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Altera_Forum's avatar
Altera_Forum
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10 years ago

Amplifiers in CPLD

Dear All,

For low cost CPLD(eg. EPM570), is it possible to realize amplifiers function? The function is very like pre-amplify circuit(ex. LMV358 amplifier).

My target is to enlarge doppler signal(small signal, 20mV, less than 1KHz) after AD acquire, just use inner program to realize amplify. In order to reduce complexity, I do not want to use outside pre-amplify circuit.

If possible, would you please help share related experience with me? Thanks a lot in advance.

Best Regards,

Mark

3 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    10 years ago

    Thanks for you reply.

    Yes, I use the external ADC for signal acquiring. And, my target is realize inner amplifier program(the function of which is very like the pre-amplifier or auto gain control) after AD acquiring.

    Thanks.
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    10 years ago

    --- Quote Start ---

    Thanks for you reply.

    Yes, I use the external ADC for signal acquiring. And, my target is realize inner amplifier program(the function of which is very like the pre-amplifier or auto gain control) after AD acquiring.

    Thanks.

    --- Quote End ---

    Yes, you can multiply the ADC values by a number then scale the output to the range/ number of bits you're looking for.