Systems and methods that employ inductive current steering for digital logic circuits
First Claim
1. A shift register that employs inductive current switching, comprising:
- a plurality of flip-flops that comprises of a plurality of data latches connected in series; and
a transformer based clock bus that comprises of at least one transformer for each respective transistor of the plurality of data latches, respective transformers provide inductive current to respective transistors and the inductive current defines the state of the respective flip-flops.
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Accused Products
Abstract
The present invention provides systems and methods that utilize inductive current steering to improve logic circuit performance by mitigating propagation delays associated with conventional transistor current steering. The system and methods employ RF transformers, wherein energizing primary windings induce current in associated secondary windings. In one aspect, a single clock bus is employed to induce the current, which is routed via respective ends of the secondary winding to emitter leads of the transistors. This current and voltage is 180 degrees out-of-phase such that one transistor is “on” while the other is “off,” which generates a differential output. In another aspect, a differential clock signal is employed to induce the current in secondary windings and associated transistor emitters. Further, the systems and methods can be utilized to construct flip-flops and shift registers by coupling differential transistor pairs and driving these pairs with the transformer-based single-ended or differential clock.
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Citations
20 Claims
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1. A shift register that employs inductive current switching, comprising:
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a plurality of flip-flops that comprises of a plurality of data latches connected in series; and a transformer based clock bus that comprises of at least one transformer for each respective transistor of the plurality of data latches, respective transformers provide inductive current to respective transistors and the inductive current defines the state of the respective flip-flops. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An inductive current-based data latching method, comprising:
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coupling at least two data latches in series; employing a transformer based clock bus that induces current; and routing the induced current to the at least two data latches to track and hold data within the data latches. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A shift register, comprising:
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means for receiving a clock signal; means for generating an inductive current based on the clock signal; and means for steering the inductive current through the differential transistor pair in order to effectuate the output state of the differential transistor pair; means for employing the output of the differential transistor pair to track and hold data. - View Dependent Claims (19, 20)
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Specification