We found this circuit with very high input resistance in an old documentation. The circuit is still current by the operating it uses. This is a still common quadruple type that should typically be powered by a 3 to 12 V symmetrical source.
We found this circuit with very high input resistance in an old documentation. The circuit is still current by the operating it uses. This is a still common quadruple type that should typically be powered by a 3 to 12 V symmetrical source.
