| 摘要 |
PURPOSE:To take out the only signal with the narrower range specified by a signal with large amplitude. CONSTITUTION:The large amplitude signal applied to an input terminal 10 is applied to a diode bridge 16 through a buffer amplifier 15 so as to take out signals with the narrow up and down width specified by a variable voltage source 29. A differential amplifier 17 eliminates the dc level specified by the voltage source 29 so as to obtain the output on an output terminal 12. Thus the narrow voltage range signal can be obtained by specifying an arbitrary level of the large amplitude signal, and one part of the large amplitude signal is fully amplified for detail observation when it is used for an oscilloscope. |
