Negative voltage generator with voltage limiting circuit

摘要

The generator includes an oscillator (3) which generates a clock signal (OSC) applied to a phase generator (2). The four outputs from the generator (ABCD) are applied to a bank of series capacitors (1) which generate a negative voltage. The generator is provided with a limiting circuit (4) which receives the negative voltage on an input (5) and generates a logic signal (ON) function of the voltage value. The circuit includes a comparator and a capacitor bridge which compares the voltage value with a reference value.