Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1975-01-17
1976-11-16
Goldberg, Gerald
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307233A, 307246, 307271, 324 78J, 328140, H03B 304, H02M 700
Patent
active
039926605
ABSTRACT:
A frequency-current conversion circuit adapted to a speedometer installed in a vehicle for converting the rate of rotation of an engine to a current signal wherein a first capacitor is charged to a predetermined value during the half cycle of an input signal and, then, a second capacitor is charged with the electric charge stored in the first capacitor during the half cycle of the input signal following the half cycle where the first capacitor is charged. When a voltage across the first capacitor reaches a predetermined value, the second capacitor stops charging. The smoothed direct current signal from the second capacitor, if necessary amplified by a current amplifier, drives a load.
REFERENCES:
patent: 3535658 (1970-10-01), Webb
patent: 3575611 (1971-04-01), Reed
patent: 3584298 (1971-06-01), Kolblaz
patent: 3590379 (1971-06-01), Fellerman et al.
patent: 3628063 (1971-12-01), Tamari
patent: 3749938 (1973-07-01), Van Winkler
Kawashima Yoshichi
Masuda Hiroiku
Mitsueda Hisami
Goldberg Gerald
Nippondenso Co. Ltd.
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