JFET Compressor Circuit

Compressor Circuit -Ratio-Threshold-Attack and Release controls Out Level bypass feature ensures that there is a 9 volt battery works with sprint circuit layout prepared by PCBs

The proposed compressor is designed to compress the dynamic range of electric guitars signal with passive and active electronics. Compressor can be successfully used for signal processing bass. In the design of the compressor authors focused on the most simple circuitry, ensuring optimum signal to the technical characteristics of the guitar.

Test sounds

First of all, I recommend you to review the article here for detailed information about Compressors and a different circuit. The circuit provides Thereshold-Ratio-Release-Attack and Outlevel controls. It has bypass feature. It works with 9 volt batteries. PCB of the circuit is prepared with sprint layout.

The compressor is designed to compress the dynamic range of the signal of electric guitars with passive and active electronics. The compressor can be successfully used to process the signal of the bass guitar.

When designing the compressor, the authors of or relied on the simplest possible circuitry while providing optimal specifications for a guitar signal. With correct installation, the device does not require adjustment, it starts working immediately: DC modes are set automatically.

The amplification channel is built on field effect transistors, since among semiconductors these devices are best suited for guitar signal processing.

The input signal goes directly to the resistor converter T1, T2. The stage voltage is automatically generated, T1 – transistor with high cut-off voltage (4-5V). “Low cut” T2 and is equal to the initial drain current T2. The use of current as historical load T1 made it possible to significantly reduce the level of distortion at the output of the repeater when operating on a relatively low resistance load R 4+ R CH. p T2 at high signal levels.

The m-stage (T3, T4) was chosen as the main boost stage, which largely satisfies the requirements for smooth transition from linear mode to limiting mode and also provides low noise. significant gain, high linearity and harmonious distribution of spectrum harmonics.

Next, the signal goes to the push-pull repeater made on T5 and T6, which excludes the influence of the compressor load on the operation of the m-cascade. The repeater practically does not introduce additional distortion even when the signal at the output of the double amplitude m stage is close to the supply voltage.

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