Abstract: A method for manufacturing a metal-oxide-semico nductor field effect transistor (MOSFET) having a drain and a source each of which has a lightly doped area, an enhanced lightly doped area and a heavily doped area is disclosed.

Abstract: A new structure of a non-volatile semiconductor memory cell array and a method of fabricating the memory arrays. The circuit layout of the memory array not only comprises of the conventional floating gates, control gates, cell sources and cell drains, but also adds the local source regions to increase the coupling ratio. Besides, the new design can reduce the number of metal contact windows, further increase the packing density of the memory array. Furthermore, an additional isolation region is formed between two bit lines so as to increase the distance between two bit lines, which can minimize the possibility of cross talk due to shirking spacing.

Abstract: An intelligent bias voltage generating circuit capable of providing an electronic device with a reliable bias signal includes a power input terminal which is electrically connected to a power generating device for providing a power input, and a bias voltage generating circuit which is electrically connected to the power input terminal for responding to power fluctuations and generating a bias voltage signal output by a multi-section linear variation method.

Abstract: An adjustable-period dual-tone multifrequency (DTMF) generator, which includes a plurality of programmable counters or up/down counters, a control unit, a memory unit for storing data, a digital adder, and a digital-to-analog converter. The programmable counter and the control unit are combined together to form into at least two programmable counting address generators, in which the circuit is a digit-process circuit for overcoming the problem of signal distortion that usually exists in an analog circuit.

Abstract: A method is provided for manufacturing a polysilicon with a relatively small line width. The method includes steps of: a) forming a first layer of photoresist with a line pattern having a first line interval and a first line width over the polysilicon; b) etching a portion of the polysilicon for forming the polysilicon with a second line interval x and a second line width y respectively equal to the first line interval and the first line width; c) forming a second layer of photoresist with a third line interval and a third line width over the polysilicon; d) etching another portion of the polysilicon for forming the polysilicon with a fourth line interval x`, equal to the third line interval, and a fourth line width y`; e) depositing a polysilicon film over the polysilicon with the relatively small line width; and f) etching a portion of the polysilicon film to form sidewalls of the polysilicon with the relatively small line width for adjusting the relatively small line width of the polysilicon.

Abstract: The present invention relates to methods and devices for generating cycled waveforms of nonsingle period, and more particularly to an improvement from the one-way counter used by conventional cycled waveform generator of nonsingle period into an up-down counter or a programmable up-down counter, along with an adder/subtracter. Thus, only the varied values in waveform relative to a DC level have to be filled into a table, and then the varied values in waveform (i.e. the digital waveform sampling values) are input into said adder/subtracter to obtain a periodic digital values by adding/subtracting with a predetermined DC level. Finally, cycled waveforms of nonsingle period are obtained by digital-to-analog converting of said digital values. With the methods and devices of the present invention, not only the fillings in said table can be decreased to reduce the cost, but also the DC output level can be fixed or adjusted arbitrarily for convenient signal processing.

Abstract: Disclosed is a digital filter having phase-adjustment ability, and more particularly to a digital filter system which can restore the phase of data transmitted via digital radio communication and thereby enhances the noise-immunity of data and the correct bit decision. The digital filter mainly includes a hold back data unit, a digital filter unit, and a signal phase modify unit to remove noises in the signals and to modify and restore correct digital wave-form signals. The digital filter having phase-adjustment ability is suitable for use in digital radio phones, pagers, etc. commonly found in the radio communication systems.

Abstract: A voltage detector circuit for instantaneously detecting abnormal voltages in a micro controller includes a voltage detection circuit connected between the power supply and reset voltage ends of an internal circuit of the micro controller so as to instantaneously detect changes in the power supply, without the time delay associated with the external low pass filter that supplies the reset voltage. The detecting circuit is a logic "NOT" gate which has a power supply connecting end connected to a reset voltage end of the internal circuit, an input end connected to the power supply end of the internal circuit, and an output end connected to a cooperating input end of the latch circuit, so that the latch circuit latches a signal output by the voltage detector whenever an abnormal power supply voltage is detected, and outputs a flag signal to the micro controller to effect an instantaneous reset of the micro controller.

Abstract: The present invention provides an encoding-decoding method for an actuating system having an encoding device, a decoding device, at least one code having a counter code, and an actuating device. The method includes steps of: a) executing a first logic operation on said at least one code for obtaining a specific expansion code in said encoding device to form a transmission code including said specific expansion code and said counter code; b) transmitting said transmission code to said decoding device; and c) executing a second logic operation on said at least one code and said counter code to obtain an operated code for identifying whether said operated code is matchable with said specific expansion code in said decoding device.

Abstract: The present invention is related to a system reset device setting the reset status of a system in response to a reset signal. The system reset device according to the present invention includes a power-stability detecting circuit for detecting the stability of a power signal generated by a power source and provided for the system, an oscillation-stability detecting circuit for detecting the stability of an oscillation signal generated by an oscillator and provided for the system, and a level-control circuit electrically connected to the power-stability detecting circuit and the oscillation-stability detecting circuit for controlling a level state of the rest signal in response to the stability of the power signal and the oscillation signal. The level-control circuit includes an OR gate, an AND gate, and an S-R latch for performing the level state control of the reset signal.

Abstract: A device for raising voltage comprises a first element for providing a first output pin with a voltage raise in response to a first voltage change at a first input pin, and for providing a second output pin with a voltage raise in response to a second voltage change at a second input pin; and a second element for driving, when the voltage at the first output pin becomes higher than the voltage at the second output pin due to the first voltage change at the first input pin, the second output pin to maintain a voltage keeping pace with the voltage at the first output pin, and for driving, when the voltage at the second output pin becomes higher than the voltage at the first output pin due to the second voltage change at the second input pin, the first output pin to maintain a voltage keeping pace with the voltage at the second output pin.

Abstract: A timer which provides both the surveying and counting functions. It contains a counter, a multiplexer, an edge-triggered controller, a time-base latching circuit, and a pulse-detecting circuit. It not only can be used as a timer, but can also be used as a counter to count the number of the external signals so as to detect the width of an external signal.

Abstract: The present invention relates to a reset signal generator adapted to be used with a microprocessor for generating a reset signal to initialize the microprocessor, which includes an oscillator to generate a fixed clock signal, a counter electrically connected to the oscillator for generating a cyclic signal in response to the fixed clock signal and outputting the reset signal at an end of a period of the cyclic signal, and a clear signal generating device electrically connected to the counter and outputting a clear signal for the counter in response to an output signal from the microprocessor. The present invention ensures that when the microprocessor is abnormal or down it will be initialized by the reset signal.

Abstract: The present invention is related to a flexible IC layout method utilized for an IC having a plurality of logic gates in a first direction connected with a plurality of logic gates in a second direction wherein each of the logic gates has at least one polysilicon region and each of the logic gates in the first direction has an output serving as an input of a corresponding one of the logic gates in the second direction, which includes a step of forming input terminals for the logic gates by ion implantation. The present invention is flexible because the addition or deduction of the number of the input terminals according to the present invention can be achieved by ion implantation.

Abstract: A cost effective waveform-generating apparatus that generates accurate and precise waveforms is disclosed. The present waveform-generating apparatus includes a memory for storing a sequence of sampled amplitudes of a waveform, said sampled amplitudes constituting at least two periods of said waveform; a counting circuit, electrically connected to the memory, responsive to a clock signal for generating counting signals; a controlling circuit, electrically connected to the memory and the counting circuit, responsive to the counting signals for controlling the memory to output the sampled amplitudes recurrently; and a digital to analog converter, electrically connected to the memory, for converting the recurrent sampled amplitudes into an analog output.

Abstract: An encoding control device includes a voltage provider providing different voltage levels at different instances, a data control device electrically connected to the voltage provider and outputting data respectively corresponding to the voltage levels, and an encoding device electrically connected to the data control device for encoding according to the data. The present encoding control device effectively reduces the pin number of an IC package.

Abstract: A cost-effective and/or convenient digital plate being palpably controllable is provided. The digital plate includes an induction plate capable of inducing a change of a parameter when in contact with an object having a reactant property, a measurer for sensing the change, and a controller having an output for converting the change into a parametral information to be sent to the output.

Abstract: A digital-to-analog converter includes a generator responsive to a digital input signal, a set of switches each being directly connected to the generator, and a first and a second terminals connecting therebetween a resistor device having a plurality of nodes directly connected to the switches in order that a node voltage can be obtained between one of the nodes and one of the terminals to serve as an analog signal. Such converter has a low distortion/noise and can be used in a broad source voltage scope.