RUBIDIUM FREQUENCY STANDARD Russian patent published in 2003 - IPC

FIELD: passive quantum frequency standards; forced frequency control standards. SUBSTANCE: newly introduced in prior-art rubidium frequency standard, type Ch1-50, are analog-to-digital and digital-to-analog converters, memory register, second buffer amplifier, analog detector, and dual-channel switching device. Standard- frequency signal is passed through second buffer amplifier and analog detector to control input of switching device. Frequency-standard crystal oscillator opens and standard-frequency signal is applied to synthesizer and frequency multiplier inputs; error signal arriving from integrator output is applied to analog-to-digital converter input and further to memory register. Saved error signal is passed from digital-to-analog converter output in analog form to device controlling saturating current of rubidium discriminator solenoid. Memory register recording is disables as soon as error signal equals zero. EFFECT: additional ability of automatic disabling of frequency standard by standard-frequency signal. 1 cl, 2 dwg