1. comparator: LM324 can be used as a comparator to compare the input signal with a reference voltage and output a high or low level digital signal.

2. Filter: By using external capacitors and resistors, LM324 can be used as a filter to construct a low-pass, Qualcomm or bandpass filter.

3. Amplifier: LM324 can be used as an amplifier to amplify the input signal to the required level to meet the needs of specific applications.

4. Square wave generator: LM324 can be used as a square wave generator to generate a square wave signal by inputting a sine wave into the feedback circuit.

5. Signal generator: LM324 can be used as a signal generator to generate various signal waveforms through external circuits.

6. Voltage follower: LM324 can be used as a voltage follower to reflect the change of input voltage on the output voltage to maintain the relative relationship between them.

obvious advantage

LM324 chip is a multifunctional integrated circuit, which is often used in various electronic circuits, such as power amplifiers, sensors, automatic control systems and so on. LM324 series devices are four operational amplifiers with true differential inputs. Compared with standard operational amplifiers in single-supply applications, they have some significant advantages.

The four amplifiers can work under the power supply as low as 3.0 volts or as high as 32 volts, and the static current is one fifth of that of MC 174 1. * * * Mode input range includes negative power supply, so there is no need to use external bias components in many applications.