1:20 Time Stretcher
1:20 Time Stretcher
2
40
800
T0A
T0B
SpecTrig Logic Module
Using two time stretchers STT100 stretch the coincidence signal at least  100 times. Measure width of the signal in STLM using internal 100 MHz clock. Using both edges of the clock it is possible to get SPLM time resolution of 5 ns.
Pros:
•Should work
•Occupies one input on the STLM
•If stretcher works according to specs then it should be possible to achieve resolution better than 2 cm
•
Cons:
•Need to build a simple (NIM?) board
STT100 Specifications:
Inputs and Outputs: 1 each, differential ECL.
External Clock Required for long base: 60 - 100 MHz.
Normal Stretch Ratio: 20:1.
Range: 0-32 us
LSB: 25 ps when used with a 500 ps LSB multi-hit TDC. Calibration method employs LeCroy propriety technique; patent applied for.
Operation Modes: Common Stop or Common Start.
Double pulse Resolution: < 800 ns with 61.5 MHz clock.
Packaging: Surface mount board, 1.5" x 3".
Power: +9 V, +5 V, -5 V, -2 V, -9 V; 2 W total
Proposal 1. Using time stretchers