Abstract:
An apparatus configured for built in self test (BIST) jitter measurement is described. The apparatus includes a time-to-voltage converter. The time-to-voltage converter generates a voltage signal proportional to timing jitter present in a clock/data signal input. The apparatus also includes feedback circuitry for the time-to-voltage converter. The feedback circuitry provides a ramp slope for the time-to-voltage converter. The apparatus further includes a calibration controller. The calibration controller provides control signals to the time-to-voltage converter for process-independent calibration. The apparatus also includes a sample-and-hold (S/H) circuit. The S/H circuit provides a set bias voltage to the time-to-voltage converter once calibration is complete.
Abstract:
An apparatus configured for built in self test (BiST) of analog-to-digital convertors (ADCs) is described. The apparatus includes an ADC to be tested. The apparatus includes a ramp generator. The ramp generator provides a voltage ramp to the ADC. The apparatus further includes feedback circuitry for the ramp generator. The feedback circuitry maintains a constant ramp slope for the ramp generator. The apparatus includes an interval counter. The interval counter provides a timing reference.
Abstract:
An apparatus configured for built in self test (BiST) of analog-to-digital convertors (ADCs) is described. The apparatus includes an ADC to be tested. The apparatus includes a ramp generator. The ramp generator provides a voltage ramp to the ADC. The apparatus further includes feedback circuitry for the ramp generator. The feedback circuitry maintains a constant ramp slope for the ramp generator. The apparatus includes an interval counter. The interval counter provides a timing reference.