Tag Archives: Pre-Amplifier

Voltage Controlled Gain Video Amplifier

Posted on September 15, 2011 by Rust

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

Posted on July 10, 2011 by Rust

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

Posted on January 31, 2011 by Rust

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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