| 摘要 |
<p>PURPOSE:To obtain well-balanced electric currents without making ballast resistance large, by making the value of emitter-ballast resistance compensate differences in resistance which are caused by lengths of lead wires. CONSTITUTION:Ballasting resistors 81 and 82 having small values are added to an emitter which is connected by a long lead wire 51 of a post-deflection transistor and the ballasting resistors 83 and 84 having large values are added to the emitter which is connected by a short lead wire 52. Differences in resistance due to length of lead wires which are used for connecting each emitter region and emitter terminal are thus offsetted by resistance values of the ballasting resistors which are added to each emitter. Then, amounts of resistance between a plurality of emitter regions and emitter terminals become equal and then, electric currents which flow in each emitter become uniform and the resultant safety operation regions expand.</p> |
