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:
Feb. 19, 1991
Filed:
May. 22, 1989
Ward S Titus, Cambridge, MA (US);
Manfred J Schindler, Newton, MA (US);
Raytheon Company, Lexington, MA (US);
Abstract
A double balun circuit is provided by connecting two pairs of circut types. The first circuit, a distributed divider circuit, includes first and second pluralities of field effect transistors, a common input transmission line, and a first and second output transmission lines. The common input transmission line is disposed to successively couple the input electrodes of each transistor of both the first and second pluralities of transistors. The output lines are disposed to successively couple the output electrodes of the respective ones of the plurities of transistors. Each output transmission line is coupled to one of the pair of output terminals of the circuit. A pair of inverter circuits comprised of an input transmission line, a plurality of field effect transistors, and an output transmission line having input and output electrodes successively coupled by respective input and output transmission line networks are coupled between the output electrodes of each one of a pair of divider circuits, such that an input electrode at the input side of the inverter circuit is coupled to one of the outputs of the divider circuit, whereas an input terminal coupled to the output side of the inverter is coupled to the output of the second one of the divider circuits. This particular arrangement provides an active double balun which may be used in a double baluns mixer.