Simplified-voltage-level-sensor

This circuit utilizes a single junction component, either one LM393 dual comparator or one LM339 quad comparator. Resistors RV1 and RV3 are responsible for establishing the full-scale reference voltage, while resistors RV2 and RV4 are used to set the switching thresholds to a value between 0 V and the full-scale reference. The change in input voltage required to completely switch the output state is typically less than 0.05 mV.

The circuit operates by comparing an input voltage against a reference voltage set by RV1 and RV3. The LM393 dual comparator or the LM339 quad comparator can be employed depending on the design requirements. The choice of comparator affects the number of channels available for comparison and the overall complexity of the circuit.

RV1 and RV3 are configured to set a precise reference voltage, which is critical for the accurate operation of the comparators. These resistors can be adjusted to calibrate the output according to the specific needs of the application. RV2 and RV4 are also adjustable, allowing for fine-tuning of the switching thresholds, which are the points at which the output state of the comparator changes. By setting these thresholds between 0 V and the reference voltage, the circuit can be tailored for various input signal ranges.

The high sensitivity of the circuit is indicated by the requirement for a change in input voltage of less than 0.05 mV to switch the output state. This characteristic makes the circuit suitable for applications where precise voltage detection is necessary, such as in sensor interfaces or low-level signal processing.

In a practical implementation, careful consideration must be given to the layout of the circuit to minimize noise and ensure stable operation. Bypass capacitors may be added near the power supply pins of the comparators to filter out voltage spikes. Additionally, the use of shielded cables for input signals can further enhance the performance by reducing interference.

Overall, this circuit design is efficient for applications requiring precise voltage comparison and switching capabilities, making it a valuable component in various electronic systems.This circuit uses only one JC, either 1, LM393 dual comparator or 1/z, LM339 quad comparator. RV1 and RV3 set the full scale reference voltage, and RV2 and RV4 set the switching thresholds to a value between 0 V and the full-scale reference. The change in input voltage needed to fully switch the output state is less than 0.05 mV (typical). 🔗 External reference