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:
Jun. 02, 2015
Filed:
Oct. 18, 2011
Rossella Bassoli, Monza, IT;
Carlo Crippa, Merate, IT;
Rossella Bassoli, Monza, IT;
Carlo Crippa, Merate, IT;
ST-ERICSSON SA, Plan-les-Ouates, CH;
Abstract
The present disclosure generally relates to the field of digital Class-D amplifiers and more specifically to a technique for reducing output waveforms distortion of a digital class-D amplifier implementing a ternary modulation scheme. An apparatus embodiment comprises an enlarging component for enlarging at least one pulse of a first output waveform PWM_P_TERN' of the amplifierby a first enlarging pulse, wherein the at least one pulse of the first output waveform PWM_P_TERN′ is symmetrically enlarged by the first enlarging pulse with respect to the center position of the at least one pulse; and a pulses generating component for generating at least one first compensating pulse comp_pulse_p and for adding the generated at least one first compensating pulse comp_pulse_p on a second output waveform PWM_N_TERN′ of the amplifier, wherein the at least one first compensating pulse comp_pulse_p has substantially the same width P as the first enlarging pulse and is added on the second output waveform PWM_N_TERN′ at a position which corresponds to the center position of the at least one pulse of the first output waveform PWM_P_TERN′.