摘要:
A phase-locked loop (PLL) having a bias generator capable of reducing noise is provided. In the PLL, a voltage controlled oscillator is driven using a regulator. The bias generator, which applies a bias voltage to the regulator, is configured to have opposite power noise characteristics to the power noise characteristics of the regulator, such that the occurrence of jitter in the PLL is reduced.
摘要:
An AC-coupling phase interpolator and a DLL using the same are provided. The AC-coupling phase interpolator includes a coupling capacitor generating and outputting a coupling signal by AC-coupling to an interpolation signal obtained by phase-interpolating an input signal. Thereby, it is possible to correct duty of an input signal and adjust the level of an output signal.
摘要:
A data communication device or system includes a preamble unit and a data interface. The preamble unit generates or detects a first preamble having a first length for a first data line, and generates or detects a second preamble having a second length for a second data line. The first length is different from the second length, and data on the first and second data lines form parallel data. The data interface communicates a first data with the first preamble via the first data line and communicates a second data with the second preamble via the second data line. The respective length and/or respective pattern of each preamble are adjustable and/or programmable.
摘要:
Provided are a semiconductor memory device having a source synchronous interface capable of reducing jitter while minimizing overhead and a clocking method thereof. The semiconductor memory device comprises a phase locked loop (PLL) circuit receiving a first external clock signal for a command and address signal and generating a first internal clock signal, a first delay locked loop (DLL) circuit receiving a second external clock signal for predetermined bits of data and the first internal clock signal and generating a second internal clock signal locked to the second external clock signal, and a second DLL circuit receiving a third external clock signal for the remaining bits of the data and the first internal clock signal and generating a third internal clock signal locked to the third external clock signal.
摘要:
An AC-coupling phase interpolator and a DLL using the same are provided. The AC-coupling phase interpolator includes a coupling capacitor generating and outputting a coupling signal by AC-coupling to an interpolation signal obtained by phase-interpolating an input signal. Thereby, it is possible to correct duty of an input signal and adjust the level of an output signal.
摘要:
A memory interface circuit is provided, comprising: a first signal output circuit configured to output a first signal via a first signal line to a first I/O terminal; a second signal output circuit configured to output a second signal via a second signal line to a second I/O terminal; and a noise cancellation circuit having at least one phase adjusting element and at least one gain adjusting element to reduce a noise signal induced on the second signal line due to the presence of the first signal on the first signal line, wherein the second signal line is disposed adjacent to the first signal line.
摘要:
A voltage-controlled oscillator includes an oscillating unit configured to output first and second output clock signals at first and second nodes, respectively, the first and second output clock signals having a frequency that is variable in response to a control voltage. An active element unit connected to the oscillating unit is configured to maintain oscillation of the oscillating unit. A bias current generating unit connected to the active element unit at a bias node provides a bias current to the bias node and is adapted to adjust the bias current in response to a control code. First and second capacitor blocks connected to the oscillating unit and the active element unit provide first and second load capacitances, respectively, to the first and second nodes, respectively, in response to the control code.
摘要:
A data communication device or system includes a preamble unit and a data interface. The preamble unit generates or detects a first preamble having a first length for a first data line, and generates or detects a second preamble having a second length for a second data line. The first length is different from the second length, and data on the first and second data lines form parallel data. The data interface communicates a first data with the first preamble via the first data line and communicates a second data with the second preamble via the second data line. The respective length and/or respective pattern of each preamble are adjustable and/or programmable.
摘要:
Example embodiments relate to a receiving apparatus and method thereof. In an example, the receiving apparatus may include a clock generating unit generating a plurality of internal clock signals based on a received external clock signal and an equalization receiving unit receiving the plurality of internal clock signals and an input signal. The equalization receiving unit may determine an offset value and an equalization coefficient in an initial setting mode and may adjust the received data signal based on the determined offset value and equalization coefficient.
摘要:
A majority voter circuit is configured to generate a selecting signal based on first input data and inverted first input data. The first input data and the inverted first input data each include an odd-number of bits, and the odd-number of bits include bits of a first type and bits of a second type. The generated selecting signal is indicative of which of the first type and the second type of bits in the first input data are in the majority.