Patent application number | Description | Published |
20100150041 | WIRELESS COMMUNICATION APPARATUS HAVING SELF SENSING FUNCTION - Disclosed is a wireless communication apparatus having a self sensing function, which can detect an object by use of a wake-up function without employing a separate sensor. The wireless communication apparatus includes a communication unit wirelessly communicating with a server forming a wireless network, and a wake-up unit waking up the communication unit under the control of the server when the communication unit is in sleep mode, and sensing the presence of an object within a preset communication range according to a reflection signal, which is a signal reflected by the object after being transmitted from the communication unit. | 06-17-2010 |
20110280334 | DIGITAL AMPLITUDE MODULATOR AND POLAR TRANSMITTER USING THEREOF - The present invention provides a digital amplitude modulator and polar transmitter using the same. The polar transmitter includes: a polar converter for converting an input signal into an amplitude information signal and a phase information signal, and outputting the converted amplitude and phase information signal; a sigma-delta modulator for receiving a fractional part of the amplitude information signal, and generating a correcting value for an integer part of the amplitude information signal; a phase-modulator for upward-modulating the phase information signal outputted from the polar converter, and outputting carrier waves including the upward-modulated phase information signal; and a digital power amplifier for generating an output signal whose amplitude corresponds to the integer part of the amplitude information signal which is subjected to correction by the correcting value, and outputting combining the output signal with an output value of the phase-modulator to output the combined signal. | 11-17-2011 |
20110309885 | DELAY CIRCUIT FOR LOW POWER RING OSCILLATOR - Disclosed herein is a delay circuit for a low power ring oscillator. The delay circuit includes: a pair of N type transistors that receive first differential input signals Vin | 12-22-2011 |
20120235801 | Wireless apparatus having wake-up function - A wireless apparatus having a non-electric power-type wake-up function that operates a wake-up circuit waking-up a microprocessor for communications without power. There is provided a wireless apparatus having a wake-up function, including: a wake-up unit that has a rectifying circuit having elements configured as passive elements and rectifies preset first wireless signals to transmit wake-up signals; and a wireless communications unit that is woken-up by the wake-up signals from the wake-up unit to perform communications using preset second wireless signals, in a sleep mode. | 09-20-2012 |
20120268197 | PAD CONTROLLING APPARATUS - Disclosed herein is a pad controlling apparatus controlling current and voltage applied to a pad, the pad controlling apparatus including: a voltage drop unit dropping the voltage applied to the pad; a switching unit connected in parallel with the voltage drop unit; and a control unit comparing a level of the dropped voltage and first reference voltage with each other and turning on the switching unit on when the level of the dropped voltage is larger than the first reference voltage. According to the present invention, even though interrupt occurs from the outside, a chip may be normally operated. | 10-25-2012 |
20130082672 | CAPACITOR-FREE LOW DROP-OUT REGULATOR - There is provided a low drop-out regulator. The low drop-out regulator includes an amplifier including an odd number of operational amplifiers connected to one another in series, and an output unit including a pass transistor operated by an output from the amplifier and generating an output voltage to be applied to a load, wherein the pass transistor is an N-channel transistor, and the amplifier controls a feedback loop gain between an output terminal of one of the odd number of operational amplifiers and the output unit. The feedback loop gain may be controlled independently from the trans-conductance of the pass transistor, whereby the stable output voltage may be generated, even in the case that the load and the input voltage are changed, and the design parameter may be simplified. | 04-04-2013 |
20130107775 | WIRELESS COMMUNICATIONS TERMINAL HAVING RF DIRECT WAKEUP FUNCTION AND WAKEUP METHOD THEREOF | 05-02-2013 |
20140292107 | ELECTRONIC SHELF LABEL (ESL) TAG - Disclosed herein is an electronic shelf label (ESL) tag including a power adjusting unit connected to the battery to receive power, wherein the power adjusting unit boosts power and provides the boosted power to an IC when the IC is in an active mode, and transfers the power to the IC as it is when the IC is in a sleep mode. Therefore, the ESL tag may be normally operated even though a voltage drop phenomenon of a battery occurs. | 10-02-2014 |