Constant Fraction Discrimi­nators

Electronic signal processing device, to mimic the mathematical operation of finding a maximum of a pulse by finding the zero of its slope. It is used to generate exact time stamps from wide pulses with changing signal amplitudes, but a constant rise time.

Stand-Alone CFDs

Constant Fraction Discriminator in stand-alone housing for processing of analogue pulses for readout of e.g. Channeltrons, MCP stacks etc. Device is available with up to 6 channels.

  • Input signal frequency (max.): 115MHz
  • Input amplitude range -50mV to -1.5V (positive input range on request)
  • Output jitter vs. input at fixed amplitude < 14ps
  • Typ. time walk < 30ps
  • Switchable between gated and ungated operation

NIM-Module CFDs

Constant Fraction Discriminator in 1/12NIM or 2/12NIM housing for processing of analogue pulses for readout of e.g. Channeltrons, MCP stacks etc. Device is available with up to 4 channels.

  • Input signal frequency (max.): 115MHz
  • Input amplitude range -50mV to -1.5V (positive input range on request)
  • Output jitter vs. input at fixed amplitude < 14ps
  • Typ. time walk < 30ps
  • Switchable between gated and ungated operation

Stand-Alone Preamplifiers CFD Combinations

Constant Fraction Discriminator with integrated Preamplifier in stand-alone compact RF-shielded housing or as 19” rack mount housing for processing of analogue pulses for readout of e.g. Channeltrons, MCP stacks etc. Device is available with up to 4 channels.

  • Input signal frequency (max.): 40MHz
  • Variable gain (typ.): 13dB to 30dB
  • Input signal: 2mV – 1V (depending on gain setting)
  • Polarity of input signal: negative or positive (switchable)
  • Typ. time walk < 30ps