Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system
Reexamination Certificate
2007-11-27
2007-11-27
Barlow, John (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Electrical signal parameter measurement system
C714S014000
Reexamination Certificate
active
10536436
ABSTRACT:
It is possible to apply a correct power to a load even when the output impedance and a load impedance of a signal source are different from a characteristic impedance of a transmission line. The power applied to the load can be expressed by a measurement system error factor, a load coefficient X of the load, and an S parameter of the input signal R. Accordingly, a target input signal decision can decide a target value of the S parameter of the input signal R according to the power desired to be applied to the load, the measurement system error factor, and the load coefficient X of the load. Furthermore, an input signal level control section controls the input signal level so that the S parameter of the input signal R has this target value. This is performed by changing the amplification ratio of an amplification ratio variable amplifier. Thus, it is possible to apply a desired power to the load not depending on whether the impedance is matched or not.
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Haruta Masato
Nakayama Yoshikazu
Advantest Corporation
Barlow John
Greenblum & Bernstein P.L.C.
Le Toan M.
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