Title:
【発明の名称】浮動電源を用いた出力段
Document Type and Number:
Japanese Patent JP2003510872
Kind Code:
A
Abstract:
A switching output stage for Class D amplifiers and the like utilizes a floating power supply providing a relative positive output voltage VP at a first line and a relative negative output voltage VM at a second line. Two switches are connected in parallel across the two lines. The first switch has a common to ground and switches between VP and VM, and the second switch has a common to a low pass output filter and switches between VP and VM. The input to the filter can take on three values, VP, VM, and 0. The input VP to the filter is achieved by switching the first switch to VM and the second switch to VP, and the input VM to the filter is achieved by switching the first switch to VP and the second switch to VM. The input 0 to the filter may be achieved by switching both the first switch and the second switch either to VP or to VM.
Inventors:
Mellanson, John Lawrence
Application Number:
JP2001525828A
Publication Date:
March 18, 2003
Filing Date:
September 21, 2000
Export Citation:
Assignee:
Shirasu Logic, Inc.
International Classes:
H02M7/537; H02M7/5387; H03F3/217; (IPC1-7): H03F3/217; H02M7/48; H02M7/537
Attorney, Agent or Firm:
Shusaku Yamamoto