Provide programmable amplifiers and filters to form a data-acquisition system with the high speed 12-bit ADC RB8905.
Module RB9005 is a 4-channel programmable amplifier-filter module.
The module's front-panel looks as follows.
+----------------------+
| Programable |
| Differential Amp. |
| +input1 input3 |
| (o) (o) |
| |
| -input1 input4 |
| (o) (o) |
| |
| +input2 ouput |
| (o) (o) |
| clock |
| -input2 in o1 o2 |
| (o) (o)(o)(o) |
| |
| RULBUS |
+----------------------+
It has two differential programmable amplifiers followed by a programmable filter, two unbalanced input (single-ended) programmable amplifiers and an ouput multiplexer to present one, two, three or all four inputs in sequence.
1-1-1-1 · 2-1-2-1 · 3-2-1-3 · 4-3-2-1
Further the module has a clock input and two clock outputs that can be programmed to duplicate the clock input or to follow an alternating sequence so that out1 presents a clock signal for the odd channels and out2 presents a clock signal for the even channels in the selected channel sequence. (Apparently this is not very useful for the 3-2-1-3 sequence where channel 3 appears at odd and even positions in the sequence.)
Amplifiers Low Pass Filters Multiplexer
_ .------------.
in1+ o---| = _ .------. | |
|G1 _>--------------| LPF1 |-------------| Ch1 |
in1- o---|_= `------' | |
| | | |
| _ | | |
in2+ o--------| = _ | .------. | |
| |G2 _>---------------| LPF2 |-------| Ch2 |---o output
in2- o--------|_= | `------' | |
| | | | | |
| | _ | | | |
| | | = _ | | | |
in3+ o-------------|G3 _>-------------------------| Ch3 |
| | |_= | | | .----| Clock
| | | | | | | |
| | | _ | | | | |-<-o input
| | | | = _ | | | | |
in4+ o------------------|G4 _>--------------------| Ch4 | |->-o out1
| | | |_= | | |-------' |
| | | | | | | |->-o out2
| | | | | | `------------'
| | | | | | | | |
^ ^ ^ ^ ^ ^ ^ | ^
G1 G2 G3 G4 F1 F2 Channel ^ doClockSequence
doChannnelsequence
\_________________ software control ______________________/
The following table shows the module's gain and low-pass filter characteristics.
Channel | Gain F-LowPass [kHz] programmable
--------+------------------------------------------------------
1, 2 | 10, 20, 40, 80 >= 1000 (no filter)
| 100, 200, 400, 800 100 yes
| 1000, 2000, 4000, 8000 10 yes
| 10000, 20000, 40000, 80000 1 yes
| 0.1 yes
|
3, 4 | 1 3000 no
| 10 : no
| 100 : no
| 1000 312 no
Classes | |
| class | RB9005_amplifier |
| . More... | |