Resumes
Resumes
Marcel Lugthart Phones & Addresses
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24134 Hollyoak, Aliso Viejo, CA 92656 (949) 716-3342
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Laguna Hills, CA
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Cupertino, CA
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San Jose, CA
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Orange, CA
Publications
Us Patents
Successive Approximation Analog To Digital Converter
View pageUS Patent:
7642946, Jan 5, 2010
Filed:
Apr 7, 2008
Appl. No.:
12/098842
Inventors:
Marcel L. Lugthart - Aliso Viejo CA, US
Andrew R. Chen - Redondo Beach CA, US
Andrew R. Chen - Redondo Beach CA, US
Assignee:
Broadcom Corporation - Irvine CA
International Classification:
H03M 1/34
US Classification:
341163, 341154, 341144, 341155
Abstract:
A system and method are provided allowing for successive approximation analog to digital conversion. A first differential voltage is sampled and held during a first cycle. The first differential voltage is converted to a differential current. A second differential voltage is generated based on the differential current flowing through parallel-coupled respective first and second variable resistances. First and second portions of the second differential voltage are compared to produce a comparison result therefrom. Successive approximation is used to generate a signal based on the comparison result, the signal being an output signal and being used to control resistances of respective ones of the first and second variable resistances during subsequent cycles.
Active Termination And Switchable Passive Termination Circuits
View pageUS Patent:
7982491, Jul 19, 2011
Filed:
Apr 8, 2009
Appl. No.:
12/384793
Inventors:
Joseph Aziz - Irvine CA, US
Andrew Chen - Redondo Beach CA, US
Derek Tam - Irvine CA, US
Agnes Neves Woo - Encino CA, US
Marcel Lugthart - Aliso Viejo CA, US
Andrew Chen - Redondo Beach CA, US
Derek Tam - Irvine CA, US
Agnes Neves Woo - Encino CA, US
Marcel Lugthart - Aliso Viejo CA, US
Assignee:
Broadcom Corporation - Irvine CA
International Classification:
H03K 17/16
H03K 19/003
H03K 19/003
US Classification:
326 30, 326 34, 326 86
Abstract:
According to one exemplary embodiment, an active termination circuit includes at least one active termination branch, where the at least one active termination branch includes at least one transistor for providing an active termination output. The at least one active termination branch further includes an amplifier driving the at least one transistor, where the amplifier has a non-inverting input coupled to the active termination output via a feedback network. The amplifier controls a current flowing through the at least one transistor so as to provide the active termination output. The active termination output can be provided at a drain of the at least one transistor, where a source of the at least one transistor is coupled to ground through a degeneration transistor and a tail current sink.
Switchable Passive Termination Circuits
View pageUS Patent:
8289046, Oct 16, 2012
Filed:
Jun 30, 2011
Appl. No.:
13/173706
Inventors:
Joseph Aziz - Irvine CA, US
Andrew Chen - Redondo Beach CA, US
Derek Tam - Irvine CA, US
Agnes Neves Woo - Encino CA, US
Marcel Lugthart - Aliso Viejo CA, US
Andrew Chen - Redondo Beach CA, US
Derek Tam - Irvine CA, US
Agnes Neves Woo - Encino CA, US
Marcel Lugthart - Aliso Viejo CA, US
Assignee:
Broadcom Corporation - Irvine CA
International Classification:
H03K 17/16
H03K 19/003
H03K 19/003
US Classification:
326 30, 326 34, 326 86, 326 90
Abstract:
According to one exemplary embodiment, an active termination circuit includes at least one active termination branch, where the at least one active termination branch includes at least one transistor for providing an active termination output. The at least one active termination branch further includes an amplifier driving the at least one transistor, where the amplifier has a non-inverting input coupled to the active termination output via a feedback network. The amplifier controls a current flowing through the at least one transistor so as to provide the active termination output. The active termination output can be provided at a drain of the at least one transistor, where a source of the at least one transistor is coupled to ground through a degeneration transistor and a tail current sink.