Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

CIC and FIR megacores

Dear Forum I have designed a narrowband LPF using matlab which comprises a 12 stage CIC decimating filter with a decimation rate of 495. This is followed by a 361 tap Compensating FIR. This co...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

If the input sample rate is 93 MHz, than the CIC output rate is 93/495 = 188 kHz. If the FIR filter is following the CIC, it's supposed to work at 188 kHz sampling rate, that's the purpose of a decimation filter.