Abstract:
An embedded PCB, a multi-layer PCB using the embedded PCB, and a method of manufacturing the same are provided. The method of manufacturing an embedded PCB includes a first step of patterning an insulating layer on which a photoresist layer is formed using a laser such that parts of the insulating layer are selectively etched to form a circuit pattern region and a second step of filling the circuit pattern region with a plating material to form a circuit pattern. Accordingly, the method of manufacturing an embedded PCB can simultaneously or sequentially etch a photoresist layer and an insulating layer using a laser to form a circuit pattern so as to obtain a micro pattern and simplify a manufacturing process and achieve alignment accuracy in construction of a multi-layer PCB using the embedded PCB to thereby improve product reliability and yield.
Abstract:
An apparatus and a method for performing an attenuation function on a signal using an attenuator in a cable broadcast receiver having a Low Noise Amplifier (LNA) that does not perform an attenuation function on a signal are provided. In the method, an input Radio Frequency (RF) signal is tuned, The RF signal is converted into an Intermediate Frequency (IF) signal. An intensity of the converted IF signal is compared to a threshold, and an RF Automatic Gain Control (AGC) value is generated based on a result of the comparison. When the generated RF AGC value is smaller than an RF AGC threshold, the attenuator is turned on to attenuate the input RF signal by a predefined amount. Therefore, a high SNR, such as in an analog-digital composite signal, may be obtained without using an LNA that performs an attenuation function on a signal.
Abstract:
A tuning method comprises: detecting a fundamental intermediate frequency IF0 of a channel to be received; determining whether the fundamental intermediate frequency IF0 is affected by an adjacent channel; when the fundamental intermediate frequency IF0 is affected by the adjacent channel, detecting a tuning intermediate frequency that is not affected by the adjacent channel while changing the fundamental intermediate frequency IF0; when there is no variable intermediate frequency that is not affected by the adjacent channel, detecting a variable intermediate frequency that is least affected by the adjacent channel as the tuning intermediate frequency; and tuning the channel using the tuning intermediate frequency. A tuning apparatus comprises: a tuner for detecting a fundamental intermediate frequency IF0 of a channel to be received, a flash memory for storing a tuning algorithm, and a demodulator for detecting a tuning intermediate frequency while changing the fundamental intermediate frequency IF0, and for tuning the channel using the tuning intermediate frequency based on a prescribed tuning algorithm, the tuning intermediate frequency being a variable intermediate frequency IFn that is not affected by an adjacent channel.
Abstract:
A tuning method comprises: detecting a fundamental intermediate frequency IF0 of a channel to be received; determining whether the fundamental intermediate frequency IF0 is affected by an adjacent channel; when the fundamental intermediate frequency IF0 is affected by the adjacent channel, detecting a tuning intermediate frequency that is not affected by the adjacent channel while changing the fundamental intermediate frequency IF0; when there is no variable intermediate frequency that is not affected by the adjacent channel, detecting a variable intermediate frequency that is least affected by the adjacent channel as the tuning intermediate frequency; and tuning the channel using the tuning intermediate frequency. A tuning apparatus comprises: a tuner for detecting a fundamental intermediate frequency IF0 of a channel to be received, a flash memory for storing a tuning algorithm, and a demodulator for detecting a tuning intermediate frequency while changing the fundamental intermediate frequency IF0, and for tuning the channel using the tuning intermediate frequency based on a prescribed tuning algorithm, the tuning intermediate frequency being a variable intermediate frequency IFn that is not affected by an adjacent channel.
Abstract:
A system and method for providing notification of a reception limitation status of a receiving mobile telephone. The system and method employ the operations of electing a reception limitation reason after setting up reception limitation mode of operation for the receiving mobile terminal, converting the mobile terminal from a current mode of operation to a reception limitation mode of operation, determining whether the reception limitation has been set up for the receiving mobile terminal when a voice call is generated, providing bits corresponding to the reception limitation reason of the receiving mobile terminal based on an order qualification code (ORDQ) field of a release order, transmitting the bits corresponding to the reception limitation reason from the receiving mobile terminal to the base station when the reception limitation mode of operation has been established for the receiving terminal, transmitting the received bits in the ORDQ field of the release order to a calling mobile terminal from the base station, providing notification at the calling mobile terminal of the reception limitation reason corresponding to the received ORDQ bit value from the base station.
Abstract:
The present invention relates to a mobile communication terminal for Push To Talk (PTT) and a method for processing missed call information thereof, which allows a receiver to check why an originator requested the PTT telephone call during the absence of the receiver through missed call information. The missed call information includes the voice of the originator requesting the PTT call, and the voice of the originator is output when confirmation of the missed call information is requested.
Abstract:
An apparatus and a method for performing an attenuation function on a signal using an attenuator in a cable broadcast receiver having a Low Noise Amplifier (LNA) that does not perform an attenuation function on a signal are provided. In the method, an input Radio Frequency (RF) signal is tuned, The RF signal is converted into an Intermediate Frequency (IF) signal. An intensity of the converted IF signal is compared to a threshold, and an RF Automatic Gain Control (AGC) value is generated based on a result of the comparison. When the generated RF AGC value is smaller than an RF AGC threshold, the attenuator is turned on to attenuate the input RF signal by a predefined amount. Therefore, a high SNR, such as in an analog-digital composite signal, may be obtained without using an LNA that performs an attenuation function on a signal.
Abstract:
An image forming apparatus and an image quality calibration method in the image forming apparatus, the image forming apparatus including a printing unit to print a calibration chart in one mode selected from a plurality of resolution modes, a scanning unit to scan the printed calibration chart, and a calibrating unit to calibrate an image using color values of the scanned calibration chart according to the plurality of resolution modes.