Invention Grant
- Patent Title: Generating a root of an open-loop freqency response that tracks an opposite root of the frequency response
- Patent Title (中): 生成跟踪频率响应的相反根的开环频率响应的根
-
Application No.: US13915828Application Date: 2013-06-12
-
Publication No.: US09256233B2Publication Date: 2016-02-09
- Inventor: Pralay Mandal , Sajal Kumar Mandal
- Applicant: STMicroelectronics International N.V.
- Applicant Address: NL Amsterdam
- Assignee: STMicroelectronics International N.V.
- Current Assignee: STMicroelectronics International N.V.
- Current Assignee Address: NL Amsterdam
- Agency: Gardere Wynne Sewell LLP
- Main IPC: G05F1/575
- IPC: G05F1/575 ; G05F1/445

Abstract:
In an embodiment, an electronic includes a feedback-coupled circuit stage and a compensation circuit stage. The feedback-coupled stage is configured to drive a load, and the compensation stage is coupled to the feedback-coupled stage such that a combination of the compensation and feedback-coupled stages has a frequency response including a first root and an opposite second root that depend on the load. For example, an embodiment of such an electronic circuit may be a low-dropout (LDO) voltage regulator that lacks a large output capacitance for forming a dominant pole to stabilize the regulator. The regulator includes a feedback-coupled stage that generates and regulates an output voltage, and includes a compensation stage that is designed such that the frequency response of the regulator includes a zero that tracks a non-dominant output pole of the regulator so that the output pole does not adversely affect the stability of the regulator.
Public/Granted literature
Information query
IPC分类: