Free Simple Circuit Diagram
The basis of an audio mixer is an inverting summing circuit below. For real audio mixers, a single-supply voltage is seldom used. To increase dynamic range, the designer will often push an op amp up to, and sometimes beyond it’s recommended voltage rails. Noninverting summing circuits are not recommended, but it’s possible to use. The source impedance becomes one of […]
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This is a 1st order ALL pass filter circuit. All frequencies are allowed at the same gain by this circuit. Here is the schematic diagram of the circuit: We can change the signal’s phase using this circuit. This circuit can be used to correct the phase of the signal as well. At F(90) this circuit has a 90° phase shift. […]
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We can also operate TDA8932B/33(B) from a symmetrical supply. On this diagram, three half supply voltage buffers are disabled. When supplied from a symmetrical supply, HVPREF (Pin 11), HVP1 (pin 30) and HVP2 (Pin 19) should be connected to ground. Here’s the circuit diagram: Compared to an asymmetrical supply, a symmetrical supply has some benefits. First, the size of the […]
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This circuit is an Unity Gain Buffer. This circuit has a highest input impedance of any OP-AMP circuit. This circuit has a less gain error that is equal to common mode rejection or the reciprocal of the amplifier open-loop gain. The multiplication of the open-loop gain and the differential input impedance parallel with common mode input impedance will result the […]
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