Patent ID: 7995449
Filing Date: 2011-08-09
Classification: H03F

Abstract:
1. A system of sampling interface for an optical pick-up head, said system comprising: said optical pick-up head for outputting one of a reading voltage and a writing voltage; a first P-TYPE Metal Oxide Semiconductor device (PMOS) comprising a first source/drain, a first PMOS gate and a substrate, and wherein said first source/drain is for receiving one of said reading voltage and said writing voltage, and said first PMOS gate receives a gate voltage for turning on a path between said first source/drain of said first PMOS and a second source/drain of said first PMOS, and said substrate receives a control voltage; a boost circuit connecting with said first PMOS gate for boosting said gate voltage up to higher than said control voltage and turning off a path between said first source/drain and said second source/drain so as to block said writing voltage; and a sample and hold circuit connecting with said second source/drain for sampling and holding said reading voltage.