Temperature-Compensated Voltage Supply for DRAM Signal Reliability
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Solution Overview
Problem
High temperatures degrade the transmission capability of functional circuits in DRAM due to thermal noise, leading to increased bit error rates and reduced operating frequency, necessitating a solution to maintain performance without altering transmission speed.
Innovation Solution
A power voltage supply device that includes a reference bias voltage generating circuit, a temperature compensation bias voltage generating circuit, and a compensation voltage generator, which selectively boosts the power voltage based on temperature changes to maintain optimal performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power voltage is increased to maintain transmission capability at high temperature, then the transmission capability is improved, but the power consumption increases
Solution Approach 1:
The power voltage is dynamically adjusted based on temperature conditions. The voltage supply device switches between a first power voltage (higher) for high-temperature operation to maintain transmission capability, and a second power voltage (lower) for low-temperature operation to reduce power consumption. This dynamic adjustment resolves the contradiction by adapting the voltage level to actual operational needs rather than maintaining a fixed high voltage.
Solution Approach 2:
The invention changes the power voltage parameter based on temperature conditions. By detecting temperature and switching between different voltage levels, the system optimizes the balance between transmission capability and power consumption. The parameter change allows the system to achieve high reliability when needed while minimizing energy usage during normal operation.
2Reliability
If the power voltage is increased to maintain transmission capability, then the bit error rate is reduced, but the system power consumption increases
Solution Approach 1:
The system dynamically adjusts power voltage based on temperature-induced noise conditions. At high temperatures where thermal noise increases bit error rates, the higher first power voltage is applied to maintain signal integrity. At lower temperatures where noise is minimal, the system switches to the lower second power voltage, reducing energy loss while maintaining acceptable error rates.
Solution Approach 2:
The invention converts the harmful effect of high temperature (increased thermal noise) into a controlled operational mode. By detecting temperature rise and automatically switching to higher voltage, the system compensates for noise-induced errors without manual intervention. This transforms the environmental challenge into an automated adaptive response that manages energy loss effectively.
3Device complexity
If a fixed power voltage is used, then the device complexity is low, but the transmission capability degrades at high temperature
Solution Approach 1:
The voltage supply device performs self-service by automatically detecting temperature conditions and adjusting its own output voltage. The temperature detection unit monitors environmental temperature, and the voltage switching unit autonomously selects appropriate voltage levels without external control. This self-regulating mechanism maintains transmission capability at high temperatures while adding minimal complexity compared to manual adjustment systems.
Solution Approach 2:
The system implements feedback control through temperature detection. The temperature detection unit provides real-time temperature information to the voltage switching unit, which adjusts the power voltage accordingly. This feedback loop ensures transmission capability is maintained at high temperatures while keeping the control mechanism relatively simple, as it only requires basic temperature sensing and voltage switching logic.
Data Source
AI summary
A power voltage supply device, including a reference bias voltage generating circuit, a temperature compensation bias voltage generating circuit, a compensation voltage generator, and a voltage buffer, is provided. The reference bias voltage generating circuit generates a reference bias voltage. The temperature compensation bias voltage generating circuit generates a temperature compensation bias voltage that changes as temperature rises. The compensation voltage generator generates a first power voltage based on the reference bias voltage, and selectively boosts the first power voltage based on the temperature compensation bias voltage. An input terminal of the voltage buffer receives the first power voltage. The voltage buffer generates a second power voltage corresponding to the first power voltage to a load circuit.