Abstract: A digital pulse width modulation (DPWM) controlling system for controlling a load of an application circuit with a DPWM unit is provided, which comprises a comparator and a micro-control unit, the comparator receiving a sense signal detected from the load and a reference signal and comparing the sense signal and the reference signal to output an analog comparison signal, and the micro-control unit generating a trigger signal having a minimum pulse width and receiving the analog comparison signal to output a DPWM signal, wherein the micro-control unit adjusts the minimum pulse width of the trigger signal to obtain a pulse width of the DPWM signal in response to the analog comparison signal whenever the sense signal is within a stable duration so as to output the DPWM signal to the application circuit to control the load.

Abstract: A method of forming floating gates for flash memory devices. A plurality of substrates is provided, in which a film to be etched and an overlying masking pattern layer are provided overlying each substrate. Each of the films in a plasma chamber is etched in sequence using the masking pattern layer as an etch mask, a polymer layer being deposited over the inner wall of the plasma chamber during the etching. An intermediary cleaning process is performed in the plasma chamber between the etchings before the deposited polymer layer reaches such a degree as to induce lateral etching on the next film to be etched, thereby improving etching profile of the films.

Abstract: A method of forming floating gates for flash memory devices. A plurality of substrates is provided, in which a film to be etched and an overlying masking pattern layer are provided overlying each substrate. Each of the films in a plasma chamber is etched in sequence using the masking pattern layer as an etch mask, a polymer layer being deposited over the inner wall of the plasma chamber during the etching. An intermediary cleaning process is performed in the plasma chamber between the etchings before the deposited polymer layer reaches such a degree as to induce lateral etching on the next film to be etched, thereby improving etching profile of the films.

Abstract: A programmable precise frequency divider cooperating with a low frequency crystal and an oscillating circuit is disclosed. The divider includes a low frequency oscillating circuit, a preset code memory, a programmable preset code loader, an adder, and a register. The programmable preset code loader loads and latches a preset code either from the preset code memory or a preset code input line coupled to an external data source. The latched preset code and the current value of the register are commonly supplied to the adder. The adder is used to sum up the latched preset code from the programmable preset code loader and the current value from the register and thereby supply a resultant value to the register. The register accumulates the resultant value from the adder to the oscillating signal from the oscillating circuit and then supplies a output clock signal with a required divided frequency.

Abstract: A method and an interface circuit for scanning keys and external resistors of a keypad are disclosed.

Abstract: A compound type keyboard detector is disclosed. It comprises a time-sequencing generator, a keyboard scanner, a column input port and a row input port, a column lock and a row lock, a keyboard-synchronization detector, a keyboard detector and a keyboard decoder. With the unique design of the keyboard detector in conjunction with the various circuits that are associated therewith, a given number of pins can be used for a relatively greater number of input keys, or a smaller number of pins can be used for relatively complicated input keyw. This type of keyboard detector is good for small IC products, and can reduce the manufacturing cost thereof.

Abstract: A magazine having a first side plate and a second side plate connected in parallel between the nail nozzle and handle of a power nail gun for carrying a bar of nails in a longitudinal sliding space defined between the side plates, and a follower plate mounted in the longitudinal sliding space to push the loaded bar of nails toward the nail nozzle of the power nail gun, wherein the follower plate is supported on two compression springs, the compression springs being mounted in a respective chamber on the second side plate at different elevations, each compression spring having a front end connected to the follower plate and a rear end fixedly secured to one end of the second side plate remote from the nozzle plate.

Abstract: A nail magazine structure of a power nailer, including a nail magazine formed with multiple parallel nail head channels on inner face, an intermediate board fixed at a front end of the nail magazine, and a cover board mated with the nail magazine and formed with multiple nail head channels on inner face corresponding to the nail head channels of the nail magazine. A pushing plate is disposed between the nail magazine and the cover board for pushing the T-shaped nails. A preset length of rail is disposed along a rear section of a bottom end of the nail magazine for the cover board to slide back and forth, while a front section of the bottom end of the nail magazine is railfree and connected with the intermediate board, permitting the tips of the nails to protrude out of the nail magazine. The nail heads of different specifications of T-shaped nails are optionally positioned in different nail head channels so as to locate the tips of the nails at a higher or a lower position in the nail magazine.