New circuit precisely compares phases of two RF signals nearly equal in frequency, such as two hydrogen-maser frequency standards. Measuring circuit minimizes interactions between two sources. Also stabilized against thermal effects and against noise that could produce erroneous readings. Heat sinking, buffer amplifiers, and low-noise zero-crossing detector make picosecond precision possible.
Precise Phase Comparator for Nearly Equal Frequencies
NASA Tech Briefs ; 6 , 3
1982-12-01
Sonstige
Keine Angabe
Englisch
Femtosecond time-domain phase comparator
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