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SiRF Technology, Inc. was an American pioneer in the commercial use of GPS technology for consumer applications. The company was founded in 1995 and was headquartered in
SiRFstar V 5e - Qualcomm
{{Open Handset Alliance Members Global Positioning System Defunct semiconductor companies of the United States Defunct computer companies of the United States Defunct computer hardware companies
SiRF Technology, Inc. was an American pioneer in the commercial use of GPS technology for consumer applications. The company was founded in 1995 and was headquartered in San Jose, California
San Jose, officially the City of San José ( ; ), is a cultural, commercial, and political center within Silicon Valley and the San Francisco Bay Area. With a city population of 997,368 and a metropolitan area population of 1.95 million, it is ...
. Notable and founding members included Sanjai Kohli, Dado Banatao
Diosdado P. Banatao (born May 23, 1946) is a Filipino entrepreneur and engineer working in the high-tech industry, credited with having developed the first 10-Mbit Ethernet CMOS with silicon coupler data-link control and transceiver chip, the fir ...
, and Kanwar Chadha. The company was acquired by British firm CSR plc
CSR plc (formerly Cambridge Silicon Radio) was a multinational fabless semiconductor company headquartered in Cambridge, United Kingdom. Its main products were connectivity, audio, imaging and location chips. CSR was listed on the London Sto ...
in 2009, who were in turn subsequently acquired by American company Qualcomm
Qualcomm Incorporated () is an American multinational corporation headquartered in San Diego, California, and Delaware General Corporation Law, incorporated in Delaware. It creates semiconductors, software and services related to wireless techn ...
on 13 August 2015.
SiRF manufactured a range of patented GPS chipsets and software for consumer navigation devices and systems. The chips are based on ARM controllers integrated with low-noise radio receivers to decode GPS signals at very low signal levels (typically -160 dBm). SiRF chips also support SBAS to allow for differentially corrected positions.
SiRFstarIII
SiRFstarIII architecture is designed to be useful in wireless and handheldlocation-based services
Location-based service (LBS) is a general term denoting software services which use geographic data and information to provide services or information to users. LBS can be used in a variety of contexts, such as health, indoor object search, ent ...
(LBS) applications, for 2G, 2.5G, 3G asynchronous networks. The SiRFstarIII family comprises the GRF3w RF IC, the GSP3f digital section, and the GSW3 software that is API compatible with GSW2 and SiRFLoc. The chips have been adopted by major GPS manufacturers, including Sony, Micro Technologies, Garmin, TomTom and Magellan.
SiRFatlas IV
SiRFatlas IV is a multifunction location system processor and is meant for entry-level Personal Navigation Devices (PNDs). The SiRFatlas IV is a cheaper version of the very popular, but rather expensive SiRFPrima platform. Has GPS/Galileo baseband, LCD touch-screen controller, video input, 10-bit ADC and a high-speed USB 2.0.SiRFstarV
SiRFstarV chips, launched in 2012, are capable of tracking NAVSTAR,GLONASS
GLONASS (, ; ) is a Russian satellite navigation system operating as part of a radionavigation-satellite service. It provides an alternative to Global Positioning System (GPS) and is the second navigational system in operation with global cove ...
, Galileo
Galileo di Vincenzo Bonaiuti de' Galilei (15 February 1564 – 8 January 1642), commonly referred to as Galileo Galilei ( , , ) or mononymously as Galileo, was an Italian astronomer, physicist and engineer, sometimes described as a poly ...
, Compass
A compass is a device that shows the cardinal directions used for navigation and geographic orientation. It commonly consists of a magnetized needle or other element, such as a compass card or compass rose, which can pivot to align itself with No ...
, SBAS, and future GNSS signals. The SiRFusion platform integrates positioning from GNSS, terrestrial radio solutions such as Wi-Fi and cellular, and MEMS sensors including accelerometers, gyroscopes, and compasses. SiRFusion can then combine this real-time information with cellular base station and Wi-Fi access point location data, ephemeribased aiding information from the CSR Positioning Center (CPC) to generate accurate and reliable position updates.
Acquisition
On 10 February 2009, UK wireless chip company CSR announced it was buying SiRF in a share deal worth $136 million.References
External links
SiRFstar V 5e - Qualcomm
{{Open Handset Alliance Members Global Positioning System Defunct semiconductor companies of the United States Defunct computer companies of the United States Defunct computer hardware companies