i have been working on a SD card related project for a while and unfortunately i do not have access to good SD card modules so i decided to build one.
as we all know micro controllers work with 5v(logic 1) and SD cards work with 3.3v(logic 1) so we need a level converter here.
i google and found this on the web:
i simulated this circuit with Orcad Pspice9.2 and i replaced BSS138 with 2N7002 and with a frequency 250KHz
here is the schematics and result:
as you can see there is a peak at rising edge of the output signal
my question is this circuit can be used to interface a SD card to a micro controller or not?