Receiver
AssigneeDenso Corporation
InventorNobuaki Matsudaira
Life of this patent
Estimating the term…
Abstract
A receiver includes: an A/D converter that performs an analog digital conversion of an input signal; an equalizer that equalizes an output from the A/D converter, eliminates inter code interference and obtains a data output; a timing recovery part that generates a recovery clock from the data output of the equalizer; a detector that detects the timing when an input signal varies from a no-signal state and has reached a predetermined threshold; and an initial phase setting part that sets as the initial phase of the recovery clock by the timing recovery part, a timing when the predetermined time has elapsed after the timing detected by the detector.
Claims3
A receiver comprising:
- an A/D converter that performs an analog digital conversion to an input signal;
- an equalizer that equalizes an output of the A/D converter, eliminates an inter-code interference and obtains a data output;
- a timing recovery part that generates a recovery clock by using the data output of the equalizer;
- a detector that detects a timing when the input signal varies from a non-signal state and has reached a predetermined threshold;
- and
- an initial phase setting part that sets as an initial phase of the recovery clock from the timing recovery part, a timing when a predetermined time has elapsed after the timing detected by the detector, wherein:
- the timing recovery part includes a phase lock loop that outputs a reference clock and a divider that divides the reference clock of the phase lock loop;
- and
- when the recovery clock is generated, the phase lock loop outputs the reference clock, with the initial phase of the recovery clock set by the initial phase setting part as a start, the divider starts to divide the frequency of the reference clock, generates dual-phase clocks and generates the recovery clock corresponding to the dual-phase clocks, and wherein
- the detector includes a comparator arranged in parallel with the A/D converter;
- the detector detects the timing that has reached the threshold by the comparator and obtains a output signal;
- and
- the initial phase setting part includes a delay circuit that delays outputs the output signal to the timing recovery part with a delay of the output signal of the comparator for a predetermined time, and obtains the initial phase of the recovery clock.
Dependencies are inferred from the claim text.