I was amazed that MC1496s were still being sold at DigiKey  ( ON  
Semiconductor ).
I had a lot of fun with them in the past.  Using the MC1496 seems  
harder than using
a switched capacitor filter.  Do you have the 3 frequencies available ?
Gus

> On Dec 9, 2009, at 4:22 AM, Bruno L. Albrecht wrote:
>
> I'm thinking about using a MC1496 (Balanced Modulator /  
> Demodulator). It
> seems to fit my needs, once I can sum the carrier to an on/off  
> switch, and
> then just demodulate the signal with the same carrier. And all of it  
> with
> only two cheap IC per frequency!
> What are your opinions?
>
> Cheers,
> Bruno
>
> On Thu, Dec 3, 2009 at 4:39 PM, Peter Restall <pete@restall.net>  
> wrote:
>
>>
>> On Wed, 2 Dec 2009 17:51:34 -0200, Bruno L. Albrecht wrote:
>>
>>> Hi,
>>> I'm trying to separate 3 frequency components from an analog  
>>> signal. The
>>> original signal is composed by the sum of 3 frequencies (1500,  
>>> 4000 and
>>> 10200 Hz) and some noise. The objective is to separate only those 3
>>> frequencies and evaluate their magnitudes. I thought about lots of  
>>> ways
>> of
>>> doing it, but couldn't get an effective one.
>>> Any ideas?
>>>
>>> Cheers,
>>> Bruno
>>>
>
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