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:
Jun. 02, 1981
Filed:
Jul. 05, 1979
Arthur J Leidich, Flemington, NJ (US);
RCA Corporation, New York, NY (US);
Abstract
An amplifier including two long-tailed-pair configurations in cascade: the first including a pair of bipolar transistors having input signals coupled to their respective bases, their emitters connected to a source of quiescent operating current, and their collectors connected to respective constant current generator loads; and the second including a pair of field-effect transistors having gate electrodes coupled to receive signals from the respective collectors of the first and second bipolar transistors, their source electrodes connected to a source of quiescent operating current, and their drain electrodes connected to subsequent circuit means for deriving an output from at least one of them. By this arrangement substantially the maximum available voltage gain is obtained from the first long-tailed pair. The amplifier may be used as the input circuitry of an operational amplifier, for example, and is suitable for monolithic construction.