TSPC NAND Reset Flip-Flop With Two-Transistor Reset
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Solution Overview
Problem
Conventional flip-flop circuits require significant circuit area and power consumption to implement reset functionality, often using four or more transistors which increases area and power usage.
Innovation Solution
A True Single-Phase Clock (TSPC) NAND-based reset flip-flop design that utilizes only two transistors to achieve reset functionality, reducing area and power consumption by employing a master and slave section with NAND stages and transistors configured to receive and process data, scan, and clock signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional flip-flop circuits use four or more transistors to implement reset functionality, then the reset operation can be performed reliably, but the circuit area and power consumption increase
Solution Approach 1:
The patent merges the reset functionality with the existing flip-flop structure by integrating reset transistors into the master and slave sections. The reset transistors share control terminals with the clock signal pathway, allowing reset operation to be performed by controlling the same transistors that handle clock signals, thereby eliminating the need for separate dedicated reset transistor circuits.
Solution Approach 2:
The flip-flop circuit is designed so that the same transistor structures serve multiple functions: they handle both clock signal transmission and reset operations. The master section transistors and slave section transistors are configured to respond to both clock edges and reset signals, making the circuit elements universal rather than specialized for single functions.
2Reliability
If conventional flip-flop circuits use four or more transistors to implement reset functionality, then the reset operation can be performed reliably, but the power consumption increases
Solution Approach 1:
The patent merges the reset functionality with the existing flip-flop structure by integrating reset transistors into the master and slave sections. The reset transistors share control terminals with the clock signal pathway, allowing reset operation to be performed by controlling the same transistors that handle clock signals, thereby eliminating the need for separate dedicated reset transistor circuits.
Solution Approach 2:
The flip-flop circuit is designed so that the same transistor structures serve multiple functions: they handle both clock signal transmission and reset operations. The master section transistors and slave section transistors are configured to respond to both clock edges and reset signals, making the circuit elements universal rather than specialized for single functions.
3Area of stationary object
If the transistor count is reduced to two for reset functionality, then the circuit area and power consumption are reduced, but the circuit complexity must be optimized
Solution Approach 1:
The patent divides the flip-flop circuit into distinct master and slave sections, each with specific transistor configurations. The master section contains transistors that respond to clock rising edges and reset signals, while the slave section contains transistors that respond to clock falling edges. This segmentation allows each section to be optimized independently with minimal transistor count while maintaining overall functionality.
Solution Approach 2:
The circuit employs dynamic control where transistors are switched on and off based on clock phases and reset signals. The master section is active during one clock phase while the slave section is active during the other phase, creating a dynamic operation mode that reduces the need for static redundant transistors while maintaining reliability.
Data Source
AI summary
A True Single-Phase Clock (TSPC) NAND-based reset flip-flop includes a reset functionality to perform a reset operation. The flip-flop with the reset functionality includes a master section and a slave section. The reset functionality is achieved using two transistors in the master section. The master section and the slave section operate using the TSPC. The master section and the slave section may include a plurality of NAND circuits and a NAND and NOR circuit for performing the reset operation. The master section outputs a plurality of internal signals on receiving a data input, a scan enable signal, a scan input signal, a reset control signal, and a clock signal. The slave section generates an output on receiving the plurality of internal signals received from the master section.