公开(公告)号：US08823419B1

公开(公告)日：2014-09-02

申请号：US13792835

申请日：2013-03-11

Applicant: Analog Devices Technology

Inventor： Finbarr O'Leary ,  Michael Edward Bradley ,  Naiqian Ren ,  George R. Spalding ,  Nigel David Brooke

IPC: H03K5/153

CPC classification number: H03K5/22

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.

Abstract translation: 乒乓比较器电压监视电路，其包括具有连接到要监视的电压Vin的输入的第一和第二比较器，以及分别连接到第一和第二节点的第二输入。 复用器响应于周期性控制信号将第一和第二比较器输出交替耦合到输出。 在第三节点处提供地参考电压Vref1，并且参考Vref1的电压Vref2在第四节点处。 迟滞hyst1可切换地连接在第三节点和第一节点之间，并且滞后hyst2可切换地连接在第四节点和第二节点之间。 当Mux输出由于Vin上升而切换时，Hyst1和hyst2被切换，并且当多路复用器输出由于Vin下降而切换时，Hyst1和hyst2被切换。

公开(公告)号：US20140253176A1

公开(公告)日：2014-09-11

申请号：US13792835

申请日：2013-03-11

Applicant: ANALOG DEVICES TECHNOLOGY

Inventor： Finbarr O'Leary ,  Michael Edward Bradley ,  Naiqian Ren ,  George R. Spalding ,  Nigel David Brooke

IPC: H03K5/22

CPC classification number: H03K5/22

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.

Abstract translation: 乒乓比较器电压监视电路，其包括具有连接到要监视的电压Vin的输入的第一和第二比较器，以及分别连接到第一和第二节点的第二输入。 复用器响应于周期性控制信号将第一和第二比较器输出交替耦合到输出。 在第三节点处提供地参考电压Vref1，并且参考Vref1的电压Vref2在第四节点处。 迟滞hyst1可切换地连接在第三节点和第一节点之间，并且滞后hyst2可切换地连接在第四节点和第二节点之间。 当Mux输出由于Vin上升而切换时，Hyst1和hyst2被切换，并且当多路复用器输出由于Vin下降而切换时，Hyst1和hyst2被切换。