Level shifting circuit for converting from high level to low level
By combining voltage divider circuits, acceleration circuits, and clamping protection circuits, the problems of large package size, high cost, and long level conversion time when high level drives low level are solved, realizing fast and safe level conversion, which is suitable for cascaded applications of multi-chip systems.
Patent Information
- Application Number
- CN202210016599.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-01-07
- Publication Date
- 2026-03-31
- Estimated Expiration
- 2042-01-07
AI Technical Summary
Existing level conversion circuits suffer from problems such as large package size, high cost, leakage current, and increased circuit area when driving low level with high level. In addition, the level conversion time is too long when there is a large parasitic capacitance, which may lead to bit errors.
It employs a voltage divider circuit, an acceleration circuit, and a clamping protection circuit. Precise voltage division is achieved through series voltage divider diodes and resistors, and level switching is accelerated by capacitors and transistors. The clamping protection circuit prevents overshoot, thus realizing rapid level switching.
Without increasing power consumption, the circuit area is reduced, a fast high-to-low level transition is achieved, damage to low-voltage transistors is avoided, and the cascading application requirements of multi-chip systems are met.