| 摘要 |
<p>PURPOSE:To prevent the instability of a clock reproducing operation caused by the noise component of the clock reproducing circuit to extract a timing component for identifying and reproducing a digital transmission line signal. CONSTITUTION:Two threshold values VH and VL are set corresponding to the direct current component of a signal binary coding a digital transmission line signal A, and the levels of these threshold values are compared with that of a sine wave output (a) from a tank circuit 3 by comparator circuits 6 and 7. These compared outputs (b) and (c) are defined as the set/reset inputs of an RS flip-flop 8, and an output (d) of this flip-flop 8 is defined as a regenerative clock.</p> |
