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A gain and bandwidth enhanced transimpedance preamplifier for Fourier-transform ion cyclotron resonance mass spectrometry
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10.1063/1.3660778
/content/aip/journal/rsi/82/12/10.1063/1.3660778
http://aip.metastore.ingenta.com/content/aip/journal/rsi/82/12/10.1063/1.3660778
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Gain and noise distribution in a three stage amplifier system.

Image of FIG. 2.
FIG. 2.

Two types of preamplifier system schemes. The ideal current source I represents the signal from the ICR cell. The capacitor C is the combination of the parasitic capacitance of the cell and cabling. (a) A unity gain operational amplifier with an input resistor R to convert current signal into voltage. (b) A transimpedance amplifier with a feedback resistor R.

Image of FIG. 3.
FIG. 3.

Preamplifier circuit. (a) Schematic of the transimpedance preamplifier. (b) Single layer printed circuit board (sized ∼65 × 60 mm) with components fully populated.

Image of FIG. 4.
FIG. 4.

Computer simulations of the preamplifier transimpedance. (a) AC analysis without the feedback capacitor C1 in Fig. 3(a). (b) AC analysis with 0.85 pF feedback capacitor.

Image of FIG. 5.
FIG. 5.

AC analysis from the measured data. (a) Voltage gain of the main (AD8099) stage. (b) Transimpedance of the entire preamplifier system in three feedback conditions.

Image of FIG. 6.
FIG. 6.

Measured input current noise spectral density with 18 kΩ transimpedance.

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/content/aip/journal/rsi/82/12/10.1063/1.3660778
2011-12-09
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: A gain and bandwidth enhanced transimpedance preamplifier for Fourier-transform ion cyclotron resonance mass spectrometry
http://aip.metastore.ingenta.com/content/aip/journal/rsi/82/12/10.1063/1.3660778
10.1063/1.3660778
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