摘要:
One object of the present invention is to provide a regulator circuit with an improved noise margin. In a regulator circuit including a bias circuit generating a reference voltage on the basis of the potential difference between a first power supply terminal and a second power supply terminal, and a voltage regulator outputting a potential to an output terminal on the basis of a reference potential input from the bias circuit, a bypass capacitor is provided between a power supply terminal and a node to which a gate of a transistor included in the bias circuit is connected.
摘要:
One object of the present invention is to provide a regulator circuit with an improved noise margin. In a regulator circuit including a bias circuit generating a reference voltage on the basis of the potential difference between a first power supply terminal and a second power supply terminal, and a voltage regulator outputting a potential to an output terminal on the basis of a reference potential input from the bias circuit, a bypass capacitor is provided between a power supply terminal and a node to which a gate of a transistor included in the bias circuit is connected.
摘要:
One object of the present invention is to provide a regulator circuit with an improved noise margin. In a regulator circuit including a bias circuit generating a reference voltage on the basis of the potential difference between a first power supply terminal and a second power supply terminal, and a voltage regulator outputting a potential to an output terminal on the basis of a reference potential input from the bias circuit, a bypass capacitor is provided between a power supply terminal and a node to which a gate of a transistor included in the bias circuit is connected.
摘要:
One object of the present invention is to provide a regulator circuit with an improved noise margin. In a regulator circuit including a bias circuit generating a reference voltage on the basis of the potential difference between a first power supply terminal and a second power supply terminal, and a voltage regulator outputting a potential to an output terminal on the basis of a reference potential input from the bias circuit, a bypass capacitor is provided between a power supply terminal and a node to which a gate of a transistor included in the bias circuit is connected.
摘要:
The semiconductor device includes a memory cell including a first transistor including a first channel formation region, a first gate electrode, and first source and drain regions; a second transistor including a second channel formation region provided so as to overlap with at least part of either of the first source region or the first drain region, a second source electrode, a second drain electrode electrically connected to the first gate electrode, and a second gate electrode; and an insulating layer provided between the first transistor and the second transistor. In a period during which the second transistor needs in an off state, at least when a positive potential is supplied to the first source region or the first drain region, a negative potential is supplied to the second gate electrode.
摘要:
It is an object to provide a semiconductor device with a novel structure in which stored data can be held even when power is not supplied, and does not have a limitation on the number of writing operations. A semiconductor device includes a plurality of memory cells each including a transistor including a first semiconductor material, a transistor including a second semiconductor material that is different from the first semiconductor material, and a capacitor, and a potential switching circuit having a function of supplying a power supply potential to a source line in a writing period. Thus, power consumption of the semiconductor device can be sufficiently suppressed.
摘要:
An object is to provide a semiconductor device with a novel structure, which can hold stored data even when not powered and which has an unlimited number of write cycles. A semiconductor device is formed using a material capable of sufficiently reducing the off-state current of a transistor, such as an oxide semiconductor material that is a widegap semiconductor. The use of a semiconductor material capable of sufficiently reducing the off-state current of a transistor allows data to be held for a long time. In addition, the timing of potential change in a signal line is delayed relative to the timing of potential change in a write word line. This makes it possible to prevent a data writing error.
摘要:
A semiconductor device with a novel structure and a driving method thereof are provided. A semiconductor device includes a non-volatile memory cell including a writing transistor including an oxide semiconductor, a reading p-channel transistor including a semiconductor material different from that of the writing transistor, and a capacitor. Data is written to the memory cell by turning on the writing transistor so that a potential is supplied to a node where a source electrode of the writing transistor, one electrode of the capacitor, and a gate electrode of the reading transistor are electrically connected, and then turning off the writing transistor so that a predetermined amount of electric charge is held in the node. In a holding period, the memory cell is brought into a selected state and a source electrode and a drain electrode of the reading transistor are set to the same potential, whereby the electric charge stored in the node is held.
摘要:
An object is to provide a semiconductor device with a novel structure, which can hold stored data even when power is not supplied and which has an unlimited number of write cycles. The semiconductor device is formed using a memory cell including a wide band gap semiconductor such as an oxide semiconductor. The semiconductor device includes a potential change circuit having a function of outputting a potential lower than a reference potential for reading data from the memory cell. When the wide band gap semiconductor which allows a sufficient reduction in of state current of a transistor included in the memory cell is used, a semiconductor device which can hold data for a long period can be provided.
摘要:
A plurality of memory cells included in a memory cell array are divided into a plurality of blocks every plural rows. A common bit line is electrically connected to the divided bit lines through selection transistors in the blocks. One of the memory cells includes a first transistor, a second transistor, and a capacitor. The first transistor includes a first channel formation region. The second transistor includes a second channel formation region. The first channel formation region includes a semiconductor material different from the semiconductor material of the second channel formation region.