Trap Circuits in Resonant Clock Networks to Reduce Crosstalk
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Solution Overview
Problem
CMOS technology-based digital circuits face limitations in device size and suffer from high power consumption due to leakage currents and the need to maintain transistor states, even when inactive.
Innovation Solution
The development of a superconducting integrated circuit using Josephson junctions and capacitors, coupled with trap circuits to attenuate signals and reduce crosstalk, operates with alternating current (AC) power and employs differential capacitively-coupled resonant clock networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If CMOS technology is used for digital circuits, then device integration is achieved, but power consumption increases due to leakage currents and transistor state maintenance
Solution Approach 1:
The patent transitions from CMOS technology operating at DC voltage to superconducting logic operating at AC clock signals. This parameter change fundamentally alters the operating mode from static DC power consumption to dynamic AC-powered operation, eliminating leakage currents while maintaining device integration capability
Solution Approach 2:
The patent replaces the DC voltage-based CMOS switching mechanism with an AC clock signal-based superconducting logic mechanism. This substitution eliminates the need for continuous DC power to maintain transistor states, as superconducting circuits naturally maintain their state without continuous power input
2Object-generated harmful factors
If trap circuits are added to reduce crosstalk, then signal attenuation is improved, but device complexity increases
Solution Approach 1:
The patent introduces trap circuits as intermediary elements between adjacent superconducting logic circuits. These trap circuits act as mediators that absorb and dissipate unwanted signal energy, preventing crosstalk without requiring fundamental changes to the main logic circuit architecture
Solution Approach 2:
The patent divides the circuit into functional segments: main superconducting logic circuits and separate trap circuits. This segmentation allows the trap circuits to be added independently to address crosstalk issues without redesigning the entire logic circuit, thereby managing complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly reduces power consumption and crosstalk, enhancing the performance and efficiency of digital circuits by leveraging the low-power characteristics of superconductor logic.
Implementation Method 1
a first Josephson junction coupled via a first capacitor to a first clock line, where the first capacitor is configured to receive a first clock signal having a first phase via the first clock line and couple a first bias current to the first Josephson junction
Implementation Method 2
a first capacitor coupled to the first Josephson junction and configured to receive the first clock signal having the first phase and couple a first bias current to the first Josephson junction
Implementation Method 3
a first trap circuit coupled between the first capacitor and the first Josephson junction, where the first trap circuit is configured to attenuate any signals generated by a triggering of the first Josephson junction
Data Source
AI summary
Trap circuits for use with superconducting integrated circuits having differential capacitively-coupled resonant clock networks are described. An example superconducting integrated circuit (IC) includes a first superconducting circuit comprising: (1) a first Josephson junction (JJ) coupled via a first capacitor to a first clock line, where the first capacitor is configured to receive a first clock signal having a first phase via the first clock line and couple a first bias current to the first JJ, and (2) a second JJ coupled via a second capacitor to a second clock line, where the second capacitor is configured to receive a second clock signal having a second phase via the second clock line and couple a second bias current to the second JJ. The superconducting IC further includes a first trap circuit for the first superconducting circuit and a second trap circuit for a second superconducting circuit having additional JJs.