High linearity components simplify direct conversion receiver designs
Cheng-Wei Pei
Abstract
Signal chain devices that offer high linearity and excellent noise specifications and can greatly simplify the design of high frequency receivers are described.
Keywords
RMS to DC conversion
LT5575 direct conversion demodulator
LTC6406 amplifier
LTC2299 14-bit ADC
Introduction
A direct conversion radio receiver takes a high frequency input signal, often in the 800MHz to 3GHz frequency range, and utilizes one mixer/demodulator stage to convert the signal to baseband without going through an intermediate frequency (IF) stage. The resulting low frequency (baseband) signal spectrum has useful information at frequencies from DC to typically ...
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