Analog multiplier signal processing

For a fast acquisition this technique is too slow, especially at low signal levels where long integration times are required to accumulate a significant count of the analog value. 

More recently analog to digital converters have been used in conjunction with a current-to-voltage converter. This arrangement produces much faster acquisition, the speed of which is limited mainly by the response of the current-to-voltage converter. 

At the sort of signal levels used by analog multipliers, the ion statistical noise is small compared to other noise sources and especially the ICP source. This means that fast analog data acquisition is likely to be noise limited by the ICP source noise. 

For the minimum noise on the measured data, integration in software can be used with a speed penalty. 

To provide protection from discharges, a pair of back to back diodes (D1 and D2) with a current limiting resistor (/fin) is usually connected in the input circuit. 

---

The electronics associated with electron multiplier detectors always include a high stabiiity power suppiy that provides the accelerating potential to create the elec-tronavalanche. Processing the output signal from the electron multiplier is accomplished in analog mode for high... 

---