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Design >> Mixed-Signal Design >> Qty of Samples Sample Required for Sin Wave??
https://designers-guide.org/forum/YaBB.pl?num=1175983678

Message started by pilotcj525 on Apr 7^th, 2007, 3:07pm

Title: Qty of Samples Sample Required for Sin Wave??
Post by pilotcj525 on Apr 7^th, 2007, 3:07pm

Just a basic question. How many data points are required to adequetly approximate a sin wave. Say the sine wave has a frequency of 40 MHz, and will be output from a 10-bit DAC, and then mixed with 175 to 500 MHz.

Does the final up-converter frequency factor in on how approximaet the sine wave can be? Basically, I'm just trying to do some sizing calculations for a concept in software defined radio.

-John

Title: Re: Qty of Samples Sample Required for Sin Wave??
Post by Andrew Beckett on Apr 11^th, 2007, 6:30am

Two points should be sufficient (Nyquist...)

It rather depends on what you mean by "adequate"?

Andrew.