| 摘要 |
PURPOSE:To secure the flatness property for the capacitive load even to the low frequency input via the broad-duration pulse, by supplying repetivively the narrow- duration pulse to the DC cut-off coupling element. CONSTITUTION:The serial circuit of a pair of switching TRQ1 and Q2 plus Q3 and Q4 is connected to DC power source VS. And then capacitive load PDP such as the gas discharge element or the like is connected to the joint of TRQ1/Q2 and Q3/Q4, and pulse transformers T1-T4 functioning as the DC cut-off coupling elements are connected to the input side of the switching TR. When broad-duration pulses i1-i4 are supplied to load PDP, clock pulses i12 and i34 are applied to the pulse transformer via NAND gates G1-G4 in the form of a series of narrow-duration pulses and within the time corresponding to the pulse duration. As a result, the occurrence can be eliminated for the sag at the flat area when the broad-duration pulse is supplied. |
