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US 2006/0067431 A1Published application
Circuit and method for recovering a carrier
AssigneeTrident Microsystems (Far East) Ltd.
InventorIngo Steinbach
Life of this patent
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Abstract
The invention relates to recovering a carrier for a synchronous demodulator, that receives an input signal. A carrier is reconstructed for the provided input signal, and the input signal (in) and carrier (tr) are mixed to generate a mixed signal to be outputted (i, q), wherein a residual phase error of the mixed signal is corrected by a phase shift to provide a phase corrected output signal.
Claims12
Method for recovering a carrier for a synchronous demodulator (SD), comprising:
- mixing an input signal (in) and a carrier signal (tr) in order to generate a mixed signal that includes in-phase and quadrature signal components;
- phase correcting the mixed signal to correct a residual phase error of the mixed signal and provide a phase corrected mixed signal.
A circuit to effect carrier recovery of a reconstructed carrier for an input signal, comprising:
- a mixer to mix the input signal with the carrier to provide a mixed signal (i, q);
- a phase-locked loop to determine a control correction signal to control the carrier;
- and
- a phase shifter to correct a residual phase error of the mixed signal (i, q) to provide a phase corrected output signal.
1 more element
Dependencies are inferred from the claim text.