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Cambridge Silicon Radio

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Title: Cambridge Silicon Radio  
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Subject: Silicon Fen, Cambridge Consultants, Trident Microsystems, List of University of Essex people, Ford Sync, List of system-on-a-chip suppliers, UbiNetics, Virata Corporation
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Cambridge Silicon Radio

CSR plc
Public limited company
Traded as Template:Lse
Industry Semiconductors
Founded 1998
Headquarters Cambridge, England, United Kingdom
Key people Ron Mackintosh (Chairman)
Joep van Beurden (CEO)
Will Gardiner (CFO)
Products Fabless semiconductor that includes connectivity, audio, imaging and GPS chips
Revenue US$1,025.4 million (2012)[1]
Operating income US$107.9 million (2012)[1]
Net income US$51.2 million (2012)[1]

CSR plc[2] (formerly Cambridge Silicon Radio) is a multinational fabless semiconductor company headquartered in Cambridge, United Kingdom. Its main products are connectivity, audio, imaging and location chips. It is the world's 13th-largest fabless semiconductor company by 2011 revenue.[3]

CSR is listed on the London Stock Exchange and is a constituent of the FTSE 250 Index.


The company was founded in 1998 and split away from Cambridge Consultants as Cambridge Silicon Radio or CSR in 1999. The founding directors, who were all at Cambridge Consultants at the time were Phil O'Donovan, James Collier and Glenn Collinson. It was first listed on the London Stock Exchange in 2004.[4]

In 2005 the company acquired Clarity Technologies, a leading Clear Voice Capture (CVC) business.[5] In 2005 CSR also acquired the 3G wireless (WCDMA/UMTS/HSDPA) technology company UbiNetics.[6] In 2007, CSR acquired Nordnav, a Swedish based GPS software company, and CPS, a Cambridge based GPS software company producing Enhanced GPS in partnership with Motorola.[7]

On 10 February 2009, CSR announced it was merging with SiRF, the biggest global supplier of GPS chips, in a share deal worth $136 million.[8]

28th July 2010, CSR announced the acquisition of Belfast-based APT Licensing Ltd. (APT) and its aptX audio technology.

On 21 February 2011, CSR announced it was merging with Zoran, a video and imaging technology company.[9]

On 1st May 2012, CSR acquired Direct Digital Feedback Amplifier (DDFA) technology, a proprietary, highly scalable digital Class-D audio amplifier technology.

On 6th June 2012, CSR announced that it has completed an asset purchase agreement to acquire the MAPX (formerly MAP-X) audio product line from Trident Microsystems, Inc.

On 17 July 2012, Samsung Electronics agreed to acquire CSR's mobile phone connectivity (Bluetooth and Wi-Fi) and location (GPS/GNSS) businesses and associated IP for US$310 million (£198 million).[10] As part of the deal Samsung acquired a stake of 4.9% in CSR.[10]


CSR’s products include platform solutions for Bluetooth, GPS, FM broadcasting, Wi-Fi, audio, imaging, and ARM processors.[11] After the Zoran merger, CSR also makes digital imaging products based on the MIPS architecture.[12][13]

CSR’s technologies are used in devices such as mobile phones, automotive infotainment and telematics systems, personal navigation devices (PNDs), Bluetooth headsets and headphone, personal computers (PCs), tablets, GPS recreational devices, digital cameras, gaming devices and personal and commercial tracking applications.


CSR has 23 offices in 12 countries:


External links

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