Patent ID: 8981857
Filing Date: 2015-03-17
Classification: G04F,G04G,G06F,G11C,H03K,Y02D

Abstract:
1. A circuit with a temperature dependent timer comprising: a comparator including a first input, a second input, and an output, the output to provide a timer signal during operation; a transistor including a first current terminal and a control terminal, the first current terminal coupled to the second input of the comparator; a first node coupled to the first input of the comparator; a second node coupled to the second input of the comparator and the first current terminal of the transistor; a third node coupled to the control terminal of the transistor; wherein during operation, the third node is biased to place the transistor in a subthreshold region of operation to change a voltage of the second node at a rate dependent upon temperature, the output of the comparator changes state when the voltage of the second node crosses a voltage of the first node.