ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,481,302, issued on Nov. 25, was assigned to ABLIC Inc. (Nagano, Japan).
"Constant voltage circuit" was invented by Kosuke Takada (Nagano, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a constant voltage circuit with which a variation of an output voltage in response to a sudden change of a power supply voltage is small. The constant voltage circuit includes: an ED-type reference voltage circuit including at least two depletion mode transistors and an enhancement mode transistor which are connected in series; a depletion mode transistor connected in series between the power supply terminal and the ED-type reference voltage circuit; a f...