| US 7,457,090 B2 | ||
| Use of a known common-mode voltage for input overvoltage protection in pseudo-differential receivers | ||
| Todd A. Randazzo, Colorado Springs, Colo. (US) | ||
| Assigned to LSI Corporation, Milpitas, Calif. (US) | ||
| Filed on Nov. 12, 2004, as Appl. No. 10/988,122. | ||
| Prior Publication US 2006/0103999 A1, May 18, 2006 | ||
| Int. Cl. H02H 3/20 (2006.01); H02H 9/04 (2006.01) | ||
| U.S. Cl. 361—91.1 | 17 Claims |
| 1. A method comprising:
receiving a transmitted pseudo-differential signal from a data bus at input pins of an integrated circuit, the pseudo-differential
signal comprising a true signal and a reference voltage, which were transmitted together over the data bus from a first location
to the integrated circuit;
generating a protection voltage on the integrated circuit from the reference voltage such that an increase in the reference
voltage causes an increase in the protection voltage and a decrease in the reference voltage causes a decrease in the protection
voltage;
limiting the true signal to the protection voltage to produce a protected true signal; and
applying the protected true signal and the reference voltage to a receiver on the integrated circuit.
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