Hi-Fi Audio Amplifier | Electronic Project Circuits

Posts Tagged ‘Hi-Fi Audio amplifier’

Amplifier ic 18W using HA13118

IC amplifier 18 watt circuit is an IC number HA13118 Hitachi Hard. That the IC will be integrated amplifiers, class AB. And this cycle is to use a bridge circuit. As a result, growth rates up to 55 dB. And pressure from 8-18 volt the current 1-2 amps, with less than 0.2% distortion at 1W. And response. frequencies from 30 Hz-30 kHz.
When entering the power supply circuit, and paid into the audio input. The audio is through VR1 adjusts the level of the audio signal. And pass the C1 coupling signal. The C2 eliminate the interference. From the audio signal to be sent through to the input pin on pin 3 of IC1. That this circuit to circuit in the form of bridge circuits or extension of the left navigation. And right channels together, to get a higher watt power. The observations from the pin 15 which is the output of left channel speakers are connected to one side. And the other side of the speakers are connected to the output of pin 8, which is the output of the right. The C7 and C8 acting feedback signal to the circuit’s frequency response is better. The C9, C10, R1 and R2 will serve removed the devices. And C11, C12 serve to filter the light properly to prevent any noise shock.

Be the first to comment - What do you think? Posted by admin - November 16, 2010 at 9:38 am

Categories: Power Amplifier Tags: Amplifier ic, Class AB Amplifier, Hi-Fi Audio amplifier

25W Hi-Fi Audio Amplifier using ic LM1875

This circuit is the audio amplifier circuit has a very popular one.This is a simple circuit. Small pieces of equipment. And Watt are high.The circuit uses IC number LM1875, which is under the protection circuit IC output or Too short circuit. And a significant distortion as low as 0.015% at a frequency of 1kHz.

This circuit uses positive, negative ground power supply to get the audio signal with both halves of the signal swing, positive and negative halves,The sound that came out crystal clear.Work is. When paying into the audio input. Audio is through R1, R2, C1 and R3 to limit the audio signal appropriately.And limit the noise to the input signal mixed down to the ground.Then sends a signal to noise to the input pin of IC 1.A noninterting pin, amplifier non-return phase.Out of the 4 output pins to access the speakers.The R6 and C4 eliminate noise mixed with the output down to the ground.And another part of the audio output pin 4 of integrated circuit will be fed back into place through R5 to pin 2, which R4 and R5 determines the rate of boost up, can be calculated from R5/R4,will gain equal to 15 times, With a C2 to meet high frequencies better.

Be the first to comment - What do you think? Posted by admin - September 29, 2010 at 1:11 am

Categories: Power Amplifier Tags: Hi-Fi Audio amplifier, LM1875, Single Chip Amplifier

Hi-Fi audio amplifier by ic TDA2003

This is the Hifi power amplifier circuit, will be used TDA2003 ic number. The normal operation of the integrated circuit,the music amplifier for car audio radio sound.Which it uses the supply voltage from 12 volt car battery.But this circuit adapted for use at home by listening to change power supply to 15 volts.
This allows a higher watt power than the existing 3watt RMS.The TDA2003 IC is protected from damage and short circuits,When the load over.Maximum Voltage of 28 volts, the frequency response 40 Hz – 15 kHz.
When entering the power supply 15 volts to the circuit. The C1 coupling audio signal through the VR1 to adjust the volume.Then sent to the C2 anti-noise DC input signal to the pin 1 of IC.The non inverting amplifier circuit is a non-return phase.This is the signal output pin 4, by a C5 enhances the stability of low-frequency response the better.And noise will be dropped down to ground by R4 and C6 before output to speakers.Another part of the output signal, which is fed back through C3, and R1, to enter the pin 2 inverting.To maintain a constant frequency response at-3dB.And if you want to add. Frequency response is to reduce the C3.The C8 is a filter file before the operation.C7 cut out noise from the supply.If you want a stereo amplifier,Is to create an additional set.