Tag Archives: Filter

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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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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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5 Frequency Responses (3 bands) Tone Control

For most audio amplifier application, this 5 frequency responses will appropriate. The frequency response variation will be flat (no modification of the input signal), bass cut, bass boost, middle cut, middle boost, treble cut, and treble boost. To comply with … 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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Programmable Capacitance Multiplier with DAC

Capacitance multiplier simulate high capacitance capacitor for analog signal signal processing. By using DAC (Digital-to-Analog Converter), we can simulate variable capacitance with very wide range, which can be used in digitally controlled analog processor (programmable filters for example). The following … Continue reading

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