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:
Aug. 01, 2000
Filed:
Apr. 22, 1999
Walid Kamali, Duluth, GA (US);
Saleh R Al-Araji, Alpharetta, GA (US);
Scientific-Atlanta, Inc., Norcross, GA (US);
Abstract
An amplifier circuit (400) includes an input port (402) for receiving a signal and a first balun (404) for splitting the signal into first and second signals. First and second amplifiers (406, 408) are coupled to outputs of the first balun (404) for respectively amplifying the outputs of the first balun (404) to generate first and second amplified signals. Second and third baluns (410, 412) are coupled, respectively, to outputs of the first and second amplifiers (406, 408) for splitting, respectively, each of the first and second amplified signals into in-phase and out-of-phase components. The amplifier circuit (400) also includes third and fourth amplifiers (414, 416) coupled to outputs of the second balun (410) for respectively amplifying the outputs of the second balun (410) to generate third and fourth amplified signals and fifth and sixth amplifiers (418, 420) coupled to outputs of the third balun (412) for respectively amplifying the outputs of the third balun (412) to generate fifth and sixth amplified signals. A fourth balun (422) combines the third and fourth amplified signals into a first combined signal, and a fifth balun (424) combines the fifth and sixth amplified signals into a second combined signal. The amplifier circuit (400) further includes a combiner, such as an additional balun (326) or a summer (430), for combining the first and second combined signals to generate an amplifier output signal.