Patent ID: 6844770

Claim:
An input buffer circuitry that connects low power circuitry to high power circuitry wherein said low power circuitry operates at first voltage and said high power circuitry operates at a second voltage that is greater than said first voltage comprising: an input that receives signals at said second voltage from said high power circuitry; pinch-off circuitry that receives said signals and prevents voltage above a threshold voltage from being applied to an output of said pinch-off circuitry wherein said pinch-off circuitry includes a first pinch-off transistor and a second pinch-off transistor and wherein said first pinch-off transistor and said second pinch-off transistor are n-channel transistors; boost circuitry that controls said threshold voltage of said pinch-off circuitry; and pull-up circuitry that connects to said output of said pinch-off circuitry to draw current from said output of said pinch-off circuitry.