Analog Tachometers
Charles E. Robinson · IEEE Transactions on Industry and General Applications · 1966
Direct current analog tachometer generators are used extensively in industry to provide speed signals for use with instrumentation, and in feedback loops for closely regulating the speeds of drive systems. The accuracy of these tachometers is affected by changes in environmental conditions (such as temperature) to which they are exposed. By using proper design techniques along with the proper materials, these effects can be virtually eliminated.