This is a potentiometer-adjustable inverting gain stage in a DIP8 footprint for convenient breadboard prototyping.Designed by Macalister Electronics in United Kingdom
What is it? This module implements an inverting amplifier with gain adjustable from -20 to +20 dB for audio use. Why did you make it? The goal for this module was to implement an adjustable gain/atte…Read More…
This module implements an inverting amplifier with gain adjustable from -20 to +20 dB for audio use.
The goal for this module was to implement an adjustable gain/attenuation stage that could be adjusted without a screwdriver, in the smallest possible footprint.
The module fits inside a DIP8 footprint whilst still including a potentiometer with an integrated knob. Typically implementing this functionality on a breadboard with discrete components would involve using a DIP8 op-amp and a through-hole potentiometer next to it (plus some TH passives). With this module it can implemented within the same footprint as just the op-amp.
The module requires a bipolar power supply. The details of the supply range and pin-out can be found by following the Documentation link below but typically +4.5 V, 0 V, and -4.5 V would be required on the V+, Vref and V- pins respectively. The module includes power supply decoupling so external decoupling capacitors should not be required.
An input signal (referenced to Vref) applied to the Input pin will appear amplified/attenuated (and inverted) at the Output pin (also referenced to Vref) by an amount determined by the potentiometer position.
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