| US 7,468,615 B1 | ||
| Voltage level shifter | ||
| Jian Tan, Fremont, Calif. (US); and Qi Zhang, Milpitas, Calif. (US) | ||
| Assigned to Xilinx, Inc., San Jose, Calif. (US) | ||
| Filed on Mar. 28, 2007, as Appl. No. 11/729,201. | ||
| Int. Cl. H03K 19/094 (2006.01); H03K 19/0175 (2006.01); H03L 5/00 (2006.01) | ||
| U.S. Cl. 326—68 [327/333] | 16 Claims |
| 16. An integrated circuit, comprising:
a current mirror circuit powered by a first voltage;
a differential input circuit;
a protection circuit coupled between the current mirror circuit and the differential input circuit;
a disable terminal coupled to the protection circuit;
an input terminal coupled to a first control of the differential input circuit;
an inverter coupled between the input terminal and a second control of the differential input circuit, wherein the inverter
is powered by a second voltage;
an output circuit having inputs coupled to a first branch of the current mirror circuit and the disable terminal; and
a capacitor coupled between the input terminal and a second branch of the current mirror circuit.
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