| 摘要 |
<p>PURPOSE:To iminiaturize a circuit scale and to attain a high speed operation by installing an addition circuit which receives plural clocks inputted from plural digital lines, prevents direct currents and simply adds alternate currents. CONSTITUTION:For preventing the direct currents, an input clock V1, an input clock V2,... an input clock Vn are simply added by the addition circuit 1 through C1, C2,...Cn and R1, R2,...Rn, all of which have different values. When respective clocks are voltage outputs, they are respectively added in the addition circuit 1 through resistors. A synthesized wave output V0 which is thus obtained has a different phase but a same fundamental recurrent frequency. Thus, the clock being a fundamental frequency is extracted in a filter 2, and amplitude is made constant in an amplitude limitter 3, whereby it is used as a system clock.</p> |
