I am looking for advice on the existence and application of a component that will drop exactly 10 V under any conditions within a given range. I am tasked with designing a system take the response of two thermistors, linearize it, convert the signal to 4-20 mA DC, and, ultimately, control a pump system based on the difference in temperatures of two reservoirs. At the moment, I am struggling with an aspect of the transmitter design.
I have successfully modeled an op amp configuration that will linearize the voltage across the thermistor and developed a transconductance amplifier to convert an input voltage into the appropriate current range for the control loop. The problem is that the transconductance amplifier requires an input of 1 V to 5 V, but the output from my thermistor amp is nowhere near that.
To address the issue, I developed a non-inverting amplifier that will give a change in voltage of exactly 5 V over the sensing range of my thermistor; however, the output voltage there is still too high. The perfect solution would be a component that would allow me to drop exactly 10 V regardless of the output voltage of the op amp, but I'm not sure what component I would be looking for. Any help would be greatly appreciated.
I have successfully modeled an op amp configuration that will linearize the voltage across the thermistor and developed a transconductance amplifier to convert an input voltage into the appropriate current range for the control loop. The problem is that the transconductance amplifier requires an input of 1 V to 5 V, but the output from my thermistor amp is nowhere near that.
To address the issue, I developed a non-inverting amplifier that will give a change in voltage of exactly 5 V over the sensing range of my thermistor; however, the output voltage there is still too high. The perfect solution would be a component that would allow me to drop exactly 10 V regardless of the output voltage of the op amp, but I'm not sure what component I would be looking for. Any help would be greatly appreciated.