CML launches RF quadrature modulator

CML Microcircuits, the 44 year-old Essex consumer IC company, has brought out a quadrature modulator chip for RF transmitters.

Called the CMX971, the chip succeeds the CMX970 IF/RF quadrature demodulator.

CML’s RF building block range is designed to provide ICs required for HF/VHF/UHF and professional radios, wireless data terminals, wireless microphones, marine and avionics radio systems.

The IC can be programmed via a serial bus or working in ‘direct control’ mode, which does not require connection to a serial controller.

In both modes programmable features include a local oscillator divider ratio (divide by 2 or 4) and linearity vs. noise optimisation. The device can operate over the RF output range of 20MHz – 1GHz with a power supply voltage of 3.0V – 3.6V.

The chip’s quadrature architecture supports a range of modulation formats and standards.

The chip provides translation from baseband I/Q signals to a modulated RF signal. The differential inputs are ideal for direct connection to standard modems and interface ICs such as CML’s CMX7163, CMX7164, CMX910, CMX981 and CMX7861.

The chip comes in an RF-optimised 16-lead VQFN package, measuring 4mm x 4mm x 1mm.

It is available now.

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