公开(公告)号：US5355134A

公开(公告)日：1994-10-11

申请号：US801545

申请日：1991-12-02

申请人： Nobuyuki Kasuga ,  Akinori Maeda

发明人： Nobuyuki Kasuga ,  Akinori Maeda

IPC分类号： H03M1/08 ,  H03M1/66

CPC分类号： H03M1/66

摘要： The present invention provides a digital to analog converter circuit comprising a digital to analog converter portion for accepting digital inputs indicative of a signal level and for producing an analog output indicative of a difference in signal level between one digital input and a previous digital input. An integrator is coupled to the digital to analog converter portion for integrating the analog output thereby producing a substantially smooth waveform. The digital to analog converter portion may comprise a plurality of current source type digital to analog converters having a common output terminal and the integrator may comprise an integrating capacitor. In such an embodiment the output from the common output terminal is indicative of a signal level difference determined by at least two of the digital inputs.

摘要翻译： 本发明提供了一种数模转换器电路，其包括数模转换器部分，用于接受指示信号电平的数字输入，并产生指示一个数字输入和先前数字输入之间的信号电平差的模拟输出。 积分器耦合到数模转换器部分，用于对模拟输出进行积分，从而产生基本平滑的波形。 数模转换器部分可以包括具有公共输出端的多个电流源型数模转换器，并且积分器可以包括积分电容器。 在这样的实施例中，公共输出端的输出指示由至少两个数字输入确定的信号电平差。