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:
Jun. 11, 2002
Filed:
Sep. 22, 1995
Paul D. Filliman, Indianapolis, IN (US);
Mark Francis Rumreich, Indianapolis, IN (US);
Thomson Licensing S.A., Boulogne, FR;
Abstract
A source ( ) provides an input signal (S ) to be phase shifted and a combining circuit ( ) concurrently combines first (A), second (B) and third (C) intermediate signals derived from the input signal (S ), and having differing phase shifts (0, −45, +135 deg), to form a phase shifted output signal (S ). A first amplitude controller ( ), responsive to a phase control signal (S ) supplied thereto, varies the amplitudes of the second (B) and third (C) intermediate signals in opposite directions ( ) for controlling the phase of the phase shifted output signal. Additionally, a further amplitude controller ( ) is provided for reducing a tendency for variations in the phase shift control signal (S ) to alter the amplitude of alternating current (FIG. ) and direct current (FIG. ) components of the phase shifted output signal (S ).