A memory card circuit for a portable memory card includes a unidirectional non-inverting buffer with an analog switch connected to an input terminal of a semiconductor memory and a bidirectional 3-state buffer with an analog switch connected to an input/output terminal of the memory card. An analog switch...http://www.google.fr/patents/US5016223?utm_source=gb-gplus-shareBrevet US5016223 - Memory card circuit
