Abstract:
A level shifter includes a level shifting unit for level-shifting an input signal at a first voltage level into a signal at a second voltage level, and an output controller for controlling the level shifting unit to maintain output at a predetermined logic level in response to a deep power down mode signal generated from power which is not turned off in a deep power down mode.
Abstract:
Disclosed herein is a differential amplifier control circuit in which a signal indicating that all banks are not activated is provided to a differential amplifier, so that the differential amplifier does not operate, thereby reducing unnecessary current consumption in an ICC2N situation. An all bank idle notification unit generates an all bank idle signal notifying that a plurality of banks are not activated using a plurality of bank active signals for activating the plurality of the banks. A differential amplifier controller generates a differential amplifier control signal for disabling a differential amplifier using an all bank idle signal and an internal clock signal. The differential amplifier does not operate in response to the differential amplifier control signal if the plurality of the banks is all inactivated.
Abstract:
A data alignment circuit includes: a select transmission unit configured to selectively transmit a first pulse or ground voltage as a first control pulse and selectively transmit a second pulse or ground voltage as a second control pulse, in response to a control signal; and a data latch unit configured to latch data in response to the first and second pulses and the first and second control pulses, and generate first to fourth data.
Abstract:
A write driving device includes a buffer unit, a duration signal generation unit, and a data input clock pulse generation unit. The buffer unit is configured to generate an alignment signal in response to a transition timing of a data strobe signal. The duration signal generation unit is configured to generate a duration signal which is enabled during a predetermined duration in response to a write command. The data input clock pulse generation unit is configured to generate a data input clock pulse for transferring data to a global line in response to the alignment signal within an enable duration of the duration signal.
Abstract:
Disclosed is a data output controller that includes an enable signal controller, which generates a control signal having a predetermined pulse width in response to a DQ off signal and a write signal and generates a clock enable signal in response to a read signal and the control signal in synchronization with the control signal when the read signal is activated, and a clock generator that receives the enable signal and an internal clock signal and generates a data clock signal in synchronization with the internal clock signal during an activation period of the enable signal.
Abstract:
A semiconductor memory device having a clock signal generating circuit which is capable of controlling a data output in compliance with PVT fluctuation by controlling a output timing of rising and falling clock signal based on a fuse cutting is described. The clock signal generating circuit includes a fuse unit for generating first and second fuse signals based on fuse cutting of fuses, a control signal generating unit for generating first and second fuse signals in response to the fuse signals, a clock signal delaying unit for generating a delayed clock signal by delaying the external clock signal by a delay section specified by the control signals, and a clock generating unit for generating a first internal clock signal in synchronization with a rising edge of the delayed clock signal and for generating a second internal clock signal in synchronization with a falling edge of the delayed clock signal.
Abstract:
A repeater of a global input/output line includes a data transmitter including first and second drivers for outputting data signals of the global input/output line through different transmission routes in response to a transmission direction control signal, and a third driver for driving the global input/output line in response to an output signal of the data transmitter.
Abstract:
Disclosed is a data output controller that includes an enable signal controller, which generates a control signal having a predetermined pulse width in response to a DQ off signal and a write signal and generates a clock enable signal in response to a read signal and the control signal in synchronization with the control signal when the read signal is activated, and a clock generator that receives the enable signal and an internal clock signal and generates a data clock signal in synchronization with the internal clock signal during an activation period of the enable signal.
Abstract:
A data output circuit includes a control signal generation block configured to generate a first transfer control signal which is produced in a first read operation and a second transfer control signal which is produced in a second read operation, where the first transfer control signal and the second transfer control signal are generated upon entry into a test mode; and an enable signal generation unit configured to generate first and second enable signals for generating first and second internal clocks, in response to the first and second transfer control signals.
Abstract:
A data input circuit includes a clock sampling unit, a final clock generation unit, and a write latch signal generation unit. The sampling unit is configured to generate a shifting signal including a pulse generated after a write latency is elapsed, and generate a sampling clock by sampling an internal clock during a burst period from substantially a time when the pulse of the shifting signal is generated. The final clock generation unit is configured to generate a level signal by latching the shifting signal in synchronization with the sampling clock and generate a final clock from the level signal in response to a burst signal. The write latch signal generation unit is configured to generate an enable signal by latching the final clock and generate a write latch signal for latching and outputting aligned data in response to the enable signal.