Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1975-08-29
1977-01-04
Zazworsky, John
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307235R, 307261, 321 8R, 324120, 328150, H02M 700, H03K 500
Patent
active
040016978
ABSTRACT:
A highly linear AC to DC conversion system comprises a variable gain amplifier via which an AC signal to be converted is applied to an AC/DC converter. The output of the AC/DC converter is compared with a reference level and a control signal dependent on the difference therebetween adjusts the gain of the variable gain amplifier so as to reduce the difference. The output of the AC/DC converter is also applied to one input of a comparator, whose DC output is applied via the variable gain amplifier to the other input of the comparator. The variable gain amplifier has exactly the same gain for both AC and DC signals. It can then be shown that the DC output signal produced by the comparator is very accurately linearly related to the magnitude of the AC input signal.
REFERENCES:
patent: 3571706 (1971-03-01), Bjor
patent: 3652945 (1972-03-01), Nakane et al.
patent: 3723845 (1973-03-01), Duckworth
Metcalf Eric
Withers Paul Owen
McMahon K.
Sherman William R.
The Solartron Electronic Group Limited
Zazworsky John
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