Phase controllable multichannel signal generator having...

Details Phase controllable multichannel signal generator having... Phase controllable multichannel signal generator having...

2011-05-10

2011-05-10

Patel, Nitin C (Department: 2116)

Electrical computers and digital processing systems: support

Clock, pulse, or timing signal generation or analysis

C713S300000, C713S320000

Reexamination Certificate

active

07941686

ABSTRACT:
A signal generator can control phase relationship between output signals of the channels without stopping clocks provided to the channels to enable the circuit operation fast. First and second channels20and22have signal generation blocks10and12that have clock phase shift circuits26and28, memories, parallel to serial converters and DACs respectively. A phase comparator24compares data reading clocks from the signal generation blocks10and12to produce a phase difference signal wherein the data reading clocks are used to read waveform data from the memories within the signal generation blocks10and12. A CPU controls the clock phase shift circuits26and28according to the phase difference signal to shift phases of the clocks provided to the signal generation blocks10and12and then makes phase relationship between the output signals of the first and second channels20and22as desired.

REFERENCES:
patent: 5554945 (1996-09-01), Lee et al.
patent: 5668982 (1997-09-01), Davis
patent: 6111445 (2000-08-01), Zerbe et al.
patent: 6351508 (2002-02-01), Shishkoff et al.
patent: 6356224 (2002-03-01), Wohlfarth

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