Pulse shaping circuit
AssigneeThermo Fisher Scientific (Bremen) GmbH
InventorsEike Jasper, Ralf Seeba, Mariugenia Salas-Hellwinkel
Life of this patent
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Abstract
A pulse shaping circuit for a spectrometer comprises a circuit input terminal for receiving detector pulses from an analog ion detector, a flip-flop for receiving detector pulses from the circuit input terminal, a delay unit for receiving output pulses from the flip-flop and feeding delayed output pulses to a reset input terminal of said flip-flop, and a circuit output terminal for supplying the output pulses or the delayed output pulses to a counter. The duration of the output pulses and the minimum duration of the interval between the output pulses is determined by the delay unit. The pulse shaping circuit may comprise at least one Schmitt trigger.
Claims20
A pulse shaping circuit for a spectrometer, the circuit comprising:
- a circuit input terminal for receiving detector pulses from an analog ion detector;
- a flip-flop for receiving detector pulses from the circuit input terminal;
- a delay unit for receiving output pulses from the flip-flop and feeding delayed output pulses to a reset input terminal of said flip-flop, such that the duration of the output pulses and the minimum duration of the interval between the output pulses is determined by the delay unit;
- and
- a circuit output terminal for supplying the output pulses or the delayed output pulses to a counter.
A detector pulse processing unit, comprising:
- a pulse shaping circuit comprising:
- a circuit input terminal for receiving detector pulses from an analog ion detector;
- a flip-flop for receiving detector pulses from the circuit input terminal;
- a delay unit for receiving output pulses from the flip-flop and feeding delayed output pulses to a reset input terminal of said flip-flop, such that the duration of the output pulses and the minimum duration of the interval between the output pulses is determined by the delay unit;
- and
- a circuit output terminal for supplying the output pulses or the delayed output pulses to a counter;
- and
- a counter for counting shaped detector pulses received from the pulse shaping circuit.
A mass spectrometer comprising:
- an ion source;
- a mass filter configured to receive ions from the ion source;
- a detector unit for detecting ions transmitted through the mass filter;
- and
- a detector pulse processing unit configured to receive signal pulses or amplified signal pulses generated by the detector unit, comprising:
- a pulse shaping circuit comprising:
- a circuit input terminal for receiving detector pulses from an analog ion detector;
- a flip-flop for receiving detector pulses from the circuit input terminal;
- a delay unit for receiving output pulses from the flip-flop and feeding delayed output pulses to a reset input terminal of said flip-flop, such that the duration of the output pulses and the minimum duration of the interval between the output pulses is determined by the delay unit;
- and
- a circuit output terminal for supplying the output pulses or the delayed output pulses to a counter;
- and
- a counter for counting shaped detector pulses received from the pulse shaping circuit.
Dependencies are inferred from the claim text.