Test of E906 PreAmp Prototype

Da-Shung Su, Su-Yin Wang, Ting-Hua Chang, Wen-Chen Chang2010/01/28

Block Diagramhttp://www-hep.phys.sinica.edu.tw/E906/FrontPage?action=AttachFile&do=get&target=E906_PAD_ENG_Schematics_Rev3.pdf

Stage A

Stage B

Reference Voltage

Cadence® Allegro® PCB

ESD protection Stage A Stage B Comparator DC/DC converter

E906 PAD card PCB layout design, Rev 1.0

Dimension4.

6 cm

10 c

m

1 cm

16 cm

Test of PreAmp Card(one-channel only)

signal input

DC Power supply

ECL output from comparator

Input Signal from Function Generator

Test Platform

Amplified (Small) Signal at Stage A

Input signal

Amplified signal

ECL differentialoutput

Injection charge=2.5A

Gain=30mV/2.5A=12k

Amplified (Small) Signal at Stage A

Input signal

Amplified signal

ECL differentialoutput

Injection charge=2.5A

Gain=30mV/2.5A=12k

Amplified (Small) Signal at Stage B

Input signal

Amplified signal

ECL differentialoutput

Injection charge=2.5A

Gain=200mV/2.5A*2=160k

Amplified (Small) Signal at Stage B

Input signal

Amplified signal

ECL differentialoutput

Injection charge=2.5A

Gain=200mV/2.5A*2=160k

Amplified (Large) Signal at Stage B

Input signal

Amplified signal

ECL differentialoutput

Injection charge=7.5A

Gain=700mV/7.5A*2=180k

•Undershoot is intrinsic in the input signal.•A quick baseline return within 30ns.

Detection Efficiency for Small Signal

Comparator Output

Triggered by 2.4 MHz signal from function generator. Accumulated over 1 minute.

Uniform Performance for Differential ECL Output from Comparator