A direct coupled linear amplifier is described which has been used as an interface between time mode operated multichannel analyzers or instrument computers and electromagnet control amplifiers or voltage controlled oscillators for magnetic resonance signal averaging. The amplifier accepts the analog memory channel address voltage from the analyzer or instrument computer and attenuates, biases, amplifies, and inverts the signal as required. Operating techniques and circuit stability are discussed.
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D. R. Torgeson (1973) studied this question.
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