ISD4003语音录放电路 ISD4003是美国ISD公司继ISD3330系列之后最新推出的时限为8分钟的长时间语音录放电路。这种录放电路采用了多电平直接模拟量存储技术,将每个采样值直接存储在片内的快闪存储器中,因此能够非常真实、自然地再现语音、音乐、音调和效果声,避免了一般固体录音电路因量化和压缩造成的量化噪声和金属声。ISD4003系列的性能如附表所示。采样频率越 ISD4003 voice recording circuit ISD4003 is the United States ISD company following the ISD3330 series after the latest launch time limit of 8 minutes long voice recording circuit. This recording and playback circuit uses a multi-level direct analog storage technology, each sample directly stored in the on-chip flash memory, so very realistic and natural reproduction of voice, music, tone and sound effects, to avoid General solid-state recording circuit due to quantization and compression caused by quantization noise and metal sound. ISD4003 series of performance as shown in the schedule. The more sampling frequency