A chip can do amplification, but for selectivity you need filters: LC, ceramic or crystal are the usual technologies used at HF. Alternatively, there is the software-defined-radio approach, in which most of the filtering is done digitally.
For receiving a single fixed frequency the simplest techniques might be either TRF with reaction, or direct conversion (also known as zero IF). Google will help you.
For receiving a single fixed frequency the simplest techniques might be either TRF with reaction, or direct conversion (also known as zero IF). Google will help you.
Thanx guys.. i googled and found out this receiver front end:
http://www.qrp.pops.net/images/before 2008/wwv_10MHz_Files/WW1.GIF
I am thinking of building that one out...
http://www.qrp.pops.net/images/before 2008/wwv_10MHz_Files/WW1.GIF
I am thinking of building that one out...
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