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Re: [Discuss-gnuradio] Quadrature demodulator update

From: Tanner Lovelace
Subject: Re: [Discuss-gnuradio] Quadrature demodulator update
Date: 11 Feb 2003 11:50:05 -0500

On Tue, 2003-02-11 at 03:33, Ian Wraith wrote:
> Hello
>       Just a quick update on my little quadrature demodulator project
> which all being well will enable me to do some GNU Radio development. It
> takes a low level 10.7 MHz IF from a receiver amplifies this with a
> MSA-0886 MMIC then demodulates this with a RF2711 quadrature demodulator
> IC from RF Micro Devices. The I & Q outputs of the RF2711 turned out to be
> rather low level so I used a pair of OPA340 single supply op amps to
> amplify them to a reasonable level. These signals are then feed into the
> stereo inputs of my soundcards line input.
Any chance you could post the circuit plans here?

Tanner Lovelace
Tanner Lovelace | lovelace(at)wayfarer.org | http://wtl.wayfarer.org/
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