Temperature/voltage detection circuit
AssigneeTaiwan Semiconductor Manufacturing Company, Ltd.
InventorsJaw-Juinn HORNG, Szu-Lin LIU, Chung-Hui CHEN
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Abstract
A circuit includes a comparator unit, a capacitive device, and a switching network. The comparator unit is configured to set a control signal at a first logical value when an output voltage reaches a first voltage value from being less than the first voltage value, and to set the control signal at a second logical value when the output voltage reaches a second voltage value from being greater than the second voltage. The capacitive device provides the output voltage. The switching network is configured to charge or discharge the capacitive device based on the control signal.
Claims20
A circuit comprising:
- a comparator unit configured to
- set a control signal at a first logical value when an output voltage reaches a first voltage value from being less than the first voltage value;
- and
- set the control signal at a second logical value when the output voltage reaches a second voltage value from being greater than the second voltage;
- a capacitive device providing the output voltage;
- and
- a switching network configured to charge or discharge the capacitive device based on the control signal.
A circuit comprising:
- a voltage divider, comprising a first output node, a second output node, and a third output node;
- a first switch selectively couple the voltage divider with a voltage source or a first current source;
- a capacitive device;
- a switching network configured to charge or discharge the capacitive device, hereby generating an output voltage value of the capacitive device;
- and
- a comparator unit comprising a first input coupled to one of the first output node or the second output node of the voltage divider, a second input coupled to the third output node of the voltage divider, and a third input configured to receive the output voltage value, the comparator unit being configured to cause the switching network to charge the capacitive device until the output voltage value reaches a first voltage value at the first input and to discharge the capacitive device until the output voltage value reaches a second voltage value at the second input.
A method comprising:
- selectively coupling a voltage source or a current source to the voltage divider by a switch;
- generating a first voltage value at a first output node of a voltage divider;
- generating a second voltage value at a second output node of the voltage divider;
- charging an output voltage of a capacitive device until the output voltage reaches the first voltage value when the voltage source is coupled to the voltage divider;
- and
- discharging the output voltage of the capacitive device until the output voltage reaches the second voltage value.
Dependencies are inferred from the claim text.