Low Input Capacitance Boosted Phase Driver With Short Phase-To-Phase Delay
Original Publication Date: 1985-Mar-01
Included in the Prior Art Database: 2005-Feb-18
Most boosted drivers require two boosting phases and a pass gate driver to perform the boosting phase. In this design, the output rises as a single phase with a relatively short delay from the input time to the output time. In addition, the input capacitance is minimized. I1 and I3 (Fig. 1) are inverters and I2 is a high voltage inverter that puts VH + 0.6VH out on the gate of device T11. Device T24 precharges both capacitor C1 and the gate of device T14, allowing the output to begin to rise. The current for the output is supplied through devices T13 and T14. As the output rises, capacitor C2 helps to boost the gate of device T13 to promote good current through device T13 to the output. As I2 fires, capacitor C1 begins to boost so that device T14 can pass the boosted voltage to the output.