Electrical Engineering › Section Q · Thyristors, operational amplifiers, and power conversion › Topic Q.6
Voltage-to-current conversion, averagers, and summers
With negative feedback an op-amp can force a precise current through an unknown load, or add several signals with chosen weights. These two jobs carry measurements across factories and mix sound in every studio.
In this topic
- Why send a current?
- The voltage-to-current converter
- Transconductance and compliance
- Worked example: a 4-20 mA transmitter
- The passive averager
- The noninverting summer
- The inverting summer
- Worked example: a weighted mixer
- Worked example: averaging, then summing
- Summers as computers
- Common mistakes to avoid
- Key takeaways
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