Ping pong comparator voltage monitoring circuit
US8823419B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 2013 |
| Grant date | Sep 2, 2014 |
| Priority date | — |
| Expiry date | Mar 11, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K5/22
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A ping pong comparator voltage monitoring circuit which includes first and second comparators having inputs connected to a voltage Vin to be monitored, and second inputs connected to first and second nodes, respectively. A multiplexer alternately couples the first and second comparator outputs to an output in response to a periodic control signal. A ground-referenced voltage Vref1 is provided at a third node and a voltage Vref2 referenced to Vref1 is at a fourth node. A hysteresis hyst1 is switchably connected between the third and first nodes, and a hysteresis hyst2 is switchably connected between the fourth and second nodes. Hyst1 and hyst2 are switched in when the mux output toggles due to a rising Vin, and are switched out when the mux output toggles due to a falling Vin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.