What does a LM311 comparator do?

The LM111, LM211, and LM311 devices are single high-speed voltage comparators. These devices are designed to operate from a wide range of power- supply voltages, including ±15-V supplies for operational amplifiers and 5-V supplies for logic systems. The output levels are compatible with most TTL and MOS circuits.

What is a LM311?

LM311 is a voltage comparator with high speed. It is able to perform tasks over a large range of voltages. Its output levels are compatible with MOS circuits. Relays and lamps can be controlled by LM 311 when it is operating at 50V and 50mA as well.

What is Schmitt trigger comparator?

In electronics, a Schmitt trigger is a comparator circuit with hysteresis implemented by applying positive feedback to the noninverting input of a comparator or differential amplifier. It is an active circuit which converts an analog input signal to a digital output signal.

How do you find the output voltage of a comparator?

The equation is Vref = (V+/ (R1 + R2)) x R2. Substituting the values given in the circuit diagram into this equation gives Vref = 6V. Whenever Vin goes above 6V, the output swings to ~+12V DC and vice versa.

What is a voltage comparator?

A comparator circuit compares two voltages and outputs either a 1 (the voltage at the plus side) or a 0 (the voltage at the negative side) to indicate which is larger. Comparators are often used, for example, to check whether an input has reached some predetermined value.

How does a voltage comparator circuit work?

What is a voltage comparator circuit?

Voltage comparator is a circuit which compares two voltages and switches the output to either high or low state depending upon which voltage is higher.

What is the output voltage of a comparator?

Hence, the output value of a non-inverting comparator will be equal to +Vsat during the positive half cycle of the sinusoidal input signal. Similarly, during the negative half cycle of the sinusoidal input signal, the voltage present at the non-inverting terminal of op-amp is less than zero volts.

How does Schmitt trigger circuit work?

How Does a Schmitt Trigger Work? A Schmitt trigger makes use of positive feedback – it takes a sample of the output and feeds it back into the input so as to ‘reinforce’, so to speak, the output – which is the exact opposite to negative feedback, which tries to nullify any changes to the output.

What is reference voltage in Schmitt trigger?

The Schmitt trigger circuit can be designed with the help of two transistors. The circuit diagram of the transistor-based Schmitt trigger is given in the below circuit. Transistor based Schmitt Trigger. Vin = input voltage. Vref = Reference voltage = 5V.

What is Schmitt trigger using op-amp?

The Schmitt trigger is a widely used circuit used with a comparator to provide noise immunity and reduce the possibility of multiple switchings cause by noise on the input.

How do you make a voltage comparator circuit?

Here the reference voltage is set using the voltage divider network comprising of R1 and R2. The equation is Vref = (V+/ (R1 + R2)) x R2. Substituting the values given in the circuit diagram into this equation gives Vref = 6V. Whenever Vin goes above 6V, the output swings to ~+12V DC and vice versa.

What is the output voltage of lm311 comparator?

The LM311 output can sink 8 mA. A comparator’s output is essentially binary, high or low. Pin 8 is V+ and pin 4 is V-. The total supply voltage can go up to 36V. V- can simply be connected to ground as here if the comparator threshold is above ground by a volt or so. The supply voltage to the LM311 does not have to be the same as the logic supply.

What is the function of the output voltage of Schmitt trigger?

Often, the output voltage of the Schmitt trigger acts as the reference voltage of input waveforms. It functions to convert noise from its analog input signal form to digital signal.

What is the purpose of a voltage comparator?

The other is used to measure the target signal, such as the voltage on a sensor. The output will go high or low, depending on set-up, as the sensor voltage goes above or below the reference. Voltage comparators like the LM311 do this with high accuracy, fast response, and minimum external component count.