Analog Devices Technology

George R Spalding

Naiqian Ren

Michael Edward Bradley

Finbarr O'Leary

Nigel David Brooke

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 Vrefis provided at a third node and a voltage Vrefreferenced to Vrefis at a fourth node. A hysteresis hystis switchably connected between the third and first nodes, and a hysteresis hystis switchably connected between the fourth and second nodes. Hystand hystare 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.

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Edinburgh, United Kingdom

George R Spalding