Control unit for transmission system
AssigneeNXP B.V.
InventorsOlivier Jérôme Célestin Jamin, Amandine Lesellier
Life of this patent
Estimating the term…
Abstract
Control unit for a transmission system, including: a sample rate converter, which is coupled to a digital-to-analog converting unit, wherein digital input data (data_in) are feedable to the sample rate converter; a PRBS generator, wherein an output signal (ss_div) of the PRBS generator is feedable to the sample rate converter and to a delay element, wherein an output signal (ss_div_del) of the delay element is feedable to a frequency synthesizer, wherein the frequency synthesizer is clockable by a reference clock (clk_ref) and wherein an output signal (clk_ss) of the frequency synthesizer is feedable to a clock input of the sample rate converter and to a clock input of the digital-to-analog converting unit.
Claims19
Control unit for a transmission system, comprising:
- a sample rate converter, which is coupled to a digital-to-analog converting unit, wherein digital input data are feedable to the sample rate converter;
- and
- a PRBS generator, wherein an output signal of the PRBS generator is feedable to the sample rate converter and to a delay element, wherein an output signal of the delay element is feedable to a frequency synthesizer, wherein the frequency synthesizer is clockable by a reference clock and wherein an output signal of the frequency synthesizer is feedable to a clock input of the sample rate converter and to a clock input of the digital-to-analog converting unit.
Control unit for a transmission system, comprising:
- a sample rate converter, which is coupled to a digital-to-analog converting unit, wherein digital input data are feedable to the sample rate converter;
- and
- a PRBS generator, wherein an output signal of the PRBS generator is feedable to the sample rate converter and to a delay element, wherein an output signal of the delay element is feedable to a frequency synthesizer, wherein the frequency synthesizer is clockable by a reference clock and wherein an output signal of the frequency synthesizer is feedable to a clock input of the sample rate converter and to a clock input of the digital-to-analog converting unit, wherein the control unit is adapted to spread DAC-images of the digital-to-analog converting unit with reduced images power spectral density over a defined frequency range to avoid to spread a fundamental of the digital-to-analog converting unit.
Method of operation a control unit for a transmission system, comprising the steps:
- feeding of digital input data to a sample-rate converter;
- feeding of an output signal of the PRBS generator to the sampling rate converter and to a delay unit,
- feeding an output signal of the delay unit to a frequency synthesizer, wherein the frequency synthesizer is clockable by a reference clock;
- and
- feeding of an output signal of the frequency synthesizer to a clock input of the sample-rate converter and to a clock input of a digital-to-analog converting unit, wherein the digital-to-analog converting unit is adapted to convert the digital input data into analog output data.
Dependencies are inferred from the claim text.