摘要:
A semiconductor memory device, e.g., a DRAM, which includes a P-type semiconductor substrate, a memory array each memory cell of which includes at least one N-channel MOS transistor, a CMOS peripheral circuit at least partially surrounding the memory array, the peripheral circuit including at least one P-channel MOS transistor formed in an N-type well region formed in the substrate, and at least one N-channel MOS transistor formed in the substrate outside of the N-type well region, and, a P-type minority carrier absorption semiconductor region formed in the substrate between the N-type well region and the memory array. The minority carrier absorption semiconductor region is preferably connected to a source of negative voltage, e.g., the substrate bias voltage, and a separate N-type region formed in the N-type well region is preferably connected to a source of positive voltage, e.g., the power supply voltage, Vdd, of the memory device. The N-type well region functions to absorb or capture hot electrons generated by the N-channel MOS transistor of the CMOS peripheral circuit, and the P-type minority carrier absorption semiconductor region functions to absorb or capture holes which would otherwise combine with the hot electrons to induce substrate current which could deleteriously lower the threshold voltage level of the memory cells of the memory array and thereby degrade the data storage integrity thereof.
摘要:
A dynamic random access memory (DRAM) device, including a DRAM core having memory cells for storing data information, and a read protection unit, prevents data stored in the memory cells before power-off, from being read out at power-on.
摘要:
A solution for allowing conditional access to IP-based broadcast services in a passive optical network is disclosed. When a subscriber requests broadcast services by selecting a broadcast channel, an IP set-top converts the request into an IGMP join message and forwards the message to an ONU/ONT, a unit on the subscriber's side. The ONU/ONT delivers the message to an OLT interworking with a router while storing mapping information of the port that received the message and a MAC address of the selected channel. Thereafter, the OLT extracts information on MAC address of the IP set-top box and the requested broadcast data. The OLT compares the extracted information to the subscriber's subscription information and determines whether to provide the requested broadcast services. If the broadcast services may be provided, the broadcast data provided from the broadcast server is transmitted to the IP set-top box via ONU/ONT based on the stored mapping information.
摘要:
An authentication apparatus for a non-real-time IPTV system decrypts a first encrypted value included in a contents request message received from a device using a preset session key, and then verifies the validity of the contents request message. If the verification results of the contents request message are valid, the authentication apparatus encrypts a variation between timestamps of the authentication apparatus and the device using the session key, and then generates a second encrypted value. After verification information by which the device is capable of verifying the authentication apparatus has been generated using the second encrypted value, the authentication apparatus sends verification information, together with contents corresponding to the contents request message, to the device.
摘要:
A temperature sensor instruction signal generator, which may drive a temperature sensor, and a semiconductor memory device including the same. The temperature sensor instruction signal generator may generate an instruction signal that instruct the operation of the temperature sensor using at least one of a master clock (CLK) signal, a clock enable (CKE) signal, a row address selection (RAS) signal, a column address selection (CAS) signal, a write enable (WE) signal, and a chip selection (CS) signal, wherein the instruction signal may be enabled corresponding to at least one of a self refresh mode, an auto refresh mode, and a long tRAS mode. The semiconductor memory device may include a temperature sensor and the temperature sensor instruction signal generator.
摘要:
A dynamic random access memory (DRAM) device, including a DRAM core having memory cells for storing data information, and a read protection unit, prevents data stored in the memory cells before power-off, from being read out at power-on.
摘要:
A memory device according to the present invention includes multiple refresh modes and a refresh controller. A first refresh mode can respectively select one more memory block among a plurality of banks comprising a plurality of blocks and each of all banks. In addition, the first refresh mode may perform a refresh operation with respect to selected memory blocks. The second refresh mode can select a part of the banks and perform a refresh operation of data with a selected bank. The controller may select one of the first and second refresh modes in a refresh operation.
摘要:
A temperature sensor instruction signal generator, which may drive a temperature sensor, and a semiconductor memory device including the same. The temperature sensor instruction signal generator may generate an instruction signal that instruct the operation of the temperature sensor using at least one of a master clock (CLK) signal, a clock enable (CKE) signal, a row address selection (RAS) signal, a column address selection (CAS) signal, a write enable (WE) signal, and a chip selection (CS) signal, wherein the instruction signal may be enabled corresponding to at least one of a self refresh mode, an auto refresh mode, and a long tRAS mode. The semiconductor memory device may include a temperature sensor and the temperature sensor instruction signal generator.
摘要:
A semiconductor memory device and a failed cell address programming circuit usable therein. The semiconductor memory device as packaged includes a memory cell array having a plurality of memory cells accessed by an internal address, a plurality of redundant memory cells accessed by a failed cell address of a failed memory cell for repairing a failed memory cell, a comparator for comparing data output from the memory cells during testing the semiconductor memory device as packaged and generating a comparative correspondence signal, a mode setting register for storing an externally applied failed cell address programming control signal in response to a mode control signal, an address generating circuit for generating the internal address by buffering and latching an externally applied address, a failed cell address programming circuit for latching the internal address output from the address generating circuit in response to the failed cell address programming control signal when the comparative accordance signal indicates that a failed memory cell is detected and programming the failed cell address which is an address for accessing the failed memory cell; and a failed cell address decoding circuit for generating a redundant selection signal when the internal address output from the address generating circuit and the failed cell address output from the failed cell address programming correspond.
摘要:
A dynamic random access memory device includes a circuit for generating sense amplification activation signals applied to sense amplifier circuits. The circuit changes the slopes of the activation signals according to variation of a power supply voltage. According to the present invention, the peak current the sense amplifier circuits use when the power supply voltage increases, is reduced, so that the sense amplifier circuits create less noise in the memory device.