4. The RPC Front-End Electronics (FEE) t 1 t 2 FEE-DBOs (108 DBOs/sector x6) FEE-MBOs (16 MBOs/sector x6) Mechanical support board, providing power supply, test signal and threshold DAQs. Amplifying and timing discrimination board (QtoW algorithm).
5. FEE and DAQ system 4 MBOs/TRB 8 DBOs/MBO 4 cells/DBO 4 TRB/sector 2 LV/sector See M. Traxler talk Trigger ∑ Front-End MBO DBO RPC signals RPC signals RPC cells DC-DC converter Commercial power supply Low voltage system 5 3.3 -5 5V,-5V,3.3V 48V Ethernet TRB Data acquisition system
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7. TI OPA690 amp integrates the amplified signal (QtoW algorithm) PHILIPS BGM1013 amp (35.5 dB at 1 GHz) Protected by PHILIPS BAV199 2-diodes RPC cell One DBO channel: analog stage Analog stage Digital stage Amplified RPC signal Integrated signal
8. MAX9601 dual PECL discriminator: LE used for cut/shape the output pulse TI SN65LVDS100 PECL-LVDS converter PHILIPS BFT92 PNP wideband (5 GHz) transistor for multiplicity trigger sum One DBO channel: digital stage Analog stage Digital stage Discriminator output Latch Enable (LE) Latch Enable/ (LE/)
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11. FEE performances: time resolution Q=V max x e -t/R in C R in C>>t r Q=C x V σ t(FEE+TRB) <40 ps/ch ToF threshold=-20mV σ t(FEE) < 17 ps/ch (Q>90 fC)
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13. In-beam results QtoW spectrums for one cell ToF threshold=-50 mV σ t =76 ps 3σ tails=2.2%