利索-全球专利检索

  1. 登录
  2. 注册
发明授权
CN103347332B 信号处理方法及电路及带该电路的LED调光电路 有权

信号处理方法及电路及带该电路的LED调光电路
摘要：
本发明涉及电子领域，公开了一种信号处理方法及电路及带该电路的LED调光电路。方法包括：按照第一时钟信号的频率采样第一脉冲宽度调制信号，获取采样脉冲，自零开始计数第二时钟信号脉冲个数，直到当前累计脉冲个数与高电平采样脉冲个数相一致为止，将当前累计脉冲个数存储为第一脉冲个数，输出第一脉冲信号；自零开始计数第二时钟信号脉冲个数，直到当前累计脉冲个数与低电平采样脉冲个数相一致为止，将当前累计脉冲个数存储为第二脉冲个数，输出第二脉冲信号，根据第一脉冲信号以及第二脉冲信号，生成第二脉冲宽度调制信号。应用该技术方案有利于提高PMW信号的频率而保持其占空比不变，以及在调制频率较低的情况下实现电路的小型化集成。
摘要（英）：

In one embodiment, method of signal processing can include: (i) determining a high level sampling pulse amount by counting a number of pulses of a first clock signal during a high level portion of a period of a first PWM; (ii) generating a first pulse signal based on a second clock signal and the high level sampling pulse amount; (iii) determining a low level sampling pulse amount by counting a number of pulses of the first clock signal during a low level portion of the period of the first PWM signal; (iv) generating a second pulse signal based on the second clock signal and the low level sampling pulse amount; and (v) generating a second PWM signal based on the first and second pulse signals.

公开/授权文献
0/0