Ultramemory Inc.

Yuji Motoyama

Hideyuki Yoko

Takao Adachi

Akihiko Takizawa

Masatoshi Hasegawa

Shigeru Nakahara

A semiconductor device according to an embodiment of the present invention which can rapidly output data while being relatively low cost includes: a plurality of memory each including: a strobe signal transmission path having, in this order, a strobe input terminal, a strobe delay circuit, and a strobe output terminal; a plurality of data output circuits connected to a downstream side of the strobe delay circuit of the strobe signal transmission path; and a data output bus connected to the plurality of data output circuits; and a controller including: a strobe circuit which inputs the strobe signal to the strobe input terminal; a data buffer circuit which temporarily stores the data outputted from the data output terminal; and a delay adjustment circuit which adjusts a delay amount of the strobe delay circuit so as to decrease a difference between the memory in delay of the strobe signal outputted from the strobe output terminal relative to the strobe signal outputted from the strobe circuit.

Semiconductor memory devices and controller including adjustable strobe delay

The objective of the invention is to provide technology allowing data taking a plurality of values to be transmitted and received using one set of coils when sending data through TCI technology using magnetic field coupling. This layered semiconductor device has at least a first semiconductor chip and a second semiconductor chip layered therein, the first semiconductor chip transmitting data in a contactless manner, and the second semiconductor chip receiving, in a contactless manner, the data that has been transmitted. The first semiconductor chip contains: a transmission unit outputting a transmission signal that may acquire, on the basis of the value of the data to be sent, at least 3 types of states representing the value of the data; and a transmission coil converting the transmission signal into a magnetic field signal. The second semiconductor chip contains: a reception coil whereby the magnetic field signal converted by the transmission coil is converted into a reception signal; and a reception unit reconstructing, on the basis of the state of the reception signal, the data that has been transmitted.

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Tokyo, Japan

Yuji Motoyama