A method for the precise measurement of the difference between two low frequencies
Journal
IEEE Transactions on Instrumentation and Measurement
Date Issued
1985
DOI
10.1109/TIM.1985.4315268
Abstract
A method is presented for measuring the difference between two low frequencies with high resolution. The method is based on multiplying the two incoming frequencies by a large factor and then using a BCD up/down counter to store and display the resulting frequency difference.