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. 16, 1982
Filed:
Jul. 23, 1980
Roger E Gerard, Chelmsford, GB;
The Marconi Company Limited, Chelmsford, GB;
Abstract
For many applications it is desirable that electronic amplifiers have good linearity (a typical such application is in the field of high frequency radio transmission). Various arrangements and designs have been employed to ensure that the desired linearity is attained, but some types of amplifier have proven rather difficult in this respect: such a type is the distributed amplifier, where the correction of amplification errors has proven particularly difficult because of the relatively large time delay (and thus signal phase difference) 'across' the amplifier. The present invention seeks to provide a distributed amplifier system allowing the easier correction of amplifier errors. Specifically, the invention provides an electronic amplification system incorporating a distributed amplifier, which system comprises comparison means (12,13) for comparing the shape of the input control signal with the shape of the final output signal, and for providing a difference signal indicative of any amplifier-induced distortion, correction signal generating means (V.sub.9) for forming in dependance upon the difference signal a correction signal, and combiner means (14) for combining the correction signal with the final output signal so as substantially to cancel the amplifier-induced distortion.