that is scaled and centered for down-stream A-to-D conversion. Limited component availability and high component counts deter development of sensing and control electronics for extreme temperature (>200°) applications. Systems require front-end power conditioning, sensor excitation and monitoring, response amplification, scaling, and multiplexing. Back-end Analog-to-Digital conversion and digital processing/control can be implemented using one or two integrated circuit chips, whereas the front-end functions require component counts in the dozens. The low level of integration in the available portfolio of SOI devices results in high component count when constructing signal conditioning interfaces for aerospace sensors. These include quasi-DC sensors such as thermo-couples, strain-gauges, bridge transducers as well as AC-coupled sensors and position transducers, such as Linear Variable Differential Transducers (LVDT's). Furthermore, a majority of sensor applications are best served by excitation/response voltage ranges that typically exceed the voltage range of digital electronics (either 5V or 3.3V in currently available digital IC's for use above 200°C). These constraints led Embedded Systems LLC to design a generic device which was implemented by Honeywell as an analog ASIC (Application Specific Integrated Circuit). This paper will describe the ASIC block-level capabilities in the context of the typical applications and present characterization data from wafer-level testing at the target temperature range (225C). This material is based upon work performed by Honeywell International under a subcontract from Embedded Systems LLC, funding for which was provided by the U.S. Air Force Small Business Innovative Research program.

A custom mixed-signal cmos integrated circuit for high performance pet tomograph front-end applications

2003 ◽  
Vol 50 (4) ◽  
pp. 909-914 ◽  
Author(s):  
B.K. Swann ◽  
J.M. Rochelle ◽  
D.M. Binkley ◽  
B.S. Puckett ◽  
B.J. Blalock ◽  
...  
Keyword(s):  
Integrated Circuit ◽  
High Performance ◽  
Mixed Signal ◽  
Cmos Integrated Circuit ◽  
Front End
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