Lm1458 | Electronic Project Circuits

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Stereo surround with ic lm1458

Integrated stereo surround sound will come out similar to the Concert Hall. And a simple circuit. Using the LM1458 IC number to expand the difference of the input signal left (L). It came out as surround sound sure enough.
When raising the power and enter the left and right input circuit.The signal on the left (L) to signal coupling through C2 and R1 to enter the pin 5 of IC1 / 1.And signs on the right (R) to signal coupling through R4 to C2 and to the pin 3 of IC1 / 2. Then the amplifier IC1 is the difference. Which the same signal is lost.Balance, but only signals different from the output pin 7 and pin 1.The VR1 / 1 and VR1 / 2 is a control gain of the signal on each side.Then the signal via C3 and C4 are coupling the audio signal and send out better,The output.By the way this output is connected to the headset. Or will be connected to the amplifier at all.

Be the first to comment - What do you think? Posted by admin - November 15, 2010 at 9:35 am

Categories: Audio diagram, Converter Circuit, Pre Amplifier Tags: lm1458, Stereo surround circuit, surround sound

Stereo Test Tone Generator with LM324 and LM1458

The purpose of this circuit is to create a pair of sine waves for testing stereo equipment. While it is useful for many types of audio test tone generation, the circuit is specialized for the purpose of aligning an FM Stereo Modulator, like the type used in low power FM stereo transmitters. Two tone outputs are available, the low tone has a secondary output that is 180 degrees out of phase with the primary output. The circuit is also handy for testing computer sound card inputs.