Title:
METHOD FOR MEASURING VECTOR VOLTAGE RATIO
Document Type and Number:
Japanese Patent JP3171466
Kind Code:
B2
Abstract:
PURPOSE: To measure a vector voltage ratio at a high speed by using one A/D converter only.
CONSTITUTION: By supplying sine wave signals to arbitrary two terminals of a DUT 2, the voltage Vpot between the two terminals and converted voltage Vcur which is obtained by converting the current value flowing between the two terminals into a voltage value are outputted to an A/D converter 7 through a switch 4 which operates at the timing shorter than 1/4 of the period of the sine wave signals (shorter than 90° period when the period of the sine wave signals is 360°), for example, at the timing which is equal to 1/8 of the period of the sine wave signals. At the A/D converter 7, in addition, the voltages Vpot and Vcur are sampled at least once before the switch 4 makes switching operations and at a period which is equal to 1/4 of the measuring period. Then the vector voltages of the voltages Vpot and Vcur are found by performing digital signal processing on the sampling data about the voltage Vpot and Vcur by a well-known method.
Inventors:
Yasuaki Komatsu
Application Number:
JP30847391A
Publication Date:
May 28, 2001
Filing Date:
October 28, 1991
Export Citation:
Assignee:
Agilent Technologies, Inc.
International Classes:
G01R19/10; G01R27/02; (IPC1-7): G01R19/10; G01R27/02
Domestic Patent References:
| JP57106870A | ||||
| JP6015566A |
Attorney, Agent or Firm:
Kaoru Furuya (3 outside)
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