Bootstrapped driver circuit

Details Bootstrapped driver circuit Bootstrapped driver circuit

H - Electricity

03

K

320/1, 328/196,

H03K 17/60 (2006.01) H03K 5/02 (2006.01)

Patent

CA 1168317

Abstract Bootstrapped Driver Circuit A driver circuit charges a capacitive load to a voltage substantially equal to this voltage or potential of the power supply of the circuit by first charging the capacitive load with current flowing through a drive transistor under the control of the power supply potential and, thereafter, at a pre- determined time charging the capacitive load under the control of a precharged bootstrap capacitor. The driver circuit includes a transistor, acting as a pull-up device, connected between the power supply and the capacitive load and a series circuit including a charge source and switching means connected between the capacitive load and a control gate of the tran- sistor. The switching means is coupled to the capacitive load so as to be responsive to the voltage at the load for directing charge from the charge source into the pull-up transistor at a predetermined time to raise the voltage at the capacitive load to substantially the potential of the power supply. BU9-80-020

381265

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