High precision voltage regulation circuit for programming multiple bit flash memory

A computer system comprising:

• a power supply for providing an operating voltage;
• a solid state hard drive for storing data and for emulating a magnetic hard disk drive, the solid state hard drive comprising:
• a DC-to-DC converter coupled to receive the operating voltage, the DC-to-DC converter for outputting a programming voltage level;
• a nonvolatile memory device coupled to receive the programming voltage level, the nonvolatile memory device including a programming voltage regulation circuit for supplying a gate voltage to program a nonvolatile memory cell, the programming voltage regulation circuit comprising:
• a sample and hold circuit coupled to programming voltage level, the sample and hold circuit for sampling the programming voltage level and for holding a reference voltage generated in response to the programming voltage level, the sample and hold circuit including a capacitor that holds the reference voltage;
• and
• a regulator circuit coupled to the capacitor of the sample and hold circuit, the regulator circuit for outputting the gate voltage using the reference voltage supplied by the capacitor.

A computer system comprising:

• a power supply for providing an operating voltage;
• a memory card for storing data, the memory card comprising:
• a DC-to-DC converter coupled to receive the operating voltage, the DC-to-DC converter for outputting a programming voltage level;
• a nonvolatile memory device coupled to receive the programming voltage level, the nonvolatile memory device including a programming voltage regulation circuit for supplying a gate voltage to program a nonvolatile memory cell, the programming voltage regulation circuit comprising:
• a sample and hold circuit coupled to programming voltage level the sample and hold circuit for sampling the programming voltage level, and for holding a reference voltage generated in response to the programming voltage level, the sample and hold circuit including a capacitor that holds the reference voltage;
• and
• a regulator circuit coupled to the capacitor of the sample and hold circuit, the regulator circuit for outputting the gate voltage using the reference voltage supplied by the capacitor.