Chipidea Microelectronics SA has again successfully qualified a Dual mode UMTs/GSM Baseband AFE-CI7185oa

March 7, 2003 - Designed in digital 0.18 µm mixmode CMOS, this CI7185oa includes the signal conversion and filtering functions necessary for Baseband DSP/Radio interface in UMTS and GSM applications.

The silicon area has been significantly reduced. A power down mode is included with less than 1uA current.

The Receive channels include offset calibration, anti-aliasing filtering, A-to-D conversion and digital filtering. The inputs can accept a wide range of common-mode levels to easily interface to the RF front-end. Both UMTS and GSM modes are available. The Transmit channels include digital filtering, D-to-A conversion, anti-imaging filtering and offset calibration. The output can drive directly RF modulators with no need for external components. Additional functions include an 10 bit ADC, four 10-bit DACs and a 12-bit DAC. An optional memory controls the Transmit Power Control DAC. All necessary bias and reference signals are generated internally with the need of few external de-coupling capacitors. Detail information can be provided on request.