公开(公告)号：US09204215B2

公开(公告)日：2015-12-01

申请号：US14136484

申请日：2013-12-20

Applicant: ST-Ericsson SA

Inventor： Christian Fraisse ,  Angelo Nagari

IPC: H04B15/00 ,  H04R3/00 ,  H03F3/217 ,  H03F3/45 ,  H03M3/00

CPC classification number: H04R3/00 ,  H03F3/2175 ,  H03F3/45968 ,  H03F2200/331 ,  H03F2200/375 ,  H03M3/384 ,  H03M3/50

Abstract: There is described Audio driver circuit comprising a main, 1-bit digital-to-analog converter, adapted to receive a 1-bit oversampled digital audio signal. Thanks to an auxiliary digital-to-analog converter which converts into the analog domain a digital offset compensation value stored in e.g. an OTP memory register 34, and to a summing and filtering arrangement, it is possible to reduce the offset cancellation granularity in order to compensate for the offset of the main digital-to-analog converter in the output signal.

Abstract translation: 描述了音频驱动器电路，其包括适用于接收1位过采样数字音频信号的主1位数模转换器。 由于辅助数模转换器，其转换成模拟域，数字偏移补偿值存储在例如数据位。 OTP存储器寄存器34，并且对于求和和滤波装置，可以减小偏移消除粒度，以便补偿主数模转换器在输出信号中的偏移。