Sense Amplifier Circuit for Memory Cell Data Detection
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Solution Overview
Problem
Current sense amplifier circuits consume high current due to both the potential control unit and current amplifier unit being in an ON state during memory readout, which is not suitable for long cycle readouts that require lower power consumption.
Innovation Solution
A sense amplifier circuit with a potential control unit, a current amplifier unit, and a detection unit that controls the bit line potential and amplifies the readout current only during the current amplification duration, allowing the current amplifier unit to be in an inactive state during parts of the readout cycle to reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the current amplifier unit is activated to amplify the readout current, then the detection precision is improved, but the current consumption increases
Solution Approach 1:
The current amplifier unit is activated only during the current amplification duration within the readout cycle, rather than continuously. This periodic activation allows the amplifier to perform its function of amplifying the readout current for accurate detection only when needed, while remaining inactive during other periods to reduce current consumption.
Solution Approach 2:
The invention dynamically controls the activation state of the current amplifier unit based on the timing within the readout cycle. The amplifier unit transitions between active and inactive states according to the readout timing signal, optimizing the balance between detection precision and power consumption by being active only during the necessary amplification window.
2Reliability
If both the potential control unit and current amplifier unit are in ON state during memory readout, then the data detection capability is improved, but the current consumption increases
Solution Approach 1:
The invention implements periodic control where the current amplifier unit is activated only during the current amplification duration of the readout cycle. This timing-based control ensures that both units work together to provide reliable data detection only when necessary, while reducing overall current consumption by keeping the amplifier unit inactive during other portions of the readout cycle.
Solution Approach 2:
The potential control unit prepares the bit line potential in advance during the readout cycle, and the current amplifier unit is activated at the appropriate time to amplify the readout current. This coordinated timing ensures that detection capability is maintained when needed while minimizing power consumption through selective activation.
Data Source
AI summary
Provided is a sense amplifier circuit for detecting data having been read from a memory cell. The sense amplifier circuit includes: a potential control unit for controlling the potential of a bit line connected to a memory cell; a current amplifier unit for amplifying a readout current flowing from the memory cell to the bit line so as to produce an amplified current; and a detection unit for detecting data having been read from the memory cell on the basis of the amplified current. The potential control unit controls the potential of the bit line in a data readout duration, and the data readout duration includes a current amplification duration, and the current amplifier unit amplifies the readout current in the current amplification duration.