DIGITAL THERMOMETER Russian patent published in 1999 - IPC

FIELD: measurement technology. SUBSTANCE: invention is intended for design of digital thermometers operating together with thermal converters having frequency output channel, for instance, piezocrystal ones. Digital thermometer has thermal converter with frequency output, reference frequency generator, first and second AND gates, reversible counter, summing counter, flip-flop, code-to-frequency converter, frequency-to-code converter and indication unit. Design of thermometer is based on principle of multiple weight addition with automatic compensation thanks to presence of negative feedback. Negative feedback timely establishes required mode of dynamic equilibrium. EFFECT: increased precision and noise immunity of measurements. 1 dwg