| 摘要 |
1. A sawtooth-shaped current generating oscillating circuit comprising a capacitor (5) fed by a current generator (11) which operates in two directions by either feeding the capacitor with a current (I1 ) or absorbing a current (I2 ), and a follow-up amplifier (12) transmitting to an output terminal (13) the sawtooth-shaped current, characterized in that a first comparator (14) compares the voltage Vc et the terminals of the capacitator (5) to that of a first predetermined voltage threshold value (S1 ), and in that a second comparator (15) compares the output current to a second predetermined current threshold value (S2 ), each comparator remaining blocked in its state until the other comparator has reached the threshold value related to it, said comparators applying control signals to the current generator for determining the time intervals during which the latter produces a current (I1 ) and during which it absorbs a current (I2 ). |
