| 摘要 |
PURPOSE:To prevent the decrease in the dynamic range with a simple constitution, by selecting the coefficient of split of capacitor forming BBD so that the specified conditions can be satisfied and the DC level of the 1st and 2nd BBDs connected each other is made in agreement. CONSTITUTION:Capacitors C0' ,C0'', C1', C1'', C4', C4'', C5', C5''... forming BBDa split with coefficients a0, a1, a4, a5...' and the capacitors Cb0' and Cb0'' of BBDb connected to BBDa via the connection circuit 9 are split with the coefficient b. When the coefficients a0...'b are selected so that the conditions of equation I can be satisfied, the DC level on and after the capacitor Cb2 of BBDb to which the output of BBDa is fed is corrected and the DC level of BDDa and BBDb is in agreement. Thus, with a simple constitution, the decrease in the dynamic range can be prevented and no signal deterioration like waveform distortion can not be generated. |
