US 7,321,262 B2
Power conversion system
Karsten Nielsen, Helsingor (Denmark); and Lars Michael Fenger, Glostrup (Denmark)
Assigned to Bang & Olufsen Icepower A/S, Lyngby (Denmark)
Appl. No. 10/570,324
PCT Filed Oct. 07, 2004, PCT No. PCT/IB2004/003267
§ 371(c)(1), (2), (4) Date Sep. 29, 2006,
PCT Pub. No. WO2005/036731, PCT Pub. Date Apr. 21, 2005.
Claims priority of application No. 0302681 (SE), filed on Oct. 09, 2003.
Prior Publication US 2007/0109044 A1, May 17, 2007
Int. Cl. H03F 3/38 (2006.01)
U.S. Cl. 330—10  [330/251; 330/207 A] 15 Claims
OG exemplary drawing
 
1. A power conversion system comprising:
at least one Pulse Modulated Amplifier (PMA) (1), including a pulse modulator for generating a pulse modulated signal (vpulse) based on a reference input (vi), a switching power stage arranged to amplify the pulse modulated signal, and a control system arranged to compensate for power supply voltage variations, and
a voltage supply providing a drive voltage (Vs, Vd) to each amplifier,
wherein
said voltage supply is provided with said input reference (vi), and arranged to provide a first drive voltage component (Vd) tracking an amplified absolute value of the input reference (vi).