TA7376 Headphone amplifier for making super square effect, TA7376 Headphone Amplifier
Keywords: TA7376, Headphone amplifier circuit diagram
Using headphones, especially small headphones listening to music, always feels not enough, and the effect is worse in low frequency sections. Therefore, the low-frequency characteristics of the earphone are used native, and the stereo inverse synthesis is used, and the inner simple matrix surround sound circuit can be obtained, and the strong bass and the wide range of bandwidth in a wide range.
The unit is called the super square effect. This kind of exciting power is not as a live stereo.
Circuit principle
The motor circuit can be roughly divided into three parts:
1. Low frequency enhancement circuit consisting of resistance capacitance.
2. Use the feedback input of the power amplifier IC to form a vectors inverted phase synthesis circuit.
3. Use the power amplifier IC to form a driver circuit of headphones.
The resistance capacitance from the input IC acts as a function of enhancing the low frequency characteristic, because the potentiometer is added, and the low frequency portion can be continuously adjustable between 0 and 10 times.
After the DC coupled capacitance of the stereo inverted synthesis circuit IC 2 pin and 8 pin, it consists of 0.47uF and 50K potentiometers. In this circuit, the three-dimensional portion of the high-stroke portion in the stereo square effect ingredients is reversely synthesized, and the effect is enhanced.
Push the headset with Toshiba TA7376P. This IC is hidden in two channels, and the external components can be operated at low voltages. When the load impedance is low, the low frequency sound of the people can play again.
If the power supply is changed with a 5 # battery, with four series, the voltage is 6V, and the high output speaker can be directly driven. Get better results if the capacitance of three 200uf / 10V is increased to 1000uF.
Component selection
There is nothing special in all components. The resistance is 1 / 8W. 0.1uf and 0.47uF capacitors with monolithic capacitors, other electrolytic capacitors. In the potentiometer, 20K is a dual connecting potentiometer, 50K with a switch potentiometer. Plug with stereo plug.
The production is extremely simple, even beginners, one day is enough. Pay attention to the polarity of the IC's foot and electrolytic capacitance.
The wiring of the potentiometer is more messy, don't make a mistake. If there is no wiring error and poor welding, it will be a success.
Access headset or ordinary headset, load the battery, open the switch. If the two knobs are well matched, listen to music can get an extremely touching effect. According to the listening music and the source of the sound source, this is the method of usage of this unit.
Needless to say, with small audio, TV, and CD will be better effect. Be
Description: In the circuit schematic, W1 is a dual potentiometer for bass enhancement, and W2 is to adjust the reverberation effect. In the printed circuit board, A1, A2 are input to the left and right channels. Both potentiometers W1 and W2 are fixed in the edge of the box, where W2 is a potentiometer with a switch.
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