Patent ID: 8536808

Claim:
An integrated CMOS bootstrap circuit for temporarily supplying a first voltage from a system voltage supply to a bootstrap node in a CMOS device during a first time period, and for transmitting a second voltage from a switch output node to the bootstrap node during a second time period, the second voltage being different from the first voltage, the bootstrap circuit comprising: a bootstrap diode and a bootstrap capacitor connected in series and coupled between the system voltage supply and the switch output node, the bootstrap diode having an anode connected to a first bootstrap node and a cathode connected to a second bootstrap node, and the bootstrap capacitor being connected between the second bootstrap node and the switch output node; a feedback diode having an anode connected to the switch output node and a cathode connected to the first bootstrap node; a switch connected between the system voltage supply and the first bootstrap node; and means for controlling the switch to connect the system voltage supply to the first bootstrap node during the first time period, and for disconnecting the system voltage supply from the first bootstrap node during the second time period.