Category Archives: Signal Processing

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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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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: amplify the signal with a consistent/stable gain without altering the waveform. A stability of its gain make it possible to … Continue reading

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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 system (before adding the tone control). Very simple circuit can be built using Baxandall configuration, which uses only capacitors, resistors, … Continue reading

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Averager and Peak Hold/Extender Signal Conditioner

A signal averager circuit can be formed by an amplifier and active signal rectifier, which is implemented using two operational amplifiers in this circuit. The first op-amp is configured as inverting amplifier and the second forms an active half-wave rectifier. … Continue reading

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Speech-Pass Filter

A speech-pass filter circuitry is shown in the the schematic diagram below. This speech circuit is useful in an application when the frequency spectrum of the signal should be limited to contain only speech (human voice) information. Voice recording or … Continue reading

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