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Application filed by Dft Microsystems IncfiledCriticalDft Microsystems Inc
Publication of TW200722773ApublicationCriticalpatent/TW200722773A/en
Digital Transmission Methods That Use Modulated Carrier Waves
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Abstract
A tester for testing high-speed serial transceiver circuitry. The tester includes a jitter generator that uses a rapidly varying phase-selecting signal to select between two or more differently phased clock signals to generate a phase-modulated signal. The phase-selecting signal is designed to contain low-and high-frequency components. The phase-modulated signal is input into a phase filter to filter unwanted high-frequency components. The filtered output of the phase filter is input into a data-transmit serializer to serialize a low-speed parallel word into a high-speed jittered test pattern for input into the transceiver circuitry.