Circuit in order to compensate for the lags of the zero in the analog devices and application of this circuit has an analog-to-digital converter (-, 1984,

摘要

P circuit in order to compensate for the zero shift introduced by the analog devices for processing the signals of zero mean values / p & & p & this circuit includes means for indicating the sign of the output signal with respect to the zero offset and two current sources 42 and 41 delivering currents 21 and 1 to a point / p & & p & m. the point m is connected to a capacitor 45. If the sign of the output signal is positive, the transistor 47 is made containing ucteur as well as the diode 46 and the capacitor is discharged by a current - i. If the sign is negative, the two sources deliver and the capacitor is charged by a current i. the voltage at point / p & & p & m is the compensation voltage added to the input signal. Application to the converters analog -. & / p