Tool/software:
I am wanting to design a 144 MHz FM Receiver with sensitivity down to between -130 to -120 dBm. The audio output will be fed into a UHF Transmitter for a cross band repeater.
I started looking at old HT (Walkie-talkie) schematics and they all seem to use chips that are no longer manufactured.
Many of the chips I have found are for the Broadcast FM band, or for digital communications. I really do not want a processor in it.
I want a superheterodyne front end for sensitivity to weak signals.
Does TI offer something for me to build around? (It would not let me post to the forum without a part number so I picked one.)
How is the best way to get started? Is there a reference design? (I could not find anything.)
The VHF receiver and 2-10 W Transmitter has to fit on a 95 mm x 95 mm PCB. (I do not think that will be a problem.)
Kip