Invention Grant
- Patent Title: Low noise, low dropout voltage regulator
- Patent Title (中): 低噪声,低压差稳压器
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Application No.: US13236012Application Date: 2011-09-19
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Publication No.: US08692529B1Publication Date: 2014-04-08
- Inventor: Michael A. Wyatt
- Applicant: Michael A. Wyatt
- Applicant Address: US VA McLean
- Assignee: Exelis, Inc.
- Current Assignee: Exelis, Inc.
- Current Assignee Address: US VA McLean
- Agency: RatnerPrestia
- Main IPC: G05F1/44
- IPC: G05F1/44 ; G05F1/40

Abstract:
A low dropout (LDO) voltage regulator includes a scaling amplifier for receiving a bandgap voltage, Vbg, and outputting a scaled Vbg. A reference MOSFET device is included for reducing the scaled Vbg by a first voltage Vgs formed across gate and source nodes of the reference MOSFET device. This forms a reduced level of the scaled Vbg. An RC network filters the reduced level of the scaled Vbg and outputs a filtered voltage. An output buffer is included for receiving and increasing the filtered voltage by a second voltage Vgs in order to recover the scaled Vbg. The scaled Vbg is used as the desired regulated voltage output. The second voltage Vgs, which is produced by the output buffer, is equal to the first voltage Vgs, which is produced by the reference MOSFET device.
Information query
IPC分类: