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:
Sep. 06, 2011
Filed:
Mar. 02, 2007
Karsten Nielsen, Helsingör, DK;
Petar Ljusev, Sønderborg, DK;
Karsten Nielsen, Helsingör, DK;
Petar Ljusev, Sønderborg, DK;
Bang & Olufsen Icepower A/S, GI., Lyngby, DK;
Abstract
A Hybrid feedback Controlled Oscillation Modulator (HCOM) is disclosed, having a 1feedback path from the output voltage of the switching stage and a second feedback path from the filter output, the two feedback paths being superposed to provide a weighted state feedback signal. The state feedback path signal is subtracted from the input signal to form an error signal, the error signal filtered by a forward path compensation block B(s), closing the loop by feeding the pulse modulator, the loop having a transfer function such that self-oscillation can be established in the closed loop system. In an example embodiment, the first feedback path has a low pass characteristic and the second feedback path lead characteristic, the first feedback path being weighted by a weighting factor β. Further embodiments include a pure passive realization without a forward path device and the application of 3feedback loops to enhance global amplifier performance.