HV Driver Circuit With Protected LV Level Shifter Biasing
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Solution Overview
Problem
Existing high-speed circuits face challenges in integrating high-voltage components for robustness while maintaining high-speed operation, as low-voltage components are more common but less robust, and conventional designs require external capacitors and additional pads for power transformation.
Innovation Solution
A high-speed circuit design incorporating a driver circuit with high-voltage components and a level shifter using low-voltage components, where a protection voltage generator generates bias voltages to protect low-voltage components, eliminating the need for external capacitors and additional pads by tying transistor gates to direct-current bias voltages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If low-voltage components are used in high-speed circuits, then operation speed is improved, but robustness deteriorates
Solution Approach 1:
The circuit is divided into two distinct domains: a low-voltage domain for high-speed operation (0.95V) and a high-voltage domain for robustness (1.2V/1.5V). The level shifter acts as an interface between these segmented domains, allowing each part to operate in its optimal voltage range without compromise.
Solution Approach 2:
The level shifter serves as an intermediary component that translates signals between the low-voltage domain (fast operation) and high-voltage domain (robust protection). This mediator enables low-voltage components to communicate with high-voltage components, combining the advantages of both voltage domains.
2Stability of the object's composition
If conventional power transformation methods are used, then power supply stability is improved, but device complexity increases
Solution Approach 1:
The protection voltage generator extracts only the necessary bias voltages (VBP and VBN) from the power supply to bias the protection transistors, eliminating the need for external capacitors and additional power transformation circuits. This extraction approach simplifies the overall device while maintaining power stability.
Solution Approach 2:
The protection voltage generator is an on-chip circuit that automatically generates the required bias voltages from the existing power supply, making the system self-sufficient. No external components or additional pads are needed, as the circuit serves itself by generating necessary voltages internally.
Data Source
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AI summary
A high-speed circuit with a high-voltage (HV) driver circuit. The high-speed circuit has a driver circuit and a level shifter. The driver circuit includes HV components which are operated in an HV domain. The level shifter includes low-voltage (LV) components which are operated in an LV domain. The level shifter translates signals from the LV domain to the HV domain to generate control signals for the driver circuit. The high-speed circuit may include a protection voltage generator converting a power supply voltage and a power ground voltage to generate a first direct-current bias voltage (VBP) and a second direct-current bias voltage (VBN) to bias the LV components of the level shifter. The LV components of the level shifter include input transistors and protection transistors. Gate voltages of the protection transistors may be tied to VBP or VBN.