摘要:
A semiconductor memory unit includes first to Nth variable resistance elements each having different resistance values according to values stored therein, wherein N is a natural number equal to or greater than 2; a reference resistance element having a first reference resistance value; and first to Nth comparison units which correspond to the first to Nth variable resistance elements, respectively, and each of which determines whether a resistance value of the corresponding variable resistance element is greater or less than a second reference resistance value, wherein the first to Nth comparison units are commonly coupled to the reference resistance element.
摘要:
According to one embodiment, a memory device includes a memory cell, a sense amplifier, and a resistor. The sense amplifier includes a first input and a second input, outputs a signal in accordance with a difference between the first and second inputs, and is selectively coupled at a second input to the memory cell. The resistor is in a first path between the first input of the sense amplifier and a ground node.
摘要:
According to one embodiment, a memory device includes a memory cell, a sense amplifier, and a resistor. The sense amplifier includes a first input and a second input, outputs a signal in accordance with a difference between the first and second inputs, and is selectively coupled at a second input to the memory cell. The resistor is in a first path between the first input of the sense amplifier and a ground node.
摘要:
An impedance control circuit includes a first impedance unit configured to terminate an impedance node using an impedance value that is determined by an impedance control code, a second impedance unit configured to terminate the impedance node using an impedance value that is determined by an impedance control voltage, a comparison circuit configured to compare a voltage level of the impedance node and a voltage level of a reference voltage, generate an up/down signal indicating whether the voltage at the impedance node is greater than the reference voltage, and generate the impedance control voltage that has a voltage level corresponding to a difference between the voltage at the impedance node and the reference voltage, and a counter unit configured to increase or decrease a value of the impedance control code in response to the up/down signal.
摘要:
The domain crossing circuit of a semiconductor memory apparatus for improving a timing margin includes a sampler that provides a sampling internal signal generated by delaying an internal input signal by a predetermined time in response to a clock and an edge information signal that defines an output timing of the sampling internal signal and an output stage that allows the sampling internal signal to be synchronized with the clock in response to the edge information signal to be output as a final output signal.
摘要:
A semiconductor apparatus includes a clock input buffer, an asynchronous data input buffer, and a synchronous data input buffer. The clock input buffer is configured to buffer an external clocks in order to generate an internal clock. The asynchronous data input buffer is configured to buffer data input through a data pad and output the buffered data. The synchronous data input buffer is configured to be synchronous with the internal clock to buffer the buffered data. The semiconductor apparatus is arranged so that the length of a line for transferring the internal clock to the synchronous data input buffer and the length of a line for transferring the buffered data to the synchronous data input buffer are substantially equal to each other.
摘要:
A domain crossing circuit of a semiconductor memory apparatus, the domain crossing circuit comprising first and second count signals generated at substantially a same clock period, and representing predetermined clock differences with reference to an internal clock signal with respect to same bit combination data, and a data processing unit configured to provide output data corresponding to input data based on the second count signal in response to the input data synchronized to an external clock signal.
摘要:
A Delay Locked Loop (DLL) includes a replica delay unit configured to delay an output clock to generate a feedback clock; a phase detector configured to measure a phase difference between the feedback clock and an input clock; a quantization unit configured to quantize the phase difference measured by the phase detector; and a delay unit configured to delay the input clock based on a quantization result from the quantization unit to generate the output clock.
摘要:
A voltage adjustment circuit of a semiconductor memory apparatus includes a control voltage generating unit configured to distribute an external voltage for selectively outputting a plurality of distribution voltages as a control voltage in response to a control signal, the plurality of the distribution voltages each have different voltage levels, a comparing unit configured to include a voltage supply unit configured to control an external voltage supplied to a first node and a second node if a level of an output voltage is higher than a level of a reference voltage in response to a level of the control voltage, and a detection signal generating unit configured to drop potential levels of the first and second nodes according to the levels of the output voltage and the reference voltage, and to output the potential level of the second node as a detection signal, and a voltage generating unit configured to drive the external voltage according to a potential level of the detection signal and to output the external voltage as the output voltage.
摘要:
A semiconductor memory device includes a delay locked loop circuit that can control input/output timing of data according to a system clock of a high frequency. The semiconductor memory device includes a phase comparator configured to detect a phase difference between an internal clock and a reference clock to output a state signal having a pulse width corresponding to the detected phase difference, a phase adjuster configured to generate a digital code for determining a delay time corresponding to the state signal for locking a phase of the internal clock, a digital-to-analog converter configured to convert the digital code to an analog voltage, and a multiphase delay signal generator configured to delay the internal clock according to a bias voltage corresponding to the analog voltage to feed back the delayed internal clock as the internal clock and generate multiphase delay signals.