-
公开(公告)号：EP2041866B1
公开(公告)日：2018-12-26
申请号：EP07789880.7
申请日：2007-07-04
Applicant: NXP B.V.
Inventor： DOOPER, Lutsen , BERKHOUT, Marco
CPC classification number: H03F3/217 , H03F2200/345 , H03F2200/351 , H03F2200/66 , H03F2200/78 , H03G11/008
Abstract: A class D amplifier (1) comprises an input unit (11) for receiving a digital input signal (Vin), a pulse shaping unit (12) for producing pulse shaped signals in dependence of the input signal (Vin), a comparator unit (13) for comparing the pulse shaped signals and producing a comparator signal, a driver unit (14) for producing driver signals in dependence of the comparator signal, a switching output unit (15) for producing a pulse width modulated output signal (Vout) in dependence of the driver signals, and a feedback unit (16) for feeding the output signal (Vout) back to the pulse shaping unit (12). The input unit (11) comprises a clipping control unit (10) for controlling the duty cycle of the pulse width modulated output signal (Vout).
-
公开(公告)号：EP1792401B1
公开(公告)日：2011-08-10
申请号：EP05799531.8
申请日：2005-09-09
Applicant: NXP B.V.
Inventor： NUIJTEN, Petrus, A., C., M. , DOOPER, Lutsen
CPC classification number: H03M3/366 , H03M1/0614 , H03M1/822 , H03M3/432 , H04B14/026
Abstract: An arrangement for pulse-width modulating an analog or digital input signal is provided. The non-linear distortion generated in the pulse-width modulator is precompensated by applying a signal with reversed error to the pulse-width modulator. The signal with reversed error is generated by a further pulse-width modulator that receives the input signal and whose output signal is subtracted from twice the input signal. The arrangement may e.g. be used to drive class D audio amplifiers.
-
公开(公告)号：EP2041866A1
公开(公告)日：2009-04-01
申请号：EP07789880.7
申请日：2007-07-04
Applicant: NXP B.V.
Inventor： DOOPER, Lutsen , BERKHOUT, Marco
CPC classification number: H03F3/217 , H03F2200/345 , H03F2200/351 , H03F2200/66 , H03F2200/78 , H03G11/008
Abstract: A class D amplifier (1) comprises an input unit (11) for receiving a digital input signal (Vin), a pulse shaping unit (12) for producing pulse shaped signals in dependence of the input signal (Vin), a comparator unit (13) for comparing the pulse shaped signals and producing a comparator signal, a driver unit (14) for producing driver signals in dependence of the comparator signal, a switching output unit (15) for producing a pulse width modulated output signal (Vout) in dependence of the driver signals, and a feedback unit (16) for feeding the output signal (Vout) back to the pulse shaping unit (12). The input unit (11) comprises a clipping control unit (10) for controlling the duty cycle of the pulse width modulated output signal (Vout).
-
-
Search Results
3
records
(took 0.008 seconds)
