| 摘要 |
This invention relates to a CMOS prescaler device for frequency dividing a high frequency signal, said device having two operating modes providing two different divisional ratios and comprising: a first fixed division ratio divider having a single ended input terminal; a phase differentiator having an input connected to said first fixed division ratio divider; a phase switch connected to said phase differentiator for receiving a two phase differentiated output signals therefrom; a second fixed division ratio divider connected to said phase switch; a phase switch controller connected to a second fixed division ratio divider, said phase switch controller comprising a mode select input, and being connected to the phase switch for controlling said switching between the two phase differentiated output signals. |
