| 摘要 |
PURPOSE:To make the polarity of an output signal unified independently of the polarity of an input signal, by picking up signals having equal amplitude but opposite polarity from the collector and the emitter of a transistor TR and coupling both the signals via diodes of the same polarity. CONSTITUTION:An input signal at a terminal 221 is inputted to a TR205 via a capacitor 201, and outputs having equal amplitude but opposite polarity are picked up from the collector and the emitter. Further, the resistance value of resistors 204, 206 are equal. Both the signals are applied to a TR215 via diodes 209, 210 and capacitors 207, 208 respectively. When the input signal is positive, the diode 210 is conductive and when negative, the diode 209 is conductive. Since a positive signal is applied to the TR215 at all times, the signal at an output terminal 222 is always negative. |
