公开(公告)号：US20020180546A1

公开(公告)日：2002-12-05

申请号：US10126494

申请日：2002-04-19

Applicant: STMicroelectronics S.A.

Inventor： Vincent Onde

IPC: H03K007/08

CPC classification number: G06F1/025 ,  H02M7/53873 ,  H03K7/08

Abstract: A pulse-width-modulated signal is generated out of a sampled reference signal. The least significant bits of a sample of the reference signal are stored in a comparison register. At the same time, a check is made in a test circuit to find out if the sample considered corresponds to a maximum amplitude of the reference signal. If this is the case, an overflow bit is given. The overflow bit and the least significant bits of the sample considered are then linked together to obtain a comparison word. The comparison word is compared with a number given by the counter to generate the pulse-width-modulated signal.

Abstract translation: 从采样的参考信号中产生脉宽调制信号。 参考信号的采样的最低有效位被存储在比较寄存器中。 同时，在测试电路中进行检查，以确定所考虑的样本是否对应于参考信号的最大幅度。 如果是这种情况，则给出溢出位。 然后将考虑的样本的溢出位和最低有效位链接在一起以获得比较字。 将比较字与由计数器给出的数字进行比较，以产生脉宽调制信号。