Patent ID: 7002822
Filing Date: 2006-02-21
Classification: G11C

Abstract:
1. A ternary content addressable memory (TCAM) device comprising: A plurality of TCAM cells for storing data, each TCAM cell having two memory cells and a comparison circuit for comparing data stored in the memory cells with data input on a search line pair connected to the comparison circuit, wherein the comparison circuit comprises first, second, third, and forth NMOS transistors, the first and second NMOS transistors having their drains connected to a match line, their gates connected to the memory cells and their source connected to drains of the third and forth NMOS transistors, and the third and forth NMOS transistors having their gates connected to the search line pair and their source connected directly to ground, further including a precharge circuit connected directly to the search line pair for discharging each line of the search line pair to ground upon indication that at least one of the memory cells connected thereto are defective.