Current sense amplifier having bipolar common mode input range
US8633770B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 28, 2011 |
| Grant date | Jan 21, 2014 |
| Priority date | — |
| Expiry date | Nov 28, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45528
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplifier configuration including first and second amplifier inputs and a bias input adapted to receive a common mode signal indicative of a common mode input voltage. First and second amplifier input stage sections, each having first and second inputs coupled to respective ones of the first and second amplifier inputs, are provided. Operating mode circuitry switches the amplifier configuration between first and second operating modes in response to the common mode signal, where in the first operating mode the first and second amplifier input stage sections are active and inactive, respectfully and where in the second operating mode the first and second amplifier input stage sections are inactive and active, respectfully. The active first and second amplifier input stage sections are capable of operating with common mode voltages in excess of the upper and lower power supply rails, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.