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Altera_Forum's avatar
Altera_Forum
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15 years ago

Gain control using fpga

Hi, i have four FIR filters and i want to control the gain in the output of each filter and then sum their outputs. The result is sended to an DAC. it is possible to control the gain in fpga...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Thank you Dave.

rigth now i'm using a Cyclone III DSP kit with a DAC of 270 MSPS. I'm using this kit to test and evaulate my sistem. My project is to build an hardware with such specificacions. For now i'm just testing and writing codes in VHDL.

My quaestion is: If i have a 14 bit DAC with maximum output voltage = 1Vp.

load = 50 ohms

output power per band = 0 dbm

power adjust : 20 db in steps of 1dB.

As i said, i need to sum 5 filters output and keep the number of bits.