Amplifier Input Switching for Temperature-Dependent Reference Voltages
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Solution Overview
Problem
Existing memory devices face performance degradation and operational failures due to the use of fixed or variable reference voltages across different process corners, temperature, and voltage ranges, leading to transistors operating in sub-threshold regions or with undesirably low drain-source voltage.
Innovation Solution
Incorporating different types of transistors at various process corners, each coupled with specific switches, to selectively activate based on temperature-dependent or independent voltage profiles, ensuring adequate drain-source voltage and preventing sub-threshold operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed reference voltage is used across all process corners and temperature ranges, then device complexity is reduced, but transistor operation becomes unreliable with sub-threshold operation and low drain-source voltage
Solution Approach 1:
The reference voltage is changed from a fixed value to a dynamically adjustable parameter that varies based on process corner and temperature conditions. The circuit selectively activates different reference voltage sources (first reference voltage for slow-slow corner, second reference voltage for fast-fast corner) based on operational conditions, allowing the system to adapt to changing environmental parameters while maintaining reliable transistor operation.
Solution Approach 2:
The invention changes the parameter values of reference voltages based on process corners and temperature ranges. By providing different reference voltage values (first reference voltage and second reference voltage) for different process corners (slow-slow, fast-fast), the system optimizes transistor operation for each specific condition, preventing sub-threshold operation and ensuring adequate drain-source voltage margins.
2Reliability
If different types of transistors and switches are incorporated for different process corners, then transistor operation reliability is improved, but device complexity increases
Solution Approach 1:
The circuit is segmented into different operational paths for different process corners. Separate transistor pairs (first pair and second pair) and corresponding switches are provided for slow-slow and fast-fast process corners. This segmentation allows each segment to be optimized for its specific process corner while maintaining overall system reliability through selective activation based on operating conditions.
Data Source
AI summary
Methods, systems, and devices for configurable input for an amplifier are described. In some examples, a circuit may be configured to operate based on a signal having a first voltage profile or a second voltage profile. For example, the first voltage profile may be associated with a range of voltages that are based on a temperature of an associated memory chip, and the second voltage profile may be associated with a voltage (or voltages) that are not associated with the temperature of the memory chip. The circuit may include one or more transistors and switches that are activated based on the voltage profile and a switch receiving a particular control signal. In some instances, the control signal may be received based on a value stored to one or more non-volatile memory elements.