| 摘要 |
PURPOSE:To secuer a high P-P level of the output signal exceeding the DC power voltage for the amplifying device using n-units of amplifiers by applying the amplificatioh output of the preceding step to the power source of the following step. CONSTITUTION:The power voltage of, for example, 12V is supplied directly to power application terminal 1b of 1st amplifier 1 and to power application terminal 2b of 2nd amplifier 2 via diode 9 respectively. Now on case the sine wave signal higher than the saturation input level of amplifier 1 is supplied to amplifier 1 from signal source 3, the clip waveform signal featuring the maximum 12V and the minimum OV is delivered to output terminal 1c. With this first one waveform, capacitor 6 is charged up to 12V. With supply of the next clip waveform, junction 7 features the voltage of 24V. This clip waveform undergoes the half-wave rectification via diode 8 and smoothing via capacitor 10 to be applied to terminal 2b of amplifier 2. As a result, the output signal to be applied to the speaker from smplifier 2 features the P-P level of maximum 24V to supply voltage +12V. |
