Patent ID: 7471135
Filing Date: 2008-12-30
Classification: G11C,H03K

Abstract:
1. A multiplexer circuit comprising a plurality of pass devices coupled in parallel between a power supply and a ground supply, each pass device comprising: a first pair of transistors, comprising a low voltage pass transistor coupled in series with a high voltage pass transistor between the power supply and the ground supply, wherein the first pair of transistors are configured for passing a current there through; and a second pair of native transistors coupled to gate terminals of the first pair of transistors for increasing the current by increasing a pair of voltages supplied to the first pair of transistors in response to a pair of control signals applied to the second pair of transistors; and a discharge circuit coupled in parallel with the first pair of transistors between the power supply and ground, wherein when activated by a discharge signal, the discharge circuit is configured for discharging a drain terminal of the low voltage pass transistor to ground.