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An amplifier having a very low Thevenin equivalent output resistance is helpful to provide good damping. An ideal voltage source fits that profile. … A voltage-controlled voltage source might be specified as having a voltage gain, but you do not often see a spec like this for an audio amplifier. …

A really good audio amplifier will have an internal driving impedance very near zero ohms. … For light loads, like your 32 ohm example, less audio current is required of the amplifier compared to a load of 8 ohms. …

This kind of jack allows left and right speakers to be connected when no headphone plug is inserted (top image). Upon inserting a headphone plug, both speakers are disconnected by mechanical force of …

Could anyone explain why the output waveform is different from the desired crossever distortion waveform? Note that in linear applications, cross-over distortion is not desired - it is regarded as a …

Averaging a DC signal to reduce noise doesn't get rid of: DC offsets of amplifier chain Thermally-induced offset voltages Furthermore, noise tends not to be "white" at low frequencies. … Lock-in amplifier avoids all these pitfalls. You can place the reference frequency where the amplifier chain adds least noise. …

So if it wasnt capactive load on the output causing the issue what else could it be? This is serious oscillation, if it can be seen on a 2Mhz-bandwidth 'scope. My numerous encounters with similar …

One caution with the bridge-tied load.... Your load should be considered 8 ohms in series with a 1000uF capacitor. This will be a polarized electrolytic capacitor, whose polarity must be carefully ob …

Tony has addressed the upper cut off frequency at 15 kHz. About your other question (lower cut off frequency)... The product page claims that the MP401 MEMS microphone itself attenuates frequencies be …

An amplifier designer also ensures that at all other frequencies the matching network presents an impedance to the power transistor that ensures no spurious oscillations. An example 7 MHz amplifier. … A conservative designer might employ a MOSfet having larger limits, yielding a stable amplifier that remains within limits for any load impedance. …

It is good to review this. @Barry gives the good answer. Am attempting a more graphic solution using LTSPICE. The assumption is that a sine wave is the signal source, whose peak voltage just grazes th …

Class A biasing usually refers to a single transistor. Yes, Class A requires \$I_Q\$ to be about half-way. Class AB usually refers to two-transistor (push-pull), where one transistor takes care of upp …

Why doesn't the output then swing to the positive or negative voltage rail if the voltage at the negative input terminal fluctuates sinusoidally? Voltage at opamp "-ve" input doesn't fluctuate from …

Note that this buffer depends on your instrumentation amplifier to provide +3v bias - "input" must be connected directly to op-amp output. …

You could use almost any microphone preamp as a signal amplifier. You can also use a high-impedance preamp to emphasize the parallel-resonance mode of the transducer. … things: it amplifies voltage from a high-impedance source, and it presents to the Arduino a bias point about half-way between ground and Vref (assuming Vref=Vcc of 5v): simulate this circuit This amplifier …

A practical version of the Class-A amplifier might generate the base-bias voltage this way: simulate this circuit – Schematic created using CircuitLab The 12K and 2.7K resistor generates about …