Abstract: A power saving wakeup device for wireless mouse is disclosed. The wireless mouse has a microprocessor with a wake-up pin, and is waked up from the power saving mode when the wake-up pin is triggered. The wakeup device includes a contact conductor and a flexible conductor. The contact conductor is connected to the wake-up pin of the microprocessor. The flexible conductor is connected to a predetermined voltage level and separated by a predetermined distance from the contact conductor, such that the flexible conductor can contact with the contact conductor when the flexible conductor is vibrated. Thus, when the wireless mouse is moved to cause the flexible conductor to contact with the contact conductor, the wake-up pin is triggered by the predetermined potential.

Abstract: In a capacitive sensor, a sensing electrode is positively charged, the sensing electrode and a sensing capacitor are charge-balanced, the sensing electrode is negatively charged, and then the sensing electrode and the sensing capacitor are again charge-balanced. The sensing electrode is positively and negatively charged in the same period when the capacitive sensor is sensed. So, the invention can not only effectively improve the high-frequency external interference but also effectively resist the interference when an external direct current electrical field approaches.

Abstract: A capacitive sensor includes a sensing electro, control unit, first and second comparator wherein the sensing electro includes a first and a second conduct ports. A positive input terminal of the first comparator and a negative input terminal of the second comparator are coupled to the first conduct port. A positive input terminal of the second comparator and a negative input terminal of the first comparator are coupled to the second conduct port. The first and second comparators respectively output first and second comparing signals according to voltages of the positive and the negative terminals thereof. The control unit charges the first conduct port and discharges the second conduct port when the first and second comparing signals correspondingly are in first and second logic states. The control unit is operable on the contrary when the first and second comparing signals are in opposition to the abovementioned description.

Abstract: The present invention relates to a touch sensor with electrostatic immunity and sensing method thereof. The touch sensor includes a sensing electrode, a discharge element, a sensing-controlling terminal and an input-output (I/O) control terminal, wherein the discharge element is coupled between the sensing-controlling terminal and the I/O control terminal and the sensing electrode is coupled to the sensing-controlling terminal. The essence of the present invention is using charge-discharge through the sensing-controlling terminal and the I/O control terminal for sensing whether a conductor contacts the sensing electrode. There are corresponding compensations no matter an electrostatic charge on the sensing electrode is positive charge or negative charge. Therefore, the influence of electrostatic charge can be eliminated.

Abstract: A method for measuring a velocity of a conductor pressing on a capacitive sensor. The method includes: sampling a capacitance of a sensing electrode at each preset time; providing a threshold value; and determining the velocity of the conductor pressing on the capacitive sensor according to a specific period, wherein the specific period is defined as a period of time ranging from the time when the capacitance reaches the threshold value to the time when the capacitance reaches a peak value.

Abstract: A method for measuring a speed of a conductor slipping through a capacitive sensor. The method includes: sampling a capacitance of a sensing electrode at each preset time; determining a first threshold value and a second threshold value according to a peak value of the capacitance when the capacitance achieves the peak value; and determining the speed of the conductor slipping through the capacitive sensor by the first period and the second period, wherein the first period is defined as a period of time ranging from the time when the capacitance reaches the first threshold value to the time when the capacitance reaches the peak value and the second period is defined as a period of time ranging from the time when the capacitance reaches the peak value to the time when the capacitance reaches the second threshold value.

Abstract: A multi-function voltage regulator for both DCDC function and LDO function includes a first transistor, a second transistor and a voltage control unit. The first transistor has a first terminal and a second terminal respectively connected to a first node and a second node. The second transistor has a first terminal and a second terminal respectively connected to the first node and a third node (voltage output node). The voltage control unit has a first output terminal and a second output terminal for respectively controlling actions of the first transistor and the second transistor so that an output voltage of the third node is a default voltage. The voltage control unit further has a first input terminal, a second input terminal and a ground terminal respectively connected to the second node, the third node and a ground node. The voltage control unit utilizes a voltage of the second node as a mode selection signal to select the DCDC function or LDO function.

Abstract: A capacitance touch sensor includes a square wave generator for generating a square wave clock, a sensor panel for receiving the square wave clock and then generating a panel signal, a peak detector for receiving the panel signal and then generating an analog peak signal, an analog-to-digital converter for receiving the analog peak signal and then generating a digital peak signal, and a control unit for receiving the digital peak signal and generating a detection signal according to a level of the digital peak signal to indicate whether the sensor panel is touched or not.

Abstract: A circuit for eliminating pop sounds at power on and off by a moderate waveform, which includes a switch, a feedback network, an operational amplifier and an output network. When power-on, a first input terminal of the switch is connected to a low voltage, and an output terminal of the output network provides an operating DC bias which is gradually increased. When power-off, the first input terminal of the switch is connected to a reference voltage, and the output terminal of the output network provides an operating DC bias which is gradually reduced.

Abstract: Audio system and related method integrated with ultrasound communication functionality are provided. A communication transmitting device of proposed invention modulates a communication signal of communication functionality to a high-frequency sound and transmits the high-frequency sound by an ordinary audio transmitter. A communication receiving device of proposed invention receives the high-frequency sound with an ordinary audio receiver and demodulates it to retrieve the communication signal, and then the communication device can use the communication signal. The proposed audio sound transmitter/receiver can be implemented using low-cost audio speaker/microphone, such that a cost for implementing communication functionality can be reduced.

Abstract: An exposure control system and method for an image sensor, which includes an image sensor, an illuminator, a controller and a light separator. The image sensor has plural photosensitive pixels in a two-dimensional matrix arrangement. When an exposure is operated in a sub-region of the plural photosensitive pixels, the illuminator produces a flashlight as a light source for exposure. The light separator eliminates light except the flashlight. The controller sequentially activates each row of pixels in the sub-region, and when each row of pixels is in an exposure state, the controller drives the illuminator to produce the flashlight.

Abstract: A multi-function voltage regulator for both DCDC function and LDO function includes a first transistor, a second transistor and a voltage control unit. The first transistor has a first terminal and a second terminal respectively connected to a first node and a second node. The second transistor has a first terminal and a second terminal respectively connected to the first node and a third node (voltage output node). The voltage control unit has a first output terminal and a second output terminal for respectively controlling actions of the first transistor and the second transistor so that an output voltage of the third node is a default voltage. The voltage control unit further has a first input terminal, a second input terminal and a ground terminal respectively connected to the second node, the third node and a ground node. The voltage control unit utilizes a voltage of the second node as a mode selection signal to select the DCDC function or LDO function.

Abstract: A touch pad and a position detecting circuit and method thereof are provided. The touch pad uses a waveform generator to generate an input signal; the input signal is capable of gradually moving a position of a zero voltage on the sensing pad in a predetermined direction. The touch pad also uses the zero voltage detector to detect when a zero voltage of the sensing signal of the sensing pen occurs so as to determine the position of the sensing pen on the sensing pad. Hence, the analog-to-digital converter is not required. Therefore, the resolution can be easily expanded, and the cost, the preciseness, and the specification can be easily controlled.

Abstract: An enhanced structure of extensible time-sharing bus, which essentially uses an address and data bus in time-sharing to send addresses and data between a microprocessor and a memory through a microprocessor interface and a memory interface, and a logic combination of two control lines to determine address transfer, data read or data write on the address and data bus, thereby reducing interface pins and obtaining flexible and multiplicative memory.

Abstract: A motion detection system is disclosed. The invention comprises a touch panel, a plurality of switching units, a detection unit and a control unit. The touch panel comprises a plurality of metal sensors, each of which in turn is set as a detecting sensor. Each switching unit is electrically connected to a corresponding metal sensor respectively for switching voltage. During a charge stage, the detection unit calculates the discharge time of the detecting sensor and generates a detection result signal. The control unit generates a motion signal according to the detection result signal generated by the detection unit. Based on the capacitive effect and simple hardware architecture, the invention can be employed in option or orientation control by detecting a human hand's movement on the touch panel.

Abstract: A power saving wakeup device for wireless mouse is disclosed. The wireless mouse has a microprocessor with a wake-up pin, and is waked up from the power saving mode when the wake-up pin is triggered. The wakeup device includes a contact conductor and a flexible conductor. The contact conductor is connected to the wake-up pin of the microprocessor. The flexible conductor is connected to a predetermined voltage level and separated by a predetermined distance from the contact conductor, such that the flexible conductor can contact with the contact conductor when the flexible conductor is vibrated. Thus, when the wireless mouse is moved to cause the flexible conductor to contact with the contact conductor, the wake-up pin is triggered by the predetermined potential.

Abstract: An exposure control system and method for an image sensor, which includes an image sensor, an illuminator, a controller and a light separator. The image sensor has plural photosensitive pixels in a two-dimensional matrix arrangement. When an exposure is operated in a sub-region of the plural photosensitive pixels, the illuminator produces a flashlight as a light source for exposure. The light separator eliminates light except the flashlight. The controller sequentially activates each row of pixels in the sub-region, and when each row of pixels is in an exposure state, the controller drives the illuminator to produce the flashlight.

Abstract: A panel sensing device and a positioning location searching method of the same are disclosed. A control unit serves to provide at least one reference voltage and at least one reference voltage with opposite phase. Thereby, a plurality of position blocks are defined by the electric field distributions produced by the reference voltages. A sensing pen is used to touch the sensing plate for sensing the object voltage of a touch position. The control unit searches the touch position according to the phase and level of the object voltage and the reference voltages.

Abstract: A radio frequency identification (RFID) communication system and the search method thereof are disclosed, which apply search instructions and reads instructions to communicate between a read and a plurality of transponders. Each transponder generates a random number for comparison with received search instructions. When the random number meets with the number of received search instructions, a response request is sent by a corresponding transponder such that the reader can read the content of the corresponding transponder.

Abstract: An enhanced structure of extensible time-sharing bus, which essentially uses an address and data bus in time-sharing to send addresses and data between a microprocessor and a memory through a microprocessor interface and a memory interface, and a logic combination of two control lines to determine address transfer, data read or data write on the address and data bus, thereby reducing interface pins and obtaining flexible and multiplicative memory.