Abstract: A semiconductor memory device has a plastic package including an inductor, a first memory chip including a booster circuit that boosts a voltage from a first voltage to a second voltage using the inductor, and a second memory chip having a terminal supplied with the second voltage from the first memory chip.

Abstract: According to one embodiment, a memory system includes a nonvolatile semiconductor storage device and a memory controller. The nonvolatile semiconductor storage device includes at least one memory device including a plurality of memory cells corresponding to a plurality of pages. The memory controller is configured to control the nonvolatile semiconductor storage device. The pages include a first page. The memory controller is configured to: read first data stored in the first page from the nonvolatile semiconductor storage device; correct a fail bit included in the read first data; generate first spare data including information on the fail bit corrected in the read first data; and store the first spare data in the nonvolatile semiconductor storage device.

Abstract: A memory chip unit includes a pad electrode including first and second portions, and a memory cell array. A prober includes a probe card and a movement mechanism. The probe card includes a probe electrode to be in contact with the pad electrode, and a memory controller electrically coupled to the probe electrode and executes reading and writing on the memory cell array. The movement mechanism executes a first operation that brings the probe electrode into contact with the first portion and does not bring the probe electrode into contact with the second portion, and a second operation that does not bring the probe electrode into contact with the first portion and brings the probe electrode into contact with the second portion.

Abstract: A just intonation electronic keyboard instrument comprises a plurality of tonality selection switches for selecting each key from among twenty-four just intonation keys, a control circuit for determining one or a plurality of just intonation keys according to the manipulation of said switches, a variable frequency oscillator having its output oscillation frequency varied in accordance with the selected key, and a frequency dividing circuit having frequency dividers which are varied of their frequency dividing ratios according to the selected key. The number of tonality selection switches is less than twenty-four. The control circuit discriminates the selection to a major scale or a minor scale, and discriminates one or a plurality of keys from each of twelve keys from C through B, and determines one or a plurality of selected just intonation keys, according to the manipulation of said intonation selection switches.