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:
May. 02, 2006
Filed:
Jan. 18, 2003
Tomasz Hanzlik, Wroclaw, PL;
Tomasz Hanzlik, Wroclaw, PL;
Advanced Digital Broadcast Polska Sp. z o.o., Zielona Gora, PL;
Advanced Digital Broadcast Ltd., Taipei, TW;
Abstract
In a class D electroacoustic amplifier () without feedback loop containing a supply voltage source (), an amplifier low-pass filter (), a power stage () controlled by a pulse width modulated signal, a saw-shaped voltage generator () and a comparator (), to one of which inputs an audio signal is sent, while its second input is connected to the adder () of the compensation circuit of supply voltage influence on the output audio signal, to which a voltage from a reference voltage source is sent, a low-pass filter () and a high-pass filter () are connected to the supply voltage source (), and the reference voltage source () is connected to an inverting circuit (), whose input is connected to the low-pass filter () output, while the high-pass filter () output and the output of the inverting circuit () are connected to a multiplier (), whose output is connected to the input of another multiplier (), whose second input is connected to the saw-shaped voltage generator (), and the multiplier () output is connected to one input of the adder () whose second input is connected to the saw-shaped voltage generator ().