Clock Signal Generator with Temperature-Linear Cycle Control
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Solution Overview
Problem
Semiconductor memory devices face challenges in maintaining clock signal cycle linearity across a wide temperature range, affecting operations such as programming, reading, and erasing due to temperature-dependent clock signal cycles.
Innovation Solution
A clock signal generator is designed with a power voltage providing circuit that adjusts voltage based on a temperature coefficient, a reference voltage controller that provides a temperature-insensitive reference voltage, and a clock signal generating circuit that generates a clock signal with a cycle proportional to the power voltage level, ensuring linear changes with temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional clock signal generator is used, then the device can operate across a wide temperature range, but the clock signal cycle becomes non-linear with temperature changes
Solution Approach 1:
The patent changes the parameter of power voltage to compensate for temperature effects. The power voltage providing circuit adjusts the power voltage level based on temperature coefficient, which in turn adjusts the clock signal cycle to maintain linearity with temperature changes, resolving the contradiction between operational reliability and cycle linearity.
Solution Approach 2:
The patent implements a feedback mechanism where the power voltage providing circuit uses temperature coefficient information to adjust the power voltage, which then feeds back to the clock signal generating circuit to maintain linear temperature-cycling relationship, ensuring both reliability and precision across temperature ranges.
2Manufacturing precision
If the clock signal cycle is adjusted to be linear with temperature, then temperature compensation is achieved, but additional voltage control circuits are required
Solution Approach 1:
The power voltage providing circuit serves multiple functions: it provides power voltage to the clock signal generating circuit and simultaneously performs temperature compensation by adjusting the voltage level based on temperature coefficient. This multi-functionality achieves linear clock cycling without adding separate complex control circuits.
Solution Approach 2:
The patent merges the voltage control function with the power supply function by integrating the power voltage providing circuit into the clock signal generator. This combination achieves temperature compensation while minimizing additional circuit complexity, as the same circuit that provides power also performs the compensation function.
Data Source
AI summary
A clock signal generator includes a power voltage providing circuit configured to provide a power voltage changing according to a temperature based on a temperature coefficient, a first reference voltage providing circuit configured to provide a first reference voltage based on an internal power voltage, and a clock signal generating circuit configured to generate a clock signal based on the power voltage and the first reference voltage.