摘要:
A power-up circuit for a semiconductor memory device includes a voltage division unit configured to divide a power supply voltage, a first power-up generation unit configured to detect a voltage level of a first divided voltage of the voltage division unit during an initial stage of applying a power supply to generate a first power-up signal and a second power-up generation unit configured to detect a voltage level of a second divided voltage of the voltage division unit, after the first power-up signal is generated from the first power-up generation unit, to generate a second power-up signal.
摘要:
Herein, a voltage sensing circuit, which is capable of controlling a pumping voltage to be stably generated in a low voltage environment, is provided. The voltage sensing circuit includes a current mirror having first and second terminals, a first switching element configured to control current on the first terminal of the current mirror by a reference voltage, a second switching element configured to control current from the second terminal of the current mirror in response to a pumping voltage, and a third switching element configured to control current sources of the first and second switching elements to receive a negative voltage.
摘要:
A circuit for generating a voltage of a semiconductor memory apparatus includes a control unit that outputs a driving control signal in response to an enable signal and a burn-in signal, a first voltage generating unit that generates and outputs a first voltage in response to the enable signal, and a voltage maintaining unit that maintains the first voltage in response to the driving control signal.
摘要:
A semiconductor memory device is capable of reducing a test time by sharing input pins of addresses for the test, thereby reducing test costs also. The semiconductor memory device includes first and second address buffer units. The first address buffer unit is configured to transmit a plurality of normal addresses to an internal circuit and store one or more of the received normal addresses. The second address buffer unit is configured to transmit one or more external bank addresses to the internal circuit as internal bank addresses in a normal mode and transmit addresses stored in the first address buffer unit to the internal circuit as the internal bank addresses in a test mode.
摘要:
Semiconductor memory device and method of operating the same includes an enable signal generator configured to generate first and second enable signals having activation timings determined in response to activation of an active command, the first enable signal being deactivated after a first time from a deactivation timing of the active command, and the second enable signal being deactivated after a second time longer than the first time from the deactivation timing of the active command. Internal voltage generators are configured to generate internal voltages. At least one of the internal voltage generators is turned on/off in response to the first enable signal, and at least one other of the internal voltage generators is turned on/off in response to the second enable signals.
摘要:
A semiconductor memory device generates an internal voltage by using one detecting circuit at the burn-in and normal modes. The semiconductor memory device includes a burn-in adjusting circuit to produce a burn-in mode test signal, a first reference voltage generating circuit to produce a first reference voltage for a burn-in test in response to the burn-in mode test signal, a second reference voltage generating circuit to produce a second reference voltage for a normal mode, a detecting circuit for detecting voltage levels of the first and second reference voltages and outputting a detection signal and an internal voltage generating circuit for generating an internal voltage in response to the detection signal.
摘要:
A semiconductor device includes: a first reference voltage generator for generating a first reference voltage; a first band gap circuit for dividing a voltage at a second reference voltage output node to produce a first and a second band gap voltages having a property relative to temperature variations; a first comparator for receiving the first reference voltage as a bias input and comparing the first band gap voltage with the second band gap voltage; and a first driver for pull-up driving the second reference voltage output node in response to an output signal of the first comparator.
摘要:
A semiconductor memory apparatus includes an active signal generation unit that generates a plurality of active signals having different enable timings in response to a refresh signal, a precharge signal generation unit that delays at least one of the active signals to generate at least one precharge signal for enabling at least two equalizer signals at the same time, and a sense amplifier driver control unit that generates the plurality of equalizer signals for controlling individual sense amplifier drivers in response to the plurality of active signals and the precharge signal.
摘要:
A semiconductor memory device includes a bit line sense amplifying block that senses and amplifies bit line data. A first driving block drives a pull up power line of the bit line sense amplifying block using a voltage applied to a normal driving voltage terminal. A second driving block drives the normal driving voltage terminal using an over driving voltage. An over driving signal generation block generates an over driving signal that defines an over driving interval in response to an active command. An external power supply voltage level detection block detects a voltage level of the external power supply voltage. A selective output block selectively outputs the over driving signal in response to an output signal of the external power supply voltage level detection block, wherein an output signal of the selective output block controls the second driving block.
摘要:
The present invention relates to a semiconductor memory device for sensing voltages of bit lines in high speed. The semiconductor memory device for sensing voltages of bit lines in high speed includes: a first bit line pair to a fourth bit line pair each coupled to a different unit cell array; a bit line sense amplifying means coupled to the first bit line pair to the fourth bit line pair for amplifying data transmitted through the first bit line pair to the fourth bit line pair; and a switching block for connecting one of the first bit line pair to the fourth bit line pair with the bit line sense amplifying means in response to a control signal.