Analog multiplier error corrector, notably for precision wattmet

Details Analog multiplier error corrector, notably for precision wattmet Analog multiplier error corrector, notably for precision wattmet

1977-02-07

1978-10-03

Ruggiero, Joseph F.

Boots, shoes, and leggings

307229, 328160, 324142, 364483, 364862, G06G 7161, G01R 1132

Patent

active

041187873

ABSTRACT:
An error correcting device for a multiplier of the time-division multiplication type comprising a modulator, a switch and a filter. Another switch is responsive to a time-base delivering periodically a zero signal to the modulator; a circuit memorizes and detects the difference between the product xy vitiated by switching and shifting errors and the errors themselves. The memories are of the capacitor and amplifier type, and the subtraction is obtained through the opposite of the voltages of said capacitors. This device is applicable more particularly to high-frequency, wide-range precision wattmeters adapted for d.c. calibration.

REFERENCES:
patent: 3466460 (1969-09-01), Connolly
patent: 3536904 (1970-10-01), Jordan, Jr. et al.
patent: 3610910 (1971-10-01), Udall
patent: 3712977 (1973-01-01), Rice, Jr.
patent: 3746851 (1973-07-01), Gilbert
patent: 3959724 (1976-05-01), Chana et al.

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