Discriminators

Analog

Photo of Discriminators

The Discriminators family provides high-performance timing and threshold discrimination for detector and trigger systems, supporting both leading-edge and constant-fraction techniques. Designed for fast analog signals from scintillators, PMTs, semiconductor detectors, and other radiation sensors, these modules deliver precise timing extraction, low jitter, and reliable noise rejection across a wide dynamic range.

Available in NIM and VME formats, they offer multi-channel architectures with individually adjustable thresholds, programmable output widths, and flexible logic features such as veto, gate, OR, majority, and current-sum outputs. With options for high-rate operation, sub-nanosecond timing performance, and configurable operating modes, the family enables accurate trigger generation and timing measurements in complex experimental setups.

  • Leading-edge and constant-fraction discrimination for precise timing and triggering

  • Multi-channel modules with programmable thresholds, widths, and operating modes

  • Advanced logic features: veto, gate, OR, majority, and current-sum outputs

  • High sensitivity and low jitter for fast detector and high-rate applications

Discriminators Models

Grid Compare
N840

N840

  • Individually programmable thresholds

  • Selectable Updating/Non Updating mode

  • Programmable output width
N843

N843

  • High channel density

  • Individually programmable thresholds

  • Programmable output width
N842

N842

  • Individually programmable thresholds

  • Programmable output width

  • Programmable dead time
N844

N844

  • Individually programmable thresholds

  • Programmable output width

  • TEST and VETO inputs
V812

V812

  • Thresholds individually programmable via VME

  • Constant fraction for precise discrimination timing

  • ECL outputs with fan-out of two
N845

N845

  • Individually programmable thresholds

  • Programmable output width

  • TEST and VETO inputs
V895

V895

  • Thresholds individually programmable via VME

  • ECL outputs with fan-out of two

  • Selectable Updating/Non Updating mode
N605

N605

  • Four independent Constant Fraction Discriminators for fast detectors with sub-ns rise time

  • Independently adjustable discriminators parameters (T, W, Z)

  • Double pulse resolving time down to 4 ns
N841

N841

  • High channel density

  • Individually programmable thresholds

  • Selectable Updating/Non Updating mode
V814

V814

  • Thresholds individually programmable via VME

  • ECL outputs with fan-out of two

  • Non updating operation
Image
Name
Package
No. of Channels
Function
Updating
Min Input (mV)
Output Width (ns)
I/O Delay (ns)
Outputs
Input Bandwidth (MHz)
In Conn.
Out Conn.
N840

N840

NIM

Leading Edge

Selectable

-5

5 ÷ 40

10

2 + /1 NIM

140

LEMO

LEMO
N843

N843

NIM

Const. Fraction

No

-5

15 ÷ 245

n/a

2 + /1 NIM

n/a

LEMO

LEMO
N842

N842

NIM

Const. Fraction

No

-5

15 ÷ 245

n/a

2 + /1 NIM

n/a

LEMO

LEMO
N844

N844

NIM

Low Threshold

No

-3

5 ÷ 90

10

2 + /1 NIM

60

LEMO

LEMO
V812

V812

VME

Const. Fraction

No

-5

12 ÷ 206

n/a

2 ECL

n/a

LEMO

Std. Flat
N845

N845

NIM

Low Threshold

No

-3

5 ÷ 90

10

2 + /1 NIM

60

LEMO

LEMO
V895

V895

VME

Leading Edge

Selectable

-5

5 ÷ 40

10

2 ECL

140

LEMO

Std. Flat
N605

N605

NIM

Const. Fraction

Selectable

-20

2 ÷ 500

n/a

3 NIM

250

LEMO

LEMO
N841

N841

NIM

Leading Edge

Selectable

-5

5 ÷ 40

10

2 + /1 NIM

140

LEMO

LEMO
V814

V814

VME

Low Threshold

No

-1

6 ÷ 95

10

2 ECL

60

LEMO

Std. Flat