Xiao Du Phones & Addresses
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Newton, MA
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Randolph, MA
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Milford, CT
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Manchester, CT
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New York, NY
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Bellingham, WA
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Carrboro, NC
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Ellensburg, WA
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Chapel Hill, NC
Publications
Us Patents
Low Power Receiver Circuit For Isolated Data Communications
View pageUS Patent:
20210119590, Apr 22, 2021
Filed:
Oct 18, 2019
Appl. No.:
16/657863
Inventors:
- Norwood MA, US
Xiao Hong Du - Wilmington MA, US
Xiao Hong Du - Wilmington MA, US
Assignee:
Analog Devices, Inc. - Norwood MA
International Classification:
H03F 3/24
H04B 1/04
H04B 1/16
H04B 1/04
H04B 1/16
Abstract:
Data isolators are described. The data isolators include a differential receiver having cross-coupled single-ended amplifiers. The single-ended amplifiers may be referenced to a time-varying reference potential. The cross-coupling of the single-ended amplifiers may provide high speed, low power consumption operation of the data isolator.
Gain Enhancement Using Advanced Correlated Level Shifting
View pageUS Patent:
20170126189, May 4, 2017
Filed:
Nov 2, 2015
Appl. No.:
14/930186
Inventors:
- Norwood MA, US
Khiem Quang Nguyen - Tewksbury MA, US
Xiao Hong Du - Wilmington MA, US
Khiem Quang Nguyen - Tewksbury MA, US
Xiao Hong Du - Wilmington MA, US
International Classification:
H03G 1/00
H03F 3/45
H03F 3/00
H03F 3/45
H03F 3/00
Abstract:
Systems and methods disclosed herein provide for enhancing the low frequency (DC) gain of an operational amplifier with multiple correlated level shifting capacitors. In an embodiment, the operational amplifier is level shifted with a first correlated level shifting capacitor in a first phase and, then, is level shifted again with at least a second correlated level shifting capacitor in at least a second, non-overlapping, consecutive phase. In an embodiment, the multiple correlated level capacitors are controlled by a switching circuit network.