Abstract:
A method of operating a volatile memory device includes storing address information of weak cell rows. According to some examples, after writing to a weak cell row, a refresh operation is performed on the weak cell row within a predetermined time. According to some examples, the writing operation to a weak cell row may be performed with a longer write recovery time than a write recovery time to normal cell rows.
Abstract:
A semiconductor memory device is provided which is capable of adaptively controlling bias and a method of operating the same. The semiconductor memory device includes: a memory cell area including a plurality of first transistors to which a first bias voltage is applied; and a peripheral circuit area which overlaps the memory cell area in a first direction and includes a plurality of second transistors to which a second bias voltage controlled differently from the first bias voltage is applied.
Abstract:
An electronic device is provided. The electronic device includes a receiving circuit configured to wirelessly receive power and output AC power, a rectifying circuit configured to rectify the AC power from the receiving circuit, wherein the rectifying circuit may include a first P-MOSFET configured to transfer a positive amplitude of power to an output terminal of the rectifying circuit while the AC power has the positive amplitude and to prevent transferring a negative amplitude of power to the output terminal of the rectifying circuit while the AC power has the negative amplitude, and a forward loss compensating circuit connected with the first P-MOSFET configured to reduce a threshold voltage of the first P-MOSFET while the AC power has the positive amplitude.
Abstract:
A refresh address generator may include a lookup table including a first portion storing a first group of addresses associated with a first data retention time, and a second portion storing a second group of addresses associated with a second data retention time different from the first data retention time, wherein the addresses of the first portion are more frequently accessed than the addresses of the second portion to refresh the memory cells corresponding to the addresses. Systems and methods may also implement such refresh address generation.
Abstract:
A semiconductor memory device includes: a memory cell array located in a first layer and including a word line, a cell bit line, and a memory cell located in a region where the word line and the cell bit line are crossed; and a bit line sense amplifier located in a second layer, different from the first layer. The bit line sense amplifier is connected to a bit line that is connected to the cell bit line and to a complementary bit line corresponding to the bit line. The bit line sense amplifier detects data stored in the at least one memory cell. Each of the at least one cell bit line is segmented into two or more portions, and the two or more portions are respectively connected to the bit line and the complementary bit line connected to the bit line sense amplifier.