Cascaded current mirror circuit and chip
By introducing a bias multiplexing level shifting unit into the cascaded current mirror circuit, the functions of level shifting and cascaded biasing are multiplexed, which solves the problem of unstable operation of the current mirror under low voltage, improves the accuracy and stability of current replication, and reduces circuit complexity and power consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BEIJING TSINGTENG MICROSYSTEM CO LTD
- Filing Date
- 2026-05-19
- Publication Date
- 2026-07-17
AI Technical Summary
Existing cascaded current mirror circuits are difficult to operate normally in low-voltage environments. The bias voltage design is complex, the bias voltage is sensitive to the current magnitude, the current mirror is unstable, the level shifting technology increases the design complexity and fixed power consumption, and the bias voltage is independent of the current mirror structure, cannot self-compensate, and the mirroring accuracy is poor.
By employing a bias-multiplexed level shifting unit, level shifting and cascaded biasing are achieved within a single structure. The bias-multiplexed level shifting unit provides potential shifting and adaptive cascaded bias voltage for the current mirror unit, simplifying the circuit topology, reducing input and output voltage margins, and suppressing PVT discrepancies.
Improve current replication accuracy and operational stability in low-voltage operating scenarios, simplify circuit topology, reduce fixed power consumption and area, and adapt to a wide input current dynamic range.
Smart Images
Figure CN122411706A_ABST