Methods and circuits for operating a parallel DMOS switch

摘要

A method and corresponding circuits for operating a parallel DMOS switch that includes a pair of P-type DMOS devices connected in series with each other and in parallel with a pair of N-type DMOS devices connected in series with each other. The method and circuits involve turning the switch on by applying gate signals to the DMOS device pairs which are generated using at least one source voltage of a DMOS device pair. The switch is turned off by setting the gate signals equal to the respective source voltages of the DMOS device pairs.

主权项

1. A method for operating a DMOS switch including a first DMOS device pair and a second DMOS device pair, the method comprising:
turning on the switch by generating a respective gate signal of each DMOS device pair using a source voltage of a DMOS device pair in the switch, wherein:
each gate signal is generated by processing a corresponding source voltage through an amplifier;the first DMOS device pair includes two NDMOS devices connected in series; andthe second DMOS device pair includes two PDMOS devices connected in series.