公开(公告)号：DE69325277D1

公开(公告)日：1999-07-15

申请号：DE69325277

申请日：1993-12-31

Applicant: ST MICROELECTRONICS SRL

Inventor： PADOAN SILVIA ,  OLIVO MARCO ,  GOLLA CARLA

IPC: G11C17/00 ,  G11C5/14 ,  G11C16/06 ,  G11C16/30

Abstract: A circuit for detecting a threshold voltage in storage devices integrated to a semiconductor, for which a power supply above a certain value is provided, is of the type which comprises a comparator (3) connected between a voltage supply line (2) and a signal ground (GND) and having a first or reference input (I1) and a second or signal input (I2), and comprises a generator (8) of a stable voltage reference (RIF) having an output connected to the first input (I1) and a divider (9) of a supply voltage (Vdd) connected to the second input (I2) of the comparator (3). A circuit means is arranged to feed the voltage line (2) with the higher of the supply voltage (Vdd) value and the value of a programming voltage (Vpp) of the storage device.

公开(公告)号：DE69222249T2

公开(公告)日：1998-04-02

申请号：DE69222249

申请日：1992-07-28

Applicant: ST MICROELECTRONICS SRL

Inventor： PASCUCCI LUIGI ,  OLIVO MARCO

IPC: G11C11/417 ,  G11C7/10 ,  G11C7/14 ,  G11C7/22 ,  G11C11/401 ,  G11C11/407 ,  G11C11/409 ,  G11C11/413 ,  G11C7/00 ,  G11C5/06

Abstract: Spurious memory readings which may be caused by noise induced by transitions in the output buffers of a fast parallel memory device are prevented by permitting output latches to change state in function of newly extracted data signals by means of an enabling pulse having a preestablished duration and which is generated only after a change of memory address signals has occurred and the new configuration of memory address signals has lasted for a time which is not shorter than the time of propagation of signals through the memory chain. The enabling pulse is generated by employing a detector of transitions occurring in the input circuitry of the memory, a dummy memory chain, a one-shot pulse generator and a resetting pulse generator. The anti-noise network may be exploited also for implementing an auto-stand-by condition at the end of each read cycle, which reduces power consumption and increases speed by implifying the sensing process.