(APT) and its aptX audio technology and in February 2011, CSR announced it was merging with Zoran, a video and imaging technology company. In February 2009, CSR announced it was merging with SiRF, the biggest global supplier of GPS chips, in a share deal worth $136 million in July 2010, CSR announced the acquisition of Belfast-based APT Licensing Ltd.
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. In 2005 the company acquired Clarity Technologies, a leading clear voice capture (CVC) business and UbiNetics, a 3G wireless ( WCDMA/ UMTS/ HSDPA) technology company.
It was first listed on the London Stock Exchange in 2004.
The founding directors, who were all at Cambridge Consultants at the time were Phil O'Donovan, James Collier and Glenn Collinson. The company was founded in 1998 and split away from Cambridge Consultants as Cambridge Silicon Radio or CSR in 1999.
