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Recent content by robismyname
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manipulate voltage output in transimpedance amp circuit
When a resistor is in parallel with C128 how does the capacitor contribute to the voltage across the resistor?- robismyname
- Post #7
- Forum: General Electronics Discussion
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manipulate voltage output in transimpedance amp circuit
Does any of your answers change if the input is is coming in from the left side J25 pos 3?The input from J25 pos 3 is current. The current goes to pin 2. The off page connector called SER_IN is really the input signal going to the FPGA. SER_IN is what is coming out of the AMP. I didnt...- robismyname
- Post #5
- Forum: General Electronics Discussion
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manipulate voltage output in transimpedance amp circuit
The input is is coming in from the left side J25 pos 3. Th input is current. The current goes to pin 2. The off page connector called SER_IN is really the input signal going to the FPGA. SER_IN is what is coming out of the AMP. I didnt measure the current coming in to pin 2 but I know the...- robismyname
- Post #4
- Forum: General Electronics Discussion
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manipulate voltage output in transimpedance amp circuit
I have a circuit (attached) that is providing too much voltage into my FPGA. I attached the circuit. The output of the transimpedance amp (OPA380) is sending 4.2V to my FPGA which only needs 3V. I have reason to believe that the 4.2V input into the FPGA is causing some weird anomalies to...- robismyname
- Thread
- Replies: 7
- Forum: General Electronics Discussion
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converting rs-232 voltage to current in my circuit design
Im using a TI Transimpedance Amplifier OPA138 in a design. The amp is used to convert input current to voltage output. For reasons related to quick testing capabilities I want to take rs232 voltage signals (from my laptop) and input these signals into the amp. But the amp like I said before...- robismyname
- Thread
- Replies: 1
- Forum: General Electronics Discussion
