[Discuss-gnuradio] Programmable band-pass filters

[Elvis Dowson]

Hi,
       Are there any components that can be used to implement a programmable 
band-pass filter between the antenna and the LNA, of the RF front-end for an 
SDR application. 

I was wondering if there are an discrete components available that can be 
programmed by I2C or SPI, that can be controlled by an FPGA, to tune the 
band-pass filter in between the antenna and the LNA.

Best regards,

Elvis