46 results about "Cutoff function" patented technology

Each memory block has a plurality of memory cells, and word lines and bit lines connected to the memory cells. Precharge switches connect the bit lines to a precharge line. A switch control circuit controls an operation of the precharge switches and sets a cutoff function that turns off connection switches in a standby period in which no access operation of the memory cells is performed. Since connections of the bit lines and the precharge switch and those of the bit lines and the sense amplifier are cut off in the standby period, if a short circuit failure is present between a word line and a bit line, a leak current can be prevented from flowing from the word line to a precharge voltage line and so on.

Each memory block has a plurality of memory cells, and word lines and bit lines connected to the memory cells. Precharge switches connect the bit lines to a precharge line. A switch control circuit controls an operation of the precharge switches and sets a cutoff function that turns off connection switches in a standby period in which no access operation of the memory cells is performed. Since connections of the bit lines and the precharge switch and those of the bit lines and the sense amplifier are cut off in the standby period, if a short circuit failure is present between a word line and a bit line, a leak current can be prevented from flowing from the word line to a precharge voltage line and so on.

Disclosed is a power source device having a standby power-cutoff function, which is to be used to charge a battery. The power source device comprises: a micro-USB connector (24) for connecting to the power source unit (20) of a smartphone when the battery of the smartphone or the like is to be charged; and a power generation unit (32) supplying DC charging power to the smartphone (20) from an AC input power source. The present invention includes: a control unit (33) having at least one microprocessor for controlling the overall operation and functioning of a power source device (30); a power supply / cutoff unit (34) supplying / cutoff the AC input power to the power generation unit (32) according to the control of the control unit (33); and a current-sensing unit (CT) connected so as to monitor the current from the power supply / cutoff unit (34), provide the control unit (33) with the current, and provide an indication of the charging state of the battery. The power source unit (20) of the smartphone also includes a first backflow-preventing unit (22) connected between the battery (21) and the control unit (33) so as to prevent the DC power from the power source device (30) from being directly applied to the battery (21) during charging, and the power source device (30) further includes a second backflow-preventing unit (31) which is connected between the DC charging voltage output terminal of the power generation unit (32) and the power supply voltage (Vc) of the control unit (33).

The invention discloses a vortex ring exciter based on negative pressure cutoff. The vortex ring exciter comprises an air supply device, a negative pressure cutoff device, a shrinkage reducing deviceand a ventilation pipeline; a main body of the ventilation pipeline is cylindrical; the air supply device and the shrinkage reducing device are arranged at the two ends of the ventilation pipeline; one side of the pipe wall of the ventilation pipeline is provided with an opening or the two sides are symmetrically provided with openings; the negative pressure cutoff device is arranged at the opening of the ventilation pipeline; and the negative pressure cutoff device generates negative pressure at the opening of the ventilation pipeline to cut off airflow in the ventilation pipeline, and the cutoff airflow is curled under the action of the shrinkage reducing device to generate a vortex ring. According to the vortex ring exciter based on negative pressure cutoff, the cutoff function is achieved by replacing mechanical parts with negative pressure, gas at the moment of cutoff is guided out through the negative pressure while cutoff is conducted, redundant blocked gas cannot be generated,and fluid energy loss is reduced.