Profile: CML Microcircuits (USA), Inc. designs, develops and supplies low-power analogue, digital and mixed-signal semiconductors for telecommunications systems. Our products include two way radio, wireless data, embedded products, RF products, telephony and wireline data. The CMX991 is a single-chip, RF quadrature transceiver that provides the core functions required to implement a full-featured radio transmitter and receiver. It operates from 100MHz to 1GHz and its I/Q architecture supports multiple modulation types and bandwidths with a single radio design. The half-duplex CMX991 integrates Tx modulators, Rx demodulators, IF PLL and IF VCO subsystems to minimise the external circuits needed when implementing a complete transceiver. The CMX885 is a half-duplex, audio, signalling and data processing IC for use in marine VHF radio systems.