摘要:
A semiconductor memory device includes a memory cell array, an address control unit and a logic circuit. The memory cell array includes a plurality of banks which are divided into a first bank block and a second bank block. The address control unit accesses the memory cell array. The logic circuit controls the address control unit based on a command and an address signal such that the first and second bank blocks commonly operate in a first operation mode, and the first and second bank blocks individually operate in a second operation mode.
摘要:
An on-die termination circuit includes a termination resistor unit connected to an external pin, and a termination control unit connected to the termination resistor unit. The termination resistor unit provides termination impedance to a transmission line connected to the external pin. The termination control unit varies the termination impedance in response to a plurality of bits of strength code associated with a data rate.
摘要:
Example embodiments relate to a receiving apparatus and method thereof. In an example, the receiving apparatus may include a clock generating unit generating a plurality of internal clock signals based on a received external clock signal and an equalization receiving unit receiving the plurality of internal clock signals and an input signal. The equalization receiving unit may determine an offset value and an equalization coefficient in an initial setting mode and may adjust the received data signal based on the determined offset value and equalization coefficient.
摘要:
The PLL includes a selection signal generator configured to output a selection signal varying in response to a first clock signal, and a first dividing circuit configured to divide an externally input reference clock signal by a division ratio and output a first division signal. The first dividing circuit selects one of a plurality of edges of the reference clock signal applied for at least one cycle of the first division signal in response to the selection signal, and synchronizes and generates the first division signal on the basis of the selected edge of the reference clock signal. A second dividing circuit is configured to receive an output clock signal, divide the output clock signal by a division ratio, and output a second division signal. The second dividing circuit selects one of the edges of the reference clock signal applied for at least one cycle of the second division signal in response to the selection signal, and synchronizes and generates the second division signal on the basis of the selected edge of the reference clock signal. A synchronous signal output portion is configured to detect a phase difference between the first and second division signals, generate a control voltage corresponding to the phase difference, and output the output clock signal having a frequency corresponding to the control voltage.
摘要:
A semiconductor memory device includes a memory cell array, a controller, and a data input/output (I/O) unit. The memory cell array includes a plurality of memory cells and is configured to store data. The controller is configured to enable a write clock signal in response to an active command when a write latency of the semiconductor device is less than a reference write latency and disable the write clock signal during a disabling period in which read data is output from the semiconductor device. The data I/O unit is configured to receive data in response to the write clock signal and output the data to the memory cell array.
摘要:
A semiconductor memory device includes a latency controller which provides a power-saving effect. The latency controller includes a first-in first-out (FIFO) register. After a read command is applied, when a precharge command or power-down command is applied, the latency controller outputs a latency signal corresponding to the applied read command and blocks application of sampling and transmission clock signals to the FIFO register.
摘要:
An output driver for enhancing initial output data using timing includes a selection signal generation unit for generating a selection signal, a reference data generation unit for generating reference data, and a selection unit. The selection signal is activated at the transition point of the input data, generated after being maintained in a same logic state during a number of bit periods that is equal to or greater than a predetermined duration number. The reference data is delayed from the input data by a delay time shorter than one bit period. The selection unit is driven to transition the logic state of the output data depending on the transition of the logic state of any one of the input data and the reference data in response to the selection signal.
摘要:
In a decision feedback equalization (DFE) input buffer, timing and voltage errors, such as those caused by inter-symbol interference (ISI), are fully compensated. A variable equalizing coefficient is applied that accommodates, and compensates for, a range of timing errors TE or voltage errors VE that may be generated over a range of operating conditions. In this manner, accurate compensation is achieved, allowing for greater signal reliability and higher inter-circuit transfer rates. A decision feedback equalization (DFE) input buffer includes an equalizer that amplifies a difference in voltage level between an input signal and an oversampled signal in response to a variable equalizing control signal, the equalizer generating an amplified output signal. A sampling unit samples the amplified output signal in response to a sampling clock signal to generate the oversampled signal. A phase detector generates a timing control signal for controlling the timing of the activation of the sampling clock signal in response to a phase of the oversampled signal. An equalizing controller modifies the variable equalizing control signal in response to the timing control signal.
摘要:
In a decision feedback equalization (DFE) input buffer, timing and voltage errors, such as those caused by inter-symbol interference (ISI), are fully compensated. A variable equalizing coefficient is applied that accommodates, and compensates for, a range of timing errors TE or voltage errors VE that may be generated over a range of operating conditions. In this manner, accurate compensation is achieved, allowing for greater signal reliability and higher inter-circuit transfer rates. A decision feedback equalization (DFE) input buffer includes an equalizer that amplifies a difference in voltage level between an input signal and an oversampled signal in response to a variable equalizing control signal, the equalizer generating an amplified output signal. A sampling unit samples the amplified output signal in response to a sampling clock signal to generate the oversampled signal. A phase detector generates a timing control signal for controlling the timing of the activation of the sampling clock signal in response to a phase of the oversampled signal. An equalizing controller modifies the variable equalizing control signal in response to the timing control signal.
摘要:
A charge pump circuit may include a cross-coupled load unit and a bias determination unit. The cross-coupled load unit may receive first and second input signals applied with mutually opposite phases to obtain a charge pumping. The cross-coupled load unit may have first and second output terminals that may be connected with transistors in a cascade connection structure. The bias determination unit may have a current mirror structure, and independently determine biases of a transistor among the cascade structure connected transistors in response to voltages of the first and second output terminals.