Patent Number: 7,355,450

Title: Differential input buffers for low power supply

Abstract: A differential input buffer that can operate at lower power supply voltages and can receive differential input signals with wide common mode rage. In various embodiments, the invention combines native or depletion mode metal-oxide-semiconductor (MOS) transistors with the conventional enhancement mode n-channel (NMOS) and p-channel (PMOS) transistors in the design of the input buffer. The native or depletion MOS transistors can operate at lower power supply voltages and increase the input common-mode voltage range.

Inventors: Smith; Mian (Los Altos, CA)

Assignee: Altera Corporation

International Classification: H03K 19/0175 (20060101)

Expiration Date: 2020-04-08 0:00:00