Changes between Initial Version and Version 1 of PMT_Amplifier


Ignore:
Timestamp:
Nov 8, 2013, 10:17:54 AM (10 years ago)
Author:
Eric Hazen
Comment:

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  • PMT_Amplifier

    v1 v1  
     1This page describes a NIM PMT amplifier/fanout module designed by Dan Gastler.
     2It consists of a motherboard which can house two pre-amp modules.
     3Each pre-amp has two inputs (which are summed) and three outputs.
     4
     5There are two amplifier stages, which may be independently configured for gains
     6of 1, 2, 5, 10 by changing resistors on the PCB.  The output stage has a 50 ohm
     7series termination resistor, so when driving 50 ohm loads the output gain is
     8one half the amplifier gain.
     9
     10The Texas Instruments [http://ohm.bu.edu/~hazen/DataSheets/TI/ths3201.pdf THS3201]
     11Page 16 of the datasheet linked above has a table of recommended resistor values
     12for various gain configurations.
     13
     14
     15* NIM Motherboard
     16 * Schematic: [http://ohm.bu.edu/~hazen/PMT_Amp/MotherB.pdf pdf] • [http://ohm.bu.edu/~hazen/PMT_Amp/MotherB.sch sch]
     17 * ExpressPCB Layout: [http://ohm.bu.edu/~hazen/PMT_Amp/MotherB.pcb MotherB.pcb]
     18* Triple-output amplifier module
     19 * Schematic: [http://ohm.bu.edu/~hazen/PMT_Amp/MultiAmp2.pdf pdf] • [http://ohm.bu.edu/~hazen/PMT_Amp/MultiAmp2.sch sch]
     20 * ExpressPCB Layout: [http://ohm.bu.edu/~hazen/PMT_Amp/MultiAmp2.pcb MultiAmp2.pcb]
     21* Parts List
     22 * [http://ohm.bu.edu/~hazen/PMT_Amp/PartsLists.ods OpenOffice Format] • [http://ohm.bu.edu/~hazen/PMT_Amp/PartsLists.pdf PDF]
     23
     24
     25Lee Roberts has ordered 3 units with output gain of 2, 5 and 10.
     26There are two stages, each with 50 ohm series termination which attenuates the output 2X.
     27So, to get (2, 5, 10) at the output we propose that the input stage be 4X,
     28and the output stages be 2, 5, 10.
     29
     30
     31