发明名称 |
Digital to analog converter circuit |
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.
|
申请公布号 |
US5355134(A) |
申请公布日期 |
1994.10.11 |
申请号 |
US19910801545 |
申请日期 |
1991.12.02 |
申请人 |
HEWLETT-PACKARD COMPANY |
发明人 |
KASUGA, NOBUYUKI;MAEDA, AKINORI |
分类号 |
H03M1/08;H03M1/66;(IPC1-7):H03M1/66 |
主分类号 |
H03M1/08 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|