????? I have attached my version of the schematic diagram . To get to the PCB stage I have to have the correct connections with the controller. Is anyone kind enough to tell me which pins connect LO and RX to HW-267 (STM32F103C8T6 STM32 Development Boards (Blue Pill)?
I want to clarify the following about my schematic :
RLC values are generic.
System ground does not reflect the appropriate situation in the future PCB. It's just the electrical connections. For example, on the SAW ?Epcos ?B3555 filter the ground connections for the housing are top and the signal ground connections must be to the bottom PCB plane?to avoid the "ground-loop"?.
Level Shifter is optional.
I have no connection to the attenuator because I don't know what data pins are connected at STM board.
Any suggestions on removing / adding components or changing the controller are welcome.
Daniel? Ungureanu
YO8SAK
