Voltage Amplifiers and Recorders

Many times, in an effort to reduce amplifier noise, capacitors are added across the output of the amplifier, and occasionally at the input (45). These capacitors frequently reduce the response time of the amplifier, which causes a shift in the curve peaks and also a loss of peak resolution. A proper value of capacitor must be used, if noise is a problem, to form a compromise between noise reduction and loss of peak resolution. Amplifier impedance mismatch can also cause nonlinear output voltages, which can distort the curve peaks. 

Various recorders have been described, from photographic light-beam galvanometer types to modern electronic potentiometric recorders. Burgess 

A number of DTA instruments are described here an attempt is made to include only those instruments which possess some novelty in design or that have made important contributions to the development of DTA instrumentation. 

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