| 摘要 |
<p>The bandwidth of a digital input signal 200 is doubled by an upsampler 204 and interpolation filter 208, which feeds a pair of time-interleaved clocked DACs 214. The two DAC outputsare multiplied with a mixing clock 250 in the analogue domain, and then summed 270. Alternatively, the mixing may be performed in the digital domain before the DAC units (figure 10). The interpolation and mixing processes increase the bandwidth, and the time-interleaved DAC (TIDAC) technique reduces the amplitude of unwanted image frequency signals. The DAC may be used in an RF transmitter.</p> |
