DEVELOPMENT OF ELECTRONIC LOW FREQUENCY MEASURING INSTRUMENT

Abstract

Low FrequenciEs are, generally, measured by using period measurement. The method, however, inherits in- accura.y as one have to take reciprocal of time period tcc measure frequency. Here frequency multiplying technique using PLL is used to multiply the low frequency and this multiplied frequency is, then, counted using frequency ccmparision: scheme.Thus display counters will display directly in terms, of' frequency0 with proper decimal adjust-ment.