초록

An apparatus that includes a driver circuit and an active load circuit coupled to an output of the driver circuit. The active load circuit is configured to actively adjust the slew rate of a signal outputted by the driver circuit.

대표청구항 ▼

[ What is claimed is:] [1.] A circuit comprising:a driver circuit configured to output a signal;a load circuit coupled to the output of the driver circuit; andan active load circuit coupled to an output of the driver circuit, the active load circuit configured to actively adjust the slew rate of the

[ What is claimed is:] [1.] A circuit comprising:a driver circuit configured to output a signal;a load circuit coupled to the output of the driver circuit; andan active load circuit coupled to an output of the driver circuit, the active load circuit configured to actively adjust the slew rate of the signal wherein the active load circuit comprises:a capacitive load circuit; anda variable impedance circuit coupled between the driver circuit and the capacitive load circuit, the variable impedance circuit configured to adjust the slew rate in response to changes in fabrication process and operating conditions wherein the variable impedance circuit comprises:a first and a second nMOS transistor coupled between the output of the driver circuit and the capacitive load circuit;a first and a second pMOS transistor coupled between the output of the driver circuit and the capacitive load circuit, wherein a gate of the first nMOS transistor and a gate of the first pMOS transistor are coupled to an output of the load circuit; andan inverter having an input coupled to the output of the first load circuit, and an output coupled to a gate of the second nMOS transistor and to a gate of the second pMOS transistor.