METHOD AND APPARATUS FOR MEASURING SIGNAL-TO-QUANTIZATION-NOISE RATIO

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United States of America Patent

APP PUB NO 20170099063A1
SERIAL NO

15266458

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Abstract

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Apparatus for determining a signal-to-quantization-noise ratio of a quantization circuit includes a signal generator that generates an input test signal for input to the quantization circuit, circuitry for isolating, from output of the quantization circuit, a signal representing quantization noise, and circuitry for determining a ratio of the output of the quantization circuit to the signal representing quantization noise. The signal generator generates an analog test tone having a frequency, and the circuitry for isolating includes a notch filter filtering that frequency. Alternatively, the circuitry for isolating includes circuitry for generating a digital test signal, and a digital subtractor for subtracting the digital test signal from the output of the quantization circuit. According to another alternative, the circuitry for isolating includes a transformation circuit whose outputs represent a peak of the output of the quantization circuit and a noise floor of the output of the quantization circuit.

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Patent Owner(s)

Patent OwnerAddress
MARVELL INTERNATIONAL LTDCANON'S COURT 22 VICTORIA STREET HAMILTON HM12

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ahirwar, Vijay Bhopal, IN 21 25
Ganwani, Vijay Pune, IN 5 1
Lin, Yui Palo Alto, US 18 214
Narravula, Sridhar Cupertino, US 1 0
Srinivasa, Sudhir Campbell, US 157 2363
Zhang, Hongyuan Fremont, US 668 8504

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