| 摘要 |
<p>The particle analysis equipment utilises a detector (15) formed from a membrane, a current source, a manometer, input and output contacts and means for liquid transport. The detector output is connected to an amplifier (16) and thereafter to a differentiator (18) which may be built up from a resistor and a capacitor. The differentiator output has a diode by-pass to earth which abbreviates the positive pulses, so that the trailing pulse flank signal proceeds to a threshold value circuit (22) with level controlled by a potentiometer (24). The final stages are an electronic switch (26) and an amplitude analyser (32). A direct connection (34) exists between the detector (15) and the analyser (32) so that the latter is responsive both to particle amplitude and its differential coefficient.</p> |
