Digital retention voltage generation
AssigneeTaiwan Semiconductor Manufacturing Company, Ltd.
InventorsJack Liu, Shao-Yu Chou, Wei Min Chan
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Abstract
A first embodiment of the present invention is a system for generating a voltage comprising a comparator operable to compare an operation voltage to a reference voltage, control logic operable to selectively output as a control signal an incremented signal or a decremented signal based on a comparison of the operation voltage to the reference voltage by the comparator, and a device module operable to increase or decrease the operation voltage based on the control signal.
Claims17
A system for generating a voltage, the system comprising:
- a comparator configured to compare an operation voltage to a reference voltage;
- control logic configured to selectively output as a control signal an incremented signal or a decremented signal based on a comparison of the operation voltage to the reference voltage by the comparator, the incremented signal or the decremented signal being an incremented or decremented version, respectively, of the control signal from a previous time period, the control logic being further configured to enter a lock state to prevent the control logic from changing the control signal based on a first condition;
- and
- a device module configured to increase or decrease the operation voltage based on the control signal.
A system comprising:
- a comparator configured to compare an operation voltage to a reference voltage;
- control logic configured to selectively output as a control signal an incremented signal or a decremented signal based on a comparison of the operation voltage to the reference voltage by the comparator, the incremented signal or the decremented signal being an incremented or decremented version, respectively, of the control signal from a previous time period;
- a device module configured to increase or decrease the operation voltage based on the control signal;
- and
- a static random access memory (SRAM) electrically coupled to the device module, wherein a voltage between the SRAM and the device module is the operation voltage.
A system for generating a voltage, the system comprising:
- a digital comparator that compares a first voltage to a reference voltage;
- a control unit comprising digital control logic that outputs a control signal during a current clock cycle, wherein the control signal comprises an incremented or a decremented version of the control signal from a previous clock cycle, the control unit further comprising additional digital control logic that locks the control signal when a first condition occurs;
- and
- a device module that operates to selectively turn on or turn off based on the control signal, wherein by turning on or turning off, the first voltage is altered.
A method for generating a voltage, the method comprising:
- turning device modules on to initiate an operation voltage when a first mode starts;
- comparing the operation voltage to a reference voltage;
- incrementing or decrementing a control signal from a previous time period based on the comparing;
- selectively turning on or off at least one device module when the control signal is incremented or decremented to alter the operation voltage;
- and
- entering a lock state when a first condition occurs, wherein no device module is turned on or turned off during the lock state.
Dependencies are inferred from the claim text.