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US 6,959,060 B2Granted
Jitter reducing apparatus using digital modulation technique
AssigneeLG Electronics Inc.
InventorWoon Jin Jung
Life of this patent
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Abstract
A jitter reducing apparatus using a digital modulation technique includes: an elastic store storing data flowed in from an SDH network; a pattern generator controlling a data read speed so the elastic store maintains a constant data storing amount; a modulation sequencer generating a digital signal wave having a constant period and amplitude; and a phase level detector controlling the pattern generator using the digital signal wave of the modulation sequencer.
Claims19
A jitter reducing apparatus, comprising:
- an elastic store that stores data received from a synchronous digital hierarchy (SDH) network;
- a pattern generator that controls a data read speed so the elastic store maintains a constant amount of stored data;
- a modulation sequencer that outputs signals representative of a digital signal wave having a constant period and amplitude, wherein the output signals include a signal indicative of an amplitude of the digital signal wave and a signal indicative of a direction of the digital signal wave;
- and
- a phase level detector that controls the pattern generator based on the signals output from the modulation sequencer.
2 more elements
An apparatus comprising:
- an elastic store device to store data;
- a pattern generator to control a data read speed from the elastic store device so as to maintain an approximately constant amount of stored data;
- a phase level device to control the pattern generator;
- and
- a modulation sequencer to output signals representative of a digital signal wave to the phase level device, the output signals including at least an amplitude signal and a slope signal.
2 more elements
An apparatus comprising:
- an elastic store device to store data;
- a modulation sequencer device to output signals representative of a digital signal;
- and
- a device to receive the signals output from the modulation sequencer device and to control a data read speed from the elastic store device, wherein the signals output from the modulation sequencer device include signals indicative of a slope of a digital signal or an amplitude of the digital signal, wherein the modulation sequence device outputs a mode-value signal indicative of an amplitude level of the digital signal and a mode-slope signal indicative of a positive direction or a negative direction of the digital signal.
1 more element
Dependencies are inferred from the claim text.