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:
Nov. 18, 1980
Filed:
Feb. 26, 1979
William H Mosley, Jr, St. Petersburg, FL (US);
Carl F Andren, Indialantic, FL (US);
E-Systems, Inc., Dallas, TX (US);
Abstract
A direct current responsive mixing circuit (10) includes three mixers (14, 16 & 18), each having one D.C. port and two A.C. ports. The D.C. ports are responsive to D.C. and A.C. signals, while the A.C. ports are responsive only to A.C. signals. One mixer (14) has an A.C. port (24) receiving a pump signal and a D.C. port (28) receiving an I input signal. A second mixer (16) has an A.C. port (26) receiving the pump signal and a D.C. port (32) receiving a Q input signal. The remaining A.C. ports of the first two mixers (14 and 16) are connected to the two A.C. ports (36 and 38) of the third mixer (18). An output signal having a component corresponding to the product of the I and Q input signals is produced at the D.C. port (40) of the third mixer (18). In this construction, the mixing circuit 10 is responsive to A.C. and D.C. input signals and may produce a D.C. output signal component.