Amplifier for samples of analog signals with stepwise vera using visible amplification factor sufficient

摘要

In a sample amplifier having gain variable by discrete value, in which it is desired to bring the samples into a range of specific voltages by means of a suitable amplification factor, two comparators are fed respectively by two reference voltages, and the amplified samples taken successively at different points of the amplification chain are compared to these two reference voltages. A logical decision circuit, associated with a bi-directional counter, allows the "addressed" command of analogue gates connected respectively to the various points of the amplification chain, so as to effect these two comparisons at points determined by the cabled programme of the counter-deducter.