摘要:
A notebook computer battery pack device charges an external electrical device and powers a notebook computer. The notebook computer battery pack device includes battery cells for converting chemical energy into direct current power, a first interface connector for transferring the direct current power to a notebook computer, a second interface connector for transferring the direct current power to the external electrical device, battery management circuitry for providing circuit protection, and charging circuitry for charging the external electrical device through the second interface connector.
摘要:
A high density read-only memory (ROM) cell is installed on a silicon substrate for storing data. The ROM cell includes a first doped region being of a second conductive type installed on the silicon substrate, a plurality of first heavily doped regions being of a first conductive type installed in the first doped region, a second doped region being of the second conductive type installed on the silicon substrate, and a gate installed on the surface of the silicon substrate and adjacent to the first doped region and the second doped region.
摘要:
A high density read-only memory (ROM) cell is installed on a silicon substrate for storing data. The ROM cell includes a first doped region being of a second conductive type installed on the silicon substrate, a plurality of first heavily doped regions being of a first conductive type installed in the first doped region, a second doped region being of the second conductive type installed on the silicon substrate, and a gate installed on the surface of the silicon substrate and adjacent to the first doped region and the second doped region.
摘要:
A voltage supply control apparatus, suitable for being applied to a low voltage operation device. The voltage supply control apparatus has a high threshold voltage transistor and a low threshold voltage transistor. When the low voltage operation device is not working, the low threshold voltage transistor is cut off, and the voltage drop of a high voltage received from the power source terminal of the low voltage operation device is controlled by the high threshold voltage transistor. In contrast, when the low voltage operation device is working, the operation enable signal output thereby conducts the low threshold voltage transistor to control the voltage drop of the high voltage received from the power source terminal, so that a high potential is obtained.
摘要:
The ROM device comprises a number of memory cells each is constructed based on a MOS transistor, the memory cells in the ROM are arranged into a number of rows and a columns. A number of word lines each connects to the gates of each of the MOS transistors of all the memory cells in each of the rows. A number of bit lines each connects to one of the source/drain pair of each of the MOS transistors of all the memory cells in each of the columns. A multiplexer comprises a number of transmitting transistors, each of the transmitting transistors is connected to a corresponding one of the bit lines, forming a current flow path including the transmitting transistor, the connected bit line, and the memory cells correspondingly connected to the bit line. A sense amplifier is coupled to the multiplexer for sensing the current flowing therethrough the current flow path to output a corresponding sense output signal. The method for bypassing null-code sections to comprise programing the transmitting transistor in the current flow path into an off status when all memory cells in the column connecting to the bit line of the transmitting transistor is required to contain null code.
摘要:
A wafer level burn-in method for static-random access memory. The SRAM memory has a plurality of word lines and a plurality of bit lines. The SRAM memory also has pull up circuits and equalizer circuits connected to various bit lines. All the word lines are switched on for testing any leakage in the gate dielectric layer. A high potential is applied to a bit line of every bit line pairs and a low potential is applied to the other bit line of the bit line pairs. The pull-up circuits and the equalizer circuits are shut down. The current at a steady state is used to judge the normality of an SRAM chip.
摘要:
A voltage-reducing device of low power dissipation is provided, including a plurality of transistors, which are self-connected as diode equivalent. These transistors are then cascaded in series in the same direction and coupled to a voltage source. Since every transistor has a threshold voltage, the voltage at the end of the forward-biased cascaded transistors will be lowered than the voltage source so as to provide a reduced voltage source. Furthermore, since the voltage adjustment of the device is based on the threshold voltage, there is hardly any power dissipation. In addition, we can use different threshold voltages from various transistors to provide different combinations of these threshold voltages to obtain the desired voltage drop.
摘要:
An input buffer which is coupled to a direct voltage source and ground, includes at least one CMOS device and an enhancement mode NMOS transistor, receives at least one input signal and provides one output signal. The input buffer makes use of the enhancement mode NMOS transistor to lower the potential difference between the gate terminal and the source terminal of the PMOS transistor of the CMOS device. Thus, the input buffer can lower the turning on degree of the PMOS transistor effectively. Then the PMOS transistor which is considered as a pull-up transistor can lower the degree to which the input buffer is turned on, and maintain the characteristics and functionality of the input buffer.
摘要:
A ROM is formed by depositing a first layer composed of a material selected from polysilicon and polycide on the substrate, patterning the first layer by masking and etching, depositing a dielectric layer over the first layer and patterning the dielectric layer and the first layer into the pattern of first conductor lines, forming a contact window through the dielectric layer down to the substrate, depositing a second layer composed of a material selected from polysilicon and polycide on the device and forming second conductor lines directed orthogonally to the first conductor lines formed from the first layer, and ion implanting into the substrate through the second layer to form a contact region electrically connected to the second conductor lines of the second layer.
摘要:
A communicating apparatus generating low echo includes an output module, a receiving module and a control unit. The output module directs a remote voice signal outputted from the control unit, so that the remote signal is transmitted along a specific direction within a specific range. The receiving module receives a local signal, and transmits to the control unit thereby. Wherein the remote audio signal transmitted from the output module is excluded from the receiving module, thus echo is lowered significantly and communication quality is enhanced.