Transcript The status of amplifier circuit for HPD

The status of amplifier circuit for HPD
Student, Tokyo Metropolitan Univ. M1, Takayuki Seki
Advisor, KEK, Hirokazu Ikeda
・purpose and point
/designing of amplifier for HPD using IC
/shot noise power (main noise) ∝ Tm
/peaking time of ready-made goods are too long (Tm=1~2 [μs])
/ to reduce the noise ,we must design circuit with shorter peaking time
/ we have gotten Tm = 150 [ns] using T-Spice simulator
・detail
/ dynamic Range : 2000~20000 [e]
/ noise
: 250 [e]
/ threshold
: 600 [e]
/ S/N
: 8 (at 2000[e])
/ channel
: 18 [channel/chip]
/ gain
: 50 [mV/photon]
/ peaking time
: 150 [ns]
/ readout method : Serial Digital output
・characteristic
/ possible to change the gain (1~16 times)
/ using shift register, a signal is maintained (longest time 4 [μs])
/ a threshold can be adjusted (highest value 3.3 [V])
/ the variation between channels is suppressed by the offset circuit
/ and etc….
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Fig.4
a schedule
• 2002/09/02 meeting with DIGIAN Technology
• 2002/11/05 a deadline of IC design (include layout)
• 2003/02/07 delivery of IC chip
• 2003/02/07~ test of IC
・chip /produced by ROHM co.
/size
: 4.93×4.93 [m㎡]
/pin
: 111
/package : QFP144
/voltage : 3.3 [V]
/layer
: PolySi×2, metal×3