摘要:
When a state of outputting a third power supply potential to an output node is switched to a state of outputting a second power supply potential, connection between a supply unit of the second power supply potential and the output node is made through a first P-channel MOSFET. Further, when the first P-channel MOSFET is turned off, i.e., when the third power supply potential is output to the output node, the third power supply potential is also applied to a gate of the first P-channel MOSFET. Therefore, even when the potential of the output node rises to the third power supply potential, this transistor is not turned on. Thus, the second power supply potential and the output node are appropriately and electrically isolated from each other. The circuit can be used with a flash memory to prevent over programming.
摘要:
A power terminal is connected to a DC power source. A differential amplifier has primary and secondary input terminals and an output terminal, and a device applies a reference voltage to the secondary input terminal of the differential amplifier. A phase inverter has an input terminal connected to the output terminal of the differential amplifier and has primary and secondary output terminals that output two output signals of opposite phase. A push-pull drive circuit has primary and secondary input terminals connected to the primary and secondary output terminals of the phase inverter, and has primary and secondary output terminals connected to a switching element that alternately turns on and off by being driven by the two output signals of opposite phase that are provided from the output terminals of the phase inverter. An autotransformer has a tap connected to the power terminal and taps, provided at both sides of the tap connected to the power terminal, that are connected to the primary and secondary output terminals at the push-pull drive circuit, respectively. A capacitive load may be connected at both sides of the autotransformer. A positive feedback path connects one terminal of the autotransformer to the primary input terminal of the differential amplifier, and a sinusoidal AC voltage is applied to the capacitive load. A duty ratio conversion circuit automatically changes the duty ratio of drive signals for the push-pull drive circuit according to the resonance frequency that is determined by the inductance of the autotransformer and the capacitance of the capacitive load. The duty ratio conversion circuit is connected between the phase inverter and the push-pull drive circuit.
摘要:
Each match line is connected to a plurality of CAM cells constituting a CAM array. The respective CAM cells store data applied through a bit line and an inverted-bit line in its data storage portion when selected by a word line. The stored data are applied to a data comparison portion to be compared with retrieval data applied through the bit line and the inverted-bit line, thereby detecting match or mismatch therebetween. A comparison result of the data comparison portion is first stored in a capacitance element in the form of charge. In order to prevent escape of the information stored in the capacitance element, a blocking means blocks a part of a charge and discharge path for the capacitance element. A charge transfer means provided between the capacitance element and the match line transfers a certain amount of charge from either one to the other when information of mismatch is stored in the capacitance element. This causes fluctuation of charge potential on the match line. The fluctuation of potential on the match line depends on the number of mismatched CAM cells out of a plurality of CAM cells connected to the match line. Therefore, detection of potential on the match line permits detecting the number of mismatched CAM cells.
摘要:
An arbiter circuit is disclosed for processing competing requests for access to a shared resource made simultaneously by two subsystems in a multi-processor system. The arbiter circuit includes an SR flip-flop composed of a pair of NAND gates, and functions to block the passage of a subsequent request signal from one subsystem to the SR flip-flop during a predetermined time interval after a request signal from the other subsystem has been supplied to the flip-flop. A result is that the both inputs of the SR flip-flop are not shifted up from the low levels to the high levels at the same time by the simultaneous generation of request signals from both subsystems, thereby eliminating any possibility of the output from the flip-flop floating at an intermediate level between the high and low level.
摘要:
Implementations and techniques are generally disclosed for an actuator comprising: a first element, a second element, a third element, a first joint provided between the first element and the second element, a second joint provided between the second element and the third element, and a motor operably coupled to the first joint and configured such that the second element rotates with respect to the first element about a first rotational axis when the motor rotates, wherein the first joint is operably coupled to the second joint and configured such that the third element can rotate with respect to the second element about a second rotational axis when the motor rotates.
摘要:
A hot electron (BBHE) is generated close to a drain by tunneling between bands, and it data writing is performed by injecting the hot electron into a charge storage layer. When Vg is a gate voltage, Vsub is a cell well voltage, Vs is a source voltage and Vd is a drain voltage, a relation of Vg>Vsub>Vs>Vd is satisfied, Vg−Vd is a value of a potential difference required for generating a tunnel current between the bands or higher, and Vsub−Vd is substantially equivalent to a barrier potential of the tunnel insulating film or higher.
摘要:
A nonvolatile semiconductor memory device includes a first PMOS transistor and a second PMOS transistor having a gate, the first and the second PMOS transistors being connected in series; and a first NMOS transistor and a second NMOS transistor having a gate, the first and the second NMOS transistors being connected in series; wherein the gate of the second PMOS transistor and the gate of the second NMOS transistor are commonly connected and floated.
摘要:
The present invention relates to a nonvolatile semiconductor memory, and more specifically relates to a nonvolatile semiconductor memory with increased program throughput. The present invention provides a nonvolatile semiconductor memory device with a plurality of block source lines corresponding to the memory blocks, arranged in parallel to the word lines, a plurality of global source lines arranged in perpendicular to the block source lines; and a plurality of switches for selectively connecting corresponding ones of the block source lines and the global source lines.
摘要:
A nonvolatile semiconductor memory device comprises a first PMOS transistor and a second PMOS transistor having a gate, the first and the second PMOS transistors being connected in series; and a first NMOS transistor and a second NMOS transistor having a gate, the first and the second NMOS transistors being connected in series; wherein the gate of the second PMOS transistor and the gate of the second NMOS transistor are commonly connected and floated.
摘要:
A hot electron (BBHE) is generated close to a drain by tunneling between bands, and bit data writing is performed by injecting the hot electron into a charge storage layer. When Vg is a gate voltage, Vsub is a cell well voltage, Vs is a source voltage and Vd is a drain voltage, a relation of Vg>Vsub>Vs>Vd is satisfied, Vg−Vd is a value of a potential difference required for generating a tunnel current between the bands or higher, and Vsub−Vd is substantially equivalent to a barrier potential of the tunnel insulating film or higher.