Low power reconfigurable circuits with delay compensation
First Claim
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1. A circuit comprising:
- a semiconductor device having a plurality of logic blocks and a plurality of programmable interconnects;
a delay detector for generating a delay signal responsive to a measured delay of an output signal, wherein the output signal is from at least one of the plurality of logic blocks, anda biasing circuit responsive to the delay signal to adjust a subsequently measured delays toward a predetermined value.
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Abstract
According to one aspect of the present disclosure, a circuit includes a semiconductor device including a plurality of logic blocks and a plurality of programmable interconnects. A delay detector generates a delay signal responsive to a measured delay of an output signal, wherein the output signal is from at least one of the plurality of logic blocks. A biasing circuit responsive to the delay signal to adjust subsequent measured delays toward a predetermined value.
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Citations
27 Claims
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1. A circuit comprising:
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a semiconductor device having a plurality of logic blocks and a plurality of programmable interconnects; a delay detector for generating a delay signal responsive to a measured delay of an output signal, wherein the output signal is from at least one of the plurality of logic blocks, and a biasing circuit responsive to the delay signal to adjust a subsequently measured delays toward a predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A low power circuit comprising:
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a field programmable gate array circuit including a reference block, wherein the reference block produces a reference output signal, wherein the reference output signal; is a sub-threshold leakage current or voltage; and includes a reference output signal phase, a phase detector adapted to determine a delay by comparing the reference output signal phase to a reference delay signal; and a charge pump responsive to an indication of the delay to bias the reference output signal toward the reference delay signal. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method comprising the steps of:
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operating a reference block within a field programmable gate array circuit at a sub-threshold level to produce an output, wherein the output has an output delay; and dynamically biasing a portion of the FPGA to increase or decrease the output delay toward a predetermined delay. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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Specification