Patent ID: RE43015

Claim:
A capacitive high-side switch driver comprising: an inverter having an input for receiving an input signal; a first totem-pole buffer and a second totem-pole buffer, wherein said first totem-pole buffer is driven by said input signal and said second totem-pole buffer is driven by an output of said inverter; a first high-voltage capacitor and a second high-voltage capacitor, wherein the outputs of said first and second totem-pole buffers drive said first and second high-voltage capacitors respectively; a high-side transistor and a low-side transistor; a high-side circuit having an output terminal for driving said high-side transistor, wherein said first and second high-voltage capacitors are coupled to an input of said high-side circuit; a charge-pump diode having an anode supplied with a bias voltage; a bootstrap capacitor connected in series with said charge-pump diode, wherein said bootstrap capacitor has a negative terminal connected to a source of said high-side transistor, wherein said bootstrap capacitor has a positive terminal connected to a cathode of said charge-pump diode; and a bridge rectifier, wherein an input terminal of said bridge rectifier is connected to the input of said high-side circuit, wherein said bridge rectifier is connected in parallel with said bootstrap capacitor.