Tag Archives: Pre-Amplifier

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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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Voltage Controlled Gain Video Amplifier

Gain adjustment will be more flexible if it controlled by a voltage signal, since we can use many methods to provide user interface. We can control it by a potentiometer with anti glitch filter, or we can drive it with … Continue reading

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Magnetic Phono Cartridges Transistor RIAA Preamp

The following two-transistor circuit is a pre-amplifier circuit for magnetic phono cartridge, which is characterized by its frequency response defined by RIAA standard for phono recording. This pre amp circuit¬† has gain around 40 dB (midband) at 1 kHz. Here … Continue reading

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Mic Pre-Amp with Clipping

Signal clipping is usually avoided in most application, but we can find some useful examples where clipping is intentionally employed in audio processing. One example is signal limiter in SSB or radio transmission.¬† In radio communication, the source of modulating … Continue reading

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