A process friendly precision voltage generator for use in a digital/analog system or the like, includes a modified phase lock loop (MPLL) and a frequency control system for adjusting the frequency of the MPLL until a desired reference voltage is obtained at an output node of the loop filter. The frequency...http://www.google.ca/patents/US6288602?utm_source=gb-gplus-sharePatent US6288602 - CMOS on-chip precision voltage reference scheme
