Title:
D級オーディオアンプ用の多相パルス幅変調器
Document Type and Number:
Japanese Patent JP6437001
Kind Code:
B2
Abstract:
A multiphase pulse width modulator (PWM) producing N mutually phase shifted PWM signals, which is well-suited for class D audio amplifier applications. The multiphase PWM includes (a) N+1 (N ≧2) analog triangular waveform generators producing N+1 mutually phase shifted triangular waveforms, and (b) N+1 comparators each having a first input coupled to each of the N+1 triangular waveforms and a second input coupled to an audio signal to generate N+1 mutually phase shifted PWM phase signals. A crosspoint switch includes N+1 inputs coupled to the N+1 PWM phase signals, and N outputs to supply the N PWM signals. A crosspoint switch controller selectively connects each of the N+1 inputs to each of the N outputs for a duration of a cycle time in a time sequence to simultaneously generate the N PWM signals such that each signal has interleaved time segments of the N+1 PWM phase signals.
Inventors:
Alan Noguiras Nilsun
Miguel Hoyerbu
Miguel Hoyerbu
Application Number:
JP2016541877A
Publication Date:
December 12, 2018
Filing Date:
September 01, 2014
Export Citation:
Assignee:
Infineon Technologies Austria Akgen Gezelshaft
International Classes:
H03F3/217; H03K7/08
Domestic Patent References:
| JP2001127562A | ||||
| JP2010200290A | ||||
| JP2011061839A | ||||
| JP2005109590A | ||||
| JP2013541305A | ||||
| JP2004048333A |
Foreign References:
| US20120049930 |
Attorney, Agent or Firm:
Sonoda/Kobayashi Patent Business Corporation