Memory Bus Circuit Voltage Regulation
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Solution Overview
Problem
Conventional memory device support circuits require high-power voltage regulators that consume significant energy, occupy large areas, and are challenging to implement in smaller packages due to the need for low resistance routing, which affects the accuracy of voltage regulation and is difficult to achieve with low power requirements.
Innovation Solution
The proposed bus circuit employs a low-power regulator that allows voltages to 'float' and utilize loading capacitors to anticipate and cancel coupling effects, eliminating the need for high-power regulators and reducing the footprint and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-power voltage regulators are used to maintain voltage accuracy, then voltage regulation precision is improved, but power consumption increases and device area increases
Solution Approach 1:
The patent applies preliminary action by pre-charging capacitors connected to bit lines and word lines before memory operations. This pre-charging anticipates the voltage drops that will occur during read/write operations, eliminating the need for high-power regulators to continuously maintain voltage. The capacitors are charged in advance to specific voltage levels that compensate for expected voltage variations during operation.
Solution Approach 2:
The patent uses capacitors to create voltage copies or representations of the supply voltage at critical points in the circuit. These capacitive voltage copies are maintained at predetermined levels and provide local voltage reference points that eliminate the need for continuous high-power regulation. The capacitors effectively copy and hold voltage levels locally without requiring continuous power delivery from high-power regulators.
2Measurement precision
If high-power voltage regulators are used to maintain voltage accuracy, then voltage regulation precision is improved, but device area increases
Solution Approach 1:
The patent applies preliminary action by pre-charging capacitors connected to bit lines and word lines before memory operations. This pre-charging anticipates the voltage drops that will occur during read/write operations, eliminating the need for high-power regulators to continuously maintain voltage. The capacitors are charged in advance to specific voltage levels that compensate for expected voltage variations during operation.
Solution Approach 2:
The patent uses capacitors to create voltage copies or representations of the supply voltage at critical points in the circuit. These capacitive voltage copies are maintained at predetermined levels and provide local voltage reference points that eliminate the need for continuous high-power regulation. The capacitors effectively copy and hold voltage levels locally without requiring continuous power delivery from high-power regulators.
3Measurement precision
If low resistance routing is used to support high-power regulators, then voltage regulation accuracy is improved, but routing complexity and area increase
Solution Approach 1:
The patent applies preliminary action by pre-charging capacitors connected to bit lines and word lines before memory operations. This pre-charging anticipates the voltage drops that will occur during read/write operations, eliminating the need for high-power regulators to continuously maintain voltage. The capacitors are charged in advance to specific voltage levels that compensate for expected voltage variations during operation.
Solution Approach 2:
The patent uses capacitors to create voltage copies or representations of the supply voltage at critical points in the circuit. These capacitive voltage copies are maintained at predetermined levels and provide local voltage reference points that eliminate the need for continuous high-power regulation. The capacitors effectively copy and hold voltage levels locally without requiring continuous power delivery from high-power regulators.
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 achieves high accuracy in voltage regulation with smaller routing requirements and lower power consumption, enabling more efficient and compact memory device designs.
Implementation Method 1
a capacitor having a first terminal coupled to the gate terminal of the first transistor and having a second terminal coupled to a reference voltage
Data Source
AI summary
Embodiments of bus circuits and related techniques are disclosed herein. In some embodiments, a bus circuit may include: a source follower arrangement, including a first transistor and a second transistor, coupled between a supply voltage and an access line of a memory cell, wherein the first transistor and the second transistor each have a gate terminal and wherein the access line is a bit line or a word line; a capacitor having a first terminal coupled to the gate terminal of the first transistor and having a second terminal coupled to a reference voltage; and a switch coupled between the first terminal of the capacitor and a voltage regulator. Other embodiments may be disclosed and/or claimed.