摘要:
Provided is a capacitive touch sensor which includes a flat panel display for displaying an image and a touch sensor panel positioned on the flat panel display or embedded in the flat panel display. The capacitive touch sensor may include: a driving clock generator configured to generate time-periodic output signals with respect to a plurality of times, and apply the generated time-periodic output signals to the touch sensor panel and a receiver circuit unit; a driver configured to generate a driving signal of the touch sensor panel using a part of the output signals of the driving clock generator; and the receiver circuit unit configured to process noise contained in a signal received from the touch sensor panel, using the output signals.
摘要:
Provided is a capacitive touch sensor which includes a flat panel display for displaying an image and a touch sensor panel positioned on the flat panel display or embedded in the flat panel display. The capacitive touch sensor may include: a driving clock generator configured to generate a plurality of time-periodic output signals by using a gate driver signal of the flat panel display, and apply the generated time-periodic output signals to the touch sensor panel and a receiver circuit unit; a driver configured to generate a driving signal of the touch sensor panel using a part of the output signals of the driving clock generator; and the receiver circuit unit configured to process noise contained in a signal received from the touch sensor panel, using the output signals.
摘要:
When a time difference is amplified by a time difference amplifier, slew rates of internal output voltages are changed according to a phase combination of digital input signals so that a time gain is determined by a ratio between the slew rates and the slew rates can be controlled from an outside. After a voltage is charged to the level of a power supply voltage in first and second charging capacitors, the charged voltage of the first charging capacitor is decreased with a first slew rate when a first digital input signal transitions, and both charged voltages of the first and second charging capacitors are decreased with a second slew rate when a second digital input signal transitions so that both first and second digital input signals are changed from initial phases, while being compared with a reference voltage to generate first and second digital output signals.
摘要:
A serpentine guard trace for reducing far-end crosstalk of a micro strip transmission line is provided. The serpentine guard trace reduces receiving-end crosstalk caused by an electromagnetic interference of a signal of a nearby transmission line when transmitting a high speed signal through a micro strip transmission line on a printed circuit board. The serpentine guard trace is located between two nearby transmission lines and has a line width narrower than that of transmission lines for an effective serpentine structure. A characteristic impedance of the serpentine guard trace increases due to the narrow line width. Termination resistors having impedance which is the same as the characteristic impedance of the serpentine guard trace are located on both ends of the guard trace to minimize a reflection wave generated in the serpentine guard trace. The receiving-end crosstalk can be effectively reduced by using the serpentine guard trace instead of a linear guard trace. Accordingly, the serpentine guard trace can be effectively used when a high speed signal is transmitted on a printed circuit board.
摘要:
Provided is a memory system having a multi-drop bus structure. The memory system includes a bus, a memory controller in which a port connected to the bus is terminated by a resistor having a first impedance value, a connector connected to a point having the first impedance value from the memory controller on a bus line, and a memory module connected to the connector. The memory module includes a first load connected to the connector and having the first impedance value, a second load connected to the first load and having a second impedance value, a first chip in which a port connected to the second load is terminated by a resistor having the second impedance value, a via hole penetrating a printed circuit board of the memory module between the first load and the second load, a third load connected to the via hole and having the second impedance value, and a second chip in which a port connected to the third load is terminated by a resistor having the second impedance value. The first load, the second load, and a first chip are formed on a first surface of the memory module while the third load and the second chip are formed on a second surface thereof.
摘要:
A transmitter system for transmitting parallel data by compensating a crosstalk includes: first and second transmission lines parallel to each other; a first inverted crosstalk pulse generation unit configured to receive first transmission data and inverted first transmission data and output a first inverted crosstalk pulse according to a data mode; a second inverted crosstalk pulse generation unit configured to receive second transmission data transmitted in parallel to the first transmission data and inverted second transmission data and output a second inverted crosstalk pulse according to the data mode; a first addition unit configured to combine the first transmission data and the second inverted crosstalk pulse and output first compensation data to be transmitted to the first transmission line; and a second addition unit configured to combine the second transmission data and the first inverted crosstalk pulse and output second compensation data to be transmitted to the second transmission line.
摘要:
Provided is an integrating receiver having an adaptive decision feedback equalizer function and a system having the same. The integrating receiver can simultaneously remove an inter-symbol interference (ISI) and high frequency noises in a high speed DRAM data transmission system. The integrating receiver reduces a probability of wrong decision of data in a state in which the ISI that exists in a channel is removed so as to increase a signal-to-noise ratio (SNR) of a receiver, so that a maximum operation speed increases even in an environment with heavy noises. There is also provided a method of obtaining an equalizer coefficient suitable for the integrating receiver and a method of obtaining a reference voltage by using an integrator in a single ended transmission method. In addition, in order to increase a decision feedback equalizer speed, a look-ahead method is used. In this method, flip flops with a high speed including multiplexers are used. Accordingly, the present invention can be applied to not only a DRAM interface system but also a serial communication between chips.
摘要:
Provided is a dual loop DLL for generating an internal clock signal synchronized with an external clock, which includes a reference DLL receiving a reference clock and generating a plurality of phase clock signals having a first phase difference, a coarse loop selecting one of the phase clock signals and generating first through third digital codes to allow the internal clock signal to have a phase difference smaller than a second phase difference with respect to the external clock, and a fine loop selecting two of the phase clock signals and synchronizing the internal clock signal with the external clock, in response to the first through third digital codes.
摘要:
A transmitter system for transmitting parallel data by compensating a crosstalk includes: first and second transmission lines parallel to each other; a first inverted crosstalk pulse generation unit configured to receive first transmission data and inverted first transmission data and output a first inverted crosstalk pulse according to a data mode; a second inverted crosstalk pulse generation unit configured to receive second transmission data transmitted in parallel to the first transmission data and inverted second transmission data and output a second inverted crosstalk pulse according to the data mode; a first addition unit configured to combine the first transmission data and the second inverted crosstalk pulse and output first compensation data to be transmitted to the first transmission line; and a second addition unit configured to combine the second transmission data and the first inverted crosstalk pulse and output second compensation data to be transmitted to the second transmission line.
摘要:
Provided is a microstrip transmission line for reducing far-end crosstalk. In a conventional microstrip transmission line on a printed circuit board, a capacitive coupling between adjacent signal lines is smaller than an inductive coupling therebetween, so that far-end crosstalk occurs. According to the present invention, the capacitive coupling between the adjacent signal lines is increased to reduce the far-end crosstalk. A vertical-stub type microstrip transmission line is provided.