| 摘要 |
<p>A reference frequency of 4224 MHz is 1/2 frequency divided to obtain a sampling frequency of 2112 MHz, which is further sequentially 1/2 frequency divided, whereby 3-bit values outputted by the 1/2, 1/4 and 1/8 frequency divisions are decoded in accordance with a frequency selection. A set of nonlinear 2-bit D/A converters, which output amplitudes of (-1.7, -0.7, 0.7, 1.7), receive the decoded values to output complex amplitudes corresponding to eight phases on a complex plane, thereby producing a complex sine wave. This complex sine wave is used to perform a frequency switching. The center frequency of each of bands can be obtained without any phase or amplitude errors.</p> |
