The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 28, 1993
Filed:
Dec. 11, 1991
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An amplifier circuit of a symmetrical type is implemented with load transistors 1, 3, 5, 6 and input transistors 2, 4. Load transistors 1, 5 and input transistor 2 constitute a first inverter, and load transistors 3, 6 and input transistor 4 constitute a second inverter. A change in the output potential of each inverter is transmitted to a load transistor of the other inverter and increases the fluctuation of the potential of an output signal. A transistor 9 or 10 for current control is arranged between an input transistor and ground or between a load transistor and a power supply. The transistor 9 or 10 for current control interrupts through current when operation of the amplifier circuit is unnecessary and enhances the gain when the amplifier circuit is on operation. The gain is enhanced by setting the conductance of the load transistor and the conductance of the input transistor on predetermined conditions. Furthermore, an offset voltage caused in each amplifier circuit is canceled out by connecting two sets of symmetrical-type amplifier circuits.