Category Archives: Audio and Music

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MAX1703 Single-Cell Boost Converter Circuit

When you design a circuit with only a single-cell battery, you will need boost-converter to provide enough voltage for most ...

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55MHz Scope Sensitivity Amplifier

Scope sensitivity amplifier is a vital front-end signal processing for every scope instruments. The function of this circuitry is simple: ...

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Two-Band Bxandall Active Tone Control

Using active circuit for tone control means that we can provide cut and boost, maintaining overall amplifying factor of original ...

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Pulse Width (PWM) Controller Circuit

A LM3900 quad operational amplifier can be used to build a pulse width (PWM) controller. The LM3900 was chosen because ...

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Small TV Modulator Using A Motorola MC1374

How can television modulator be small and simple like this? First, it uses integrated circuit, and the second, any TV ...

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Basic Audio Mixer Using Op-Amp

Audio mixer is used to mix several audio signal from many channel into one channel, in analog form. The basic requirement of an audio mixer is that the mixed signal is a product of simple addition. When connected to several … Continue reading

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Basic FET Amplifier

This is The Fet Amplifier circuit. This circuit uses FET transistor. The gate of the FET must be negative with respect to the source, so a bias can be achieved in the following manner. The voltage that is across the … Continue reading

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Darlington Pair Transistor Configuration

This a circuit of The Darlington Pair, on of popular transistor circuit configurations. Sometimes, this circuit is called the super alpha pair circuit. This circuit is used as power output stage. This circuit can give amplification of 10000 times. Here … Continue reading

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DC Coupled Transistor Amplifier

This is a The Directly (DC) Coupled Amplifier circuit. This circuit is built from NPN transistor and PNP transistor. This circuit is used to amplify a DC signal. Since there is no coupling capacitor to block DC, this circuit can … Continue reading

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