| 摘要 |
A method and apparatus for reading data bits stored on a storage medium is provided. The apparatus comprises a data probe structure including a data probe and at least one switch attached to the data probe, a controllable voltage source configured to supply voltage to the data probe structure, and a charge amplification structure configured to receive charge from the data probe structure. The controllable voltage source applies a first voltage to the data probe structure and subsequently applies a second voltage to the data probe structure, thereby causing a sense capacitance to charge and then discharge into the charge amplification structure. Certain embodiments of the design may employ dummy cells, diodes in place of switches, and may use a single line to control voltage switching. A lock-in amplifier approach is also presented.
|
