DPCM circuit

例句：

1. 1. The digital pulsecode modulation circuit is used to transmitdata over long distances.
   数字脉冲编码调制电路用于在长距离上传输数据。
2. 2.The DPC circuit was designed to improvethe signal-to-noise ratio ofthe communication system.
   DPC电路被设计用来提高通信系统的信噪比。
3. 3. The engineers were able to successfully implement the DPC circuit in the new device.
   工程师们成功地在新型设备中实现了DPC电路。