This source is 125KHz RFID reader for EM4095 as ATMEGA8-16AU. Leeky is really my id AVRfreaks.net and this source is mine,

em4095 rfid circuit 125KHz-134 KHz, Read write analog front end for RFID basestation-em4095 rfid circuit 125KHz-134 KHz, Read write analog front end for RFID basestation