Coded data generation or conversion – Analog to or from digital conversion – Nonlinear
Reexamination Certificate
2006-05-02
2006-05-02
Williams, Howard L. (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Nonlinear
C702S069000, C324S612000
Reexamination Certificate
active
07038605
ABSTRACT:
A noise measuring unit24measures a noise power based on an output from a digitizer16and the amplification factor of a limiter amplifier12when an output from a device under test10is supplied for the digitizer16through the limiter amplifier12. Since the output from the device under test10is supplied through the limiter amplifier12, the noise component is sufficiently amplified, the carrier component saturates, and thus, the noise measuring unit24easily measures the noise power. At this time, the output frequency of the device under test10is not multiplied, and thus, it is not necessary to use a down converter or a spectrum analyzer, the C/N ratio can be measured at a high speed or with a simple constitution.
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Advantest Corporation
Lowe Hauptman & Berner LLP
Williams Howard L.
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