Abstract:
This invention relates to a drill having hole-drilling alignment precision, and drilling capability, and scrap-release capability. It comprises a drill tip on the cutting part and a drill body with at least two radially reverse screw slots, the drill body comprises an extended clamp part; the drill tip having two more pointed and symmetrical surfaces of pointed, conical, cylindrical shape on the front surface and wedge shape cone on the side surface, the central drilling point on the drill tip of the two symmetrical surfaces forms a point, one side of the symmetrical surface is a cone surface; another side is a scrape surface having an outer side of the front end larger than the drill body, the blade end is installed at the outer side of the scrape surface; a scrap-release slope installed in between the scrape surface and the drill tip to enhance the above mentioned capabilities.
Abstract:
A DC/DC converter. In the DC/DC converter, a DC/DC conversion circuit provides an output voltage to a storage capacitor upon receiving an enable signal. First and second resistors are connected in series to produce a first voltage according to the output voltage. A Schmitt trigger is coupled to the first voltage to output a first control signal through an inverter when the first voltage is smaller than a second voltage and to output a second control signal through the inverter when the first voltage is higher than a third voltage. An oscillator is turned off upon receiving the first control signal such that the DC/DC conversion circuit stops providing the output voltage, and is turned on and outputs the enable signal upon receiving the second control signal such that the DC/DC conversion circuit provides the output voltage to the storage capacitor.
Abstract:
A multilevel reference generator has a plurality of nonlinear standard resistive elements where each resistive element is biased at a constant level to develop a resultant level. The multilevel reference generator has a plurality of mirror sources. Each mirror source is in communication with the one of the plurality of resistive elements such that each mirror source receives the resultant level from the one standard resistive element and provides a mirrored replication of the resultant level. The multilevel reference generator has a plurality of reference level combining circuits. The reference level combining circuit includes a resultant level summing circuit that additively combines the first and second mirrored replication level and a level scaling circuit to create a scaling of the combined first and second mirrored replication levels to create the reference level.
Abstract:
A static random access memory (SRAM) has a plurality of SRAM cells, a first switch unit, a second switch unit, and a capacitor. During read/write operations of the SRAM cells, the first switch unit and the second switch unit are turned on so that two power terminals of the SRAM cells respectively electrically connect to VDD and VSS and that the capacitor electrically connects between VDD and VSS. When the SRAM cells are not accessed, the first switch unit and the second switch unit are turned off and the capacitor keeps a voltage gap between the two power terminals of the SRAM cells greater than a predetermined value.
Abstract translation:静态随机存取存储器(SRAM)具有多个SRAM单元,第一开关单元,第二开关单元和电容器。 在SRAM单元的读/写操作期间,第一开关单元和第二开关单元导通,使得SRAM单元的两个电源端子分别电连接到V DD和V SS 并且电容器在V DD和V SS之间电连接。 当SRAM单元未被访问时,第一开关单元和第二开关单元断开,并且电容器保持SRAM单元的两个电源端子之间的电压间隙大于预定值。
Abstract:
An excrement includes a hollow box body having an opening for covering a cover body thereon. The box body and the cover body are connected to a hanging body. A first inner cup and a second inner cup are contained in the box body. The second inner cup is inserted and disposed into the first inner cup. Each inner cup is in a box shape, which can be flattened into a thin flat sheet. The storage space required for the inner cups is thus reduced. In addition, the accessibility and the portability of the inner cups are also enhanced. Therefore, whenever bringing a pet outdoors, one can easily clean up the excrement of the pet by employing the excrement container of the present invention.
Abstract:
A feedback active noise cancellation headphone is disclosed. A plurality of microphone sensors are disposed in front of the left and the right speakers of the headphone for improving the sound reception quality of the microphone sensors, so that the active noise controlling circuit generates an inverse phase soundwave accurately for countering the low frequency noise, and further to improve the noise reduction performance of the active noise cancellation headphone.
Abstract:
Voltage generating apparatus includes a positive temperature coefficient current generating module, a negative temperature coefficient current generating module, a fine-tune current module and a voltage output module. The function of the positive temperature coefficient current generating module and the negative temperature coefficient current generating module, which take advantage of characteristics of MOS devices operated in the sub-threshold region, is to generate a stable current of positive temperature coefficient and a stable current of negative temperature coefficient, respectively. The current fine-tune module increases or decreases output current of the negative temperature coefficient current generating module. The voltage output module sums two output currents of the positive temperature coefficient current generating module and the negative temperature coefficient current generating module and transforms the total current into output voltage that is stable under temperature and process variation.
Abstract:
A paper tray for use with a printer. The paper tray includes a sidewall, a door plate, a rotating member and a resilient element. The sidewall has a through hole. The door plate pivots on the sidewall and rotates around an X-axis. The rotating member is disposed in the through hole and pivots on the sidewall. The rotating member has an engagement portion and selectively rotates between a first position and a second position around a Y-axis. The resilient element is disposed between the rotating member and the sidewall, providing resilience to the rotating member to rotate to the first position. The rotating member rotates to the second position when exerted to overcome the resilience. The rotating member rotates to the first position by the resilience in the absence of external pressure, such that the engagement portion abuts the door plate.
Abstract:
A system for clock and data recovery (“CDR”) includes a clock generator, a half-rate phase detector for receiving the input data, an encoder, a phase selector outputting recovered clock, a confidence counter, and a multiplexer outputting recovered data. The clock generator generates an 8-phase clock signal at half a rate of the transmitted serial data. The phase detector samples input data at four times the standard sampling rate, takes the oversampled data and detects phase transitions therein, i.e., phase lead and lag. The encoder encodes the phase transition data. The confidence counter receives the phase transition data and generates a signal representing the accumulated net effect of the phase transitions. The phase selector receives the confidence counter signal and the 8-phase clock from the clock generator, and determines the optimum phase for data sampling.
Abstract:
A capacitor for use within a microelectronic product employs a first capacitor plate layer that includes a first series of horizontally separated and interconnected tines. A capacitor dielectric layer separates the first capacitor plate layer from a second capacitor plate layer. The second capacitor plate layer includes a second series of horizontally separated and interconnected tines horizontally interdigitated with the first series of horizontally separated and interconnected tines. The capacitor is formed employing a self-aligned method and the capacitor dielectric layer is formed in a serpentine shape.