Analog Devices, Inc.
Reconfigurable low power and low area gate bootsrapping circuit

Abstract:

A sampling circuit comprises a switch circuit and a gate bootstrapping circuit. The switch circuit includes a switch input to receive an input voltage, a gate input, and a switch output. The gate bootstrapping circuit provides a boosted clock signal to the gate input of the switch circuit. The boosted voltage of the boosted clock signal tracks the input voltage by a voltage offset. The gate bootstrapping circuit includes a single boost capacitance coupled between a first circuit node and a second circuit node. A high supply voltage is applied to the first circuit node and the input voltage is applied the second circuit node to generate the boosted voltage on the single boost capacitance.