Category Archives: Signal Processing

Voltage to Frequency Converter Using UJT

Posted on October 28, 2011 by Rust

The following voltage to frequency converter (V/FC – VCO) circuit consist of a UJT (uni-junction transistor) oscillator in which the timing charge capacitor C2 is linearly depends on the input signal voltage. The voltage across resistor R5 set the charging … Continue reading →

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Programmable Capacitance Multiplier with DAC

Posted on October 13, 2011 by Rust

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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Fuzz Box Distortion Pedal – Guitar Effect

Posted on October 1, 2011 by Rend

This guitar effect circuit uses a simple high gain amplification, followed by a symmetric clipping using parallel diodes clipper. The gain of the 741 op-amp pre amplifier will be R3/(total impedance of guitar pickup + C1).  With 1 kOhm guitar … Continue reading →

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