Level shifting circuit with adaptive feedback
US9000826B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 2014 |
| Grant date | Apr 7, 2015 |
| Priority date | — |
| Expiry date | May 19, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/018528
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplifier has a first pull-up path coupled between a voltage supply node and an output node, and a pull-down path coupled between the output node and a ground supply node. A second pull-up path is coupled between the voltage supply node and the output node. The second pull-up path is actuated by a feedback signal and biased by a biasing signal. An inverter circuit is operable to invert the signal at the amplifier output node to generate the feedback signal. A biasing circuit is configured to generate the biasing signal. The biasing circuit is configured to control a relative strength of the pull-down path to the second pull-up path, wherein the pull-down path is stronger than the second pull-up path in a manner that is consistently present over all PVT corners.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.