Band-gap reference circuit with simple starting circuit
By designing a simple NMOS tube and resistor combination startup circuit in the bandgap reference circuit, the problem of excessive resource occupancy of the startup circuit in the prior art is solved, and the circuit is self-started and normal operation when powered on.
CN119739249APending Publication Date: 2025-04-01UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information
- Application Number
- CN202411879373.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-04-01
AI Technical Summary
Technical Problem
The starting circuit of the existing bandgap reference circuit takes up too much area resources, which makes it difficult for the circuit to get rid of the degenerate point when powered on, affecting normal operation.
Method used
A bandgap reference circuit with a simple start circuit is designed to generate a control signal START through a simple combination of NMOS tube and resistors, helping the circuit get rid of the degenerate point and stabilize to the correct working point.
Benefits of technology
After powering on the power supply, the circuit can effectively get rid of the degenerate point, work normally, and consume very little circuit resources, bringing only the resource overhead of two NMOS tubes and one resistor.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention belongs to the technical field of integrated circuits, and particularly relates to a band-gap reference circuit with a simple starting circuit. The band-gap reference starting circuit comprises a reference voltage generation module and a band-gap reference starting circuit module, the reference voltage generation module is used for generating a reference voltage which has a very low temperature coefficient within a certain range, that is, the reference voltage is basically not influenced by temperature change, the band-gap reference starting circuit is used for breaking a degeneracy point existing in the band-gap reference circuit, and the starting circuit is used for starting the band-gap reference circuit by providing initial current or voltage. And the circuit gets rid of degeneracy points and works normally. A control signal START is generated through a branch and acts on the grid electrode of the NMOS tube to open the NMOS tube, so that the key node voltage of the circuit gets rid of a degeneracy point and is stabilized to a correct working point.
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