Fast voltage level shifter circuit

摘要

A voltage level shifting circuit with an input terminal and an output terminal. The level shifting circuit has a field-effect transistor (FET) switch with a gate attached to the input terminal, a drain attached to the output terminal and a source attached to a current changing mechanism. The current changing mechanism includes a current mirror circuit having an output connected between the source and an electrical earth. The output of the current mirror circuit is preferably adapted to change a current flowing between the drain and the source based on an input voltage applied to the gate.

主权项

1. A circuit comprising:
a switch configured to produce an output voltage on an output terminal in response to an input voltage applied to an input terminal and in response to a current drawn through the switch; a current mirror circuit having a control input and configured to draw the current through the switch in response to the control input; and a charge storage circuit connected to the input terminal and to the control input of the current mirror circuit, wherein the charge storage circuit is configured to discharge a stored charge into the control input in response to the input voltage.