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IF Quadrature Demodulator

Mon, 02/02/2004 - 8:06am

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A monolithic, high performance IF quadrature demodulator from Linear Technology operates with a supply voltage as low as 1.8V, making it suitable for portable applications. The LT5546 has applications in GPS receivers, wireless local loop, satellite IF receivers, and mobile wireless data receivers. The device accepts an IF input signal from 40 MHz to 500 MHz. It incorporates a quadrature phase-shifter for accurate I/Q demodulation and a low distortion VGA with a log-linear gain control range from ףdB to 56dB. The LTC5546 is offered in a 4mm × 4mm 16-lead plastic QFN surface mount package.

Linear Technology Corporation

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