Analog power-up reset circuit for logic level reset
AssigneeROLLS-ROYCE plc
InventorJohn Joseph Costello
Life of this patent
Estimating the term…
Abstract
An electrical reset circuit is configured to generate a reset pulse to reset one or more electrical components. The electrical reset circuit includes a first device electrically connected between a power supply input and a first node. The first device is configured to conduct current after the power supply input reaches a first voltage threshold. The electrical reset circuit also includes a second device electrically connected between the power supply input and a second node, where the second device is configured to conduct current after the power supply input reaches a second voltage threshold. In some examples, the electrical circuit includes a delay circuit configured to delay the reset pulse. Corresponding methods to providing a reset pulse are also contemplated.
Claims11
An electrical reset circuit configured to generate a reset pulse, comprising:
- a first device electrically connected between a power supply input and a first node, wherein the first device is configured to conduct current after the power supply input reaches a first voltage threshold;
- a first resistor electrically connected between the first node and a common node;
- a second device electrically connected between the power supply input and a second node, wherein the second device is configured to conduct current after the power supply input reaches a second voltage threshold;
- a first capacitor electrically connected between the second node and the common node;
- a second resistor electrically connected in parallel with the first capacitor;
- a first transistor electrically connected between a power rail and the common node, wherein the gate of the first transistor is electrically connected to the first node;
- and
- a second transistor electrically connected between the first node and the common node, wherein the gate of the second transistor is electrically connected to the second node.
Dependencies are inferred from the claim text.