Direct demodulator

Skyworks Solutions has introduced a direct quadrature demodulator with integrated low-noise amplifier for the 5 GHz band.

The demodulator provides the flexibility to design receivers for various licensed and unlicensed broadband wireless data systems using low-cost and low-power direct conversion architecture.

In addition, it is an RF solution for WiMAX, dedicated short range communications, 802.11, 5.8 GHz industrial and medical RFID readers, and proprietary wireless data links.

The device offers good quadrature accuracy performance, noise figure and linearity specifications, making it suitable for the most difficult modulation formats, including 64-quadrature amplitude modulation orthogonal frequency division multiplexing.

The internal 'no-pull' architecture offsets the voltage-controlled oscillator from the carrier frequency by 3:2. This architecture eliminates LO pulling and dynamic direct current offset issues.

The demodulator operates from 4.9 to 5.925 GHz (at an LO range of 3.2 to 3.9 GHz), has a 6 dB noise figure and an input 1 dB compression point of -15 dBm. It operates at 3.3 V at a current consumption of 35 mA.