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:
Jul. 21, 1987
Filed:
Jul. 30, 1985
Gerald L Somer, Sebastopol, CA (US);
AMP Incorporated, Harrisburg, PA (US);
Abstract
An improved transmitter circuit for rf modems usable for communication in local area computer networks is provided. The transmitter circuit includes a digital/analog conversion circuit for generating a frequency modulated carrier from an input data signal, and a switched linear amplifier for amplifying and controlling the frequency modulated analog signal under the direction of the LAN protocol. The conversion circuit includes a time balanced compensated switching circuit for maintaining duty cycle integrity, while the switched linear amplifier provides on/off carrier control and level adjustment with minimum signal distortion including switching transients, and with minimum spurious signal leakage when off.