Electronic ampere-hour meter

摘要

The meter comprises a resistor (S) connected in series with the system consuming power (C). The voltage measured across the terminals of the resistor (S) is applied to the input of a modulator (MD) which modulates the signal generated by a multivibrator (MV). The modulated signal is amplified by an amplifier (AA) and demodulated by the demodulator (DM). The demodulated signal is sampled by a sampling integrator (IE); a display device (SA) displays the measured value. <IMAGE>