The Zero-Beat Method of Frequency Discrimination

摘要: A method of frequency discrimination in which the balance is determined solely by controlling oscillator explained. The utilizes phase turnover, occurs at zero beat, between two beat sources when one beating signals dephased 90 degrees before it applied to detectors. network inserted shifts its an additional and makes output a direction function frequency. beats are then amplified supplied balanced rectifier, from direct voltage available changes polarity with deviation.