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US 4,000,473 AGranted
Isolation amplifier
AssigneeShoei Electric Co., Ltd.
InventorsMasaru Saito, Shigemitsu Taguchi
Life of this patent
Estimating the term…
Abstract
Disclosed is an isolation amplifier, wherein a DC input signal is applied to the primary winding of a saturable reactor, the secondary winding of which is coupled with an oscillating circuit so as to supply the secondary circuit with a high-frequency current, and then the current flowing through the secondary winding is applied to a feed-back type low-pass filter, with which an output signal proportional to the DC input signal is extracted from the current flowing through the secondary winding.
Claims4
An isolation amplifier circuit comprising:
- a. a saturable reactor having a single core wound with a primary, secondary and a control winding therearound, said primary winding being connected to a terminal means for receiving a DC input signal, and said secondary and control windings being connected in series,
- b. a circuit means connected to one end of said control winding to form a high-frequency oscillator circuit with said secondary and control winding for supplying said secondary winding with a high-frequency current, and
- c. a feedback current input type low-pass filter connected to the free end of said secondary winding.
Dependencies are inferred from the claim text.