| 摘要 |
PURPOSE:To obtain different rated outputs by one DC amplifying device, by conducting switching operations of a DC power source unit according to the different rated output. CONSTITUTION:An AC power source PS is connected to the primary side of a transformer T, while a plurality of rectifiers RF1 and RF2 are provided on the secondary side with a tap altered in its position. The output of the rectifier is given to an amplifier PA via switching means TR1 and TR2. A current from the amplifier PA is detected by resistors DR1 and DR2 and fed back to a signal amplifier SA, where at the regulation of the current is conducted. When a rated output selecting switch is operated for selection at this time, the outputs of switching transistors TR1 and TR2 are impressed on the current amplifier PA, while the detecting resistor DR2 is applied intermediately, and thus a different rate output can be obtained. |
