Speed-up circuit for initiation of proportional to absolute temperature biasing circuits
US7224209B2 · kind B2 · utility
23Cited by
28References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 3, 2005 |
| Grant date | May 29, 2007 |
| Priority date | — |
| Expiry date | Jul 6, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/30
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A PTAT biasing circuit for use in a bandgap referenced voltage source includes a startup sub-circuit. Prior to activation of a power up indication signal, the speedup circuit forces the PTAT biasing circuit from a degenerate operating point to a normal operating point. Upon detection of a feedback signal denoting the initiation of the PTAT biasing circuit, the startup sub-circuit terminates operation of the startup sub-circuit independent of the activation of the power up indication signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.