Power cycling power on reset circuit for fuse initialization circuitry
US8963590B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 2009 |
| Grant date | Feb 24, 2015 |
| Priority date | — |
| Expiry date | Feb 19, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/223
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A system for initializing circuitry is presented. The system employs a power-on reset circuit having a threshold voltage and a programmable switch circuit. The power-on reset circuit has a detector circuit for detecting a reference voltage, and a one-sided latch for generating an output voltage reflective of the reference voltage. The detector circuit has a threshold after which the one-sided latch is activated. The programmable switch circuit receives the output voltage of the power-on reset circuit and generates an enable signal and its complement based on the status of an internal fuse. The switch point of the power-on reset circuit provides for a rapid increase in output voltage that offsets parasitic leakage current in the programmable switch circuit that can result in improper enable signal output. A high resistance direct path to ground on an output node of the power-on reset circuit prevents residual charge from causing an undesired misfire.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.