How does LM386 circuit work?
The IC LM386 is a low-power audio amplifier, and it utilizes low power supply like batteries in electrical and electronic circuits. When this amplifier uses a 6V power supply for the operation then the static power drain will be 24 milliwatts to make the amplifier for an ultimate operation of the battery.
How do you calculate LM386 gain?
Voltage Gain Analysis:
- Without any external components, it has a gain of Gv = 2x15K/(150+1350) = 20 (26 dB).
- With a capacitor (or shortcutting) between pins 1 and 8 , it has a gain of Gv = 2x15K/150 =200 (46dB).
How does an amplifier IC work?
The power amplifier works on the basic principle of converting the DC power drawn from the power supply into an AC voltage signal delivered to the load. Although the amplification is high the efficiency of the conversion from the DC power supply input to the AC voltage signal output is usually poor.
How do you make an amplifier circuit?
Out of three transistors we are going to use only BJT transistors.
- Step 1: Fixing the Q-point of Transistor.
- Step 2: Finding HFE of BC547 Using Multimeter.
- Step 3: Designing CE Amplifier.
- Step 4: Voltage Divider Circuit.
- Step 5: Practical Method to Find Resistance of Input Circuit.
- Step 6: Simulated Result.
What is amplifier circuit?
It is a two-port electronic circuit that uses electric power from a power supply to increase the amplitude of a signal applied to its input terminals, producing a proportionally greater amplitude signal at its output. An amplifier is a circuit that has a power gain greater than one.
Is LM386 an op-amp?
The LM386 is an operational amplifier than has been specifically designed for use in audio applications… which means its performance is based on the assumption that it will be driving speakers. At least at some point. However it can, like most other basic audio amplifier chips, be used as a regular op-amp as well.
Why do audio speakers have different ratings?
All speakers have an impedance rating in ohms, which represents how difficult the speaker is to power. The lower the impedance, the more efficiently it allows the electric signal, which is basically the music, to pass through the speaker.
What are the connections in an IC LM386?
This connector will be having three connections like the ground right and left audio. This LM386 IC is a simple amplifier and connects the right or left audio to this amplifier using an audio source with the ground terminal. The input level in this circuit can be controlled by connecting a potentiometer to the input.
How is an LM386 audio amplifier circuit designed?
A simple but efficient Audio Amplifier is designed using LM386 Audio Amplifier IC. The working of the circuit is very straight forward as all the work is done by the LM386 IC itself. When the system is powered on and proper audio input is given at the input, the LM386 Amplifier the input signal by a factor of 200 and drives the output speaker.
What is the supply voltage range of LM386?
LM386 has a wide supply voltage range 4-12v. Below is the Pin diagram of LM386. Pin description of LM386 is given in the following sections along with the functions of external components used for amplification. So let’s start building our simple LM386 based audio amplifier circuit design.
What kind of power draw does a LM386 have?
LM386 is a low voltage power amplifier with an inactive power draw of 24mW, which makes it suitable for battery controlled applications. The most common package for LM386 is an 8 – pin DIP.