Abstract:
The sense amplifier control circuit comprising a sense amplifier and a first sense amplifier driver, characterized in that a driver control circuit to keep current constant in the first sense amplifier driver, a bias circuit to keep current constant in the driving device and a means to drive the driver control circuit and the bias circuit are provided with the sense amplifier control circuit to reduce power noise.
Abstract:
The back bias generator includes normally a generator consisting of a driving part which drives a pump by input launch signal of an oscillator and a pum, an active generator consisting of an oscillator, a drive and a pump, detector which detects negative level of back bias voltage, a delay which delays output from the detector, a control and a power up circuit, to fasten level set up time of back bias voltage.
Abstract:
The circuit protects sense amplifiers from being applied with an excess voltage by comparing inputs with a reference voltage. The circuit comprises: a level change unit (30) to change a P-S/A driving signal which is generated by the row address access; a comparator (40) to compare a sensing enable line voltage (SAP) with a reference voltage (VREF), which is connected with the level change unit (30) and P-MOS transistor sensing unit (20); a trigger (50) for reverse triggering of the comparator output; and the trigger output voltage is linearly inverted by the bias unit (60).
Abstract:
A refresh address generator includes a refresh address counting unit, a refresh address table, and an address selecting unit. The refresh address counting unit generates a counting signal by performing a counting operation in response to a refresh request signal, outputs at least one bit of the counting signal as an address selection signal, and outputs the remaining bits of the counting signal as a first refresh address. The refresh address table stores a row address of a memory cell having a data retention time shorter than a predetermined time, and outputs, as a second refresh address, the row address stored in a line corresponding to at least some bits of the first refresh address. The address selecting unit selectively outputs the first refresh address provided from the refresh address counting unit or the second refresh address provided from the refresh address table in response to the address selection signal.