Patents by Inventor Agnes Neves Woo

Agnes Neves Woo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9287209
    Abstract: Embodiments described herein provide a structure for finger capacitors, and more specifically metal-oxide-metal (“MOM”) finger capacitors and arrays of finger capacitors. A plurality of Shallow Trench Isolation (STI) formations is associated with every other column of capacitor fingers, with poly fill formations covering the STI formations to provide a more robust and efficient structure.
    Type: Grant
    Filed: December 28, 2011
    Date of Patent: March 15, 2016
    Assignee: Broadcom Corporation
    Inventors: Agnes Neves Woo, Pascal Tran, Akira Ito, Guang-Jye Shiau, Chao-Yang Lu, Jung Wang
  • Publication number: 20130113077
    Abstract: Embodiments described herein provide a structure for finger capacitors, and more specifically metal-oxide-metal (“MOM”) finger capacitors and arrays of finger capacitors. A plurality of Shallow Trench Isolation (STI) formations is associated with every other column of capacitor fingers, with poly fill formations covering the STI formations to provide a more robust and efficient structure.
    Type: Application
    Filed: December 28, 2011
    Publication date: May 9, 2013
    Applicant: Broadcom Corporation
    Inventors: Agnes Neves WOO, Pascal Tran, Akira Ito, Guang-Jye Shiau, Chao-Yang Lu, Jung Wang
  • Patent number: 8289046
    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.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: October 16, 2012
    Assignee: Broadcom Corporation
    Inventors: Joseph Aziz, Andrew Chen, Derek Tam, Ark-Chew Wong, Agnes Neves Woo, Marcel Lugthart
  • Patent number: 8049278
    Abstract: An ESD device includes a low doped well connected to a first contact and a diffusion area connected to a second contact. A substrate between the low doped well and the diffusion area has a dopant polarity that is opposite a dopant polarity of the low doped well and the diffusion area. A distance between the low doped well and the diffusion area determines a triggering voltage of the ESD device. A depletion region is formed between the low doped well and the substrate when a reverse bias voltage is applied to the ESD device. A current discharging path is formed between the first contact and the second contact when the depletion region comes in to contact with the diffusion area. The substrate is biased by a connection to the second contact. Alternatively, an additional diffusion area with the same dopant polarity, connected to a third contact, biases the substrate.
    Type: Grant
    Filed: October 10, 2008
    Date of Patent: November 1, 2011
    Assignee: Broadcom Corporation
    Inventor: Agnes Neves Woo
  • Publication number: 20110254584
    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.
    Type: Application
    Filed: June 30, 2011
    Publication date: October 20, 2011
    Applicant: BROADCOM CORPORATION
    Inventors: Joseph Aziz, Andrew Chen, Derek Tam, Ark-Chew Wong, Agnes Neves Woo, Marcel Lugthart
  • Patent number: 7982491
    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.
    Type: Grant
    Filed: April 8, 2009
    Date of Patent: July 19, 2011
    Assignee: Broadcom Corporation
    Inventors: Joseph Aziz, Andrew Chen, Derek Tam, Ark-Chew Wong, Agnes Neves Woo, Marcel Lugthart
  • Patent number: 7920366
    Abstract: An integrated circuit can include an I/O pad, an internal circuit, an inductor, an electrostatic discharge (ESD) protection circuit, and an ESD clamp. The internal circuit can be biased with a first voltage supply and a second voltage supply, where the internal circuit is connected to the I/O pad at a first node. The ESD protection circuit can be connected between the first node and a second node. The inductor can be connected between the second node and a third voltage supply. Further, the ESD clamp can be connected between the second node and the second voltage supply.
    Type: Grant
    Filed: February 26, 2009
    Date of Patent: April 5, 2011
    Assignee: Broadcom Corporation
    Inventors: Chun-Ying Chen, Agnes Neves Woo
  • Publication number: 20100259340
    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.
    Type: Application
    Filed: April 8, 2009
    Publication date: October 14, 2010
    Applicant: BROADCOM CORPORATION
    Inventors: Joseph Aziz, Andrew Chen, Derek Tam, Ark-Chew Wong, Agnes Neves Woo, Marcel Lugthart
  • Publication number: 20090161276
    Abstract: An integrated circuit can include an I/O pad, an internal circuit, an inductor, an electrostatic discharge (ESD) protection circuit, and an ESD clamp. The internal circuit can be biased with a first voltage supply and a second voltage supply, where the internal circuit is connected to the I/O pad at a first node. The ESD protection circuit can be connected between the first node and a second node. The inductor can be connected between the second node and a third voltage supply. Further, the ESD clamp can be connected between the second node and the second voltage supply.
    Type: Application
    Filed: February 26, 2009
    Publication date: June 25, 2009
    Applicant: Broadcom Corporation
    Inventors: Chun-Ying CHEN, Agnes Neves Woo
  • Patent number: 7505238
    Abstract: An I/O ESD protection configuration of an integrated circuit that includes an ESD protection circuit connected between an I/O pad and an internal circuit at a first node and to an inductor at a second node. The inductor is connected between the second node and an external power supply. The external power supply provides a high reverse bias voltage across a diode of the ESD protection circuit. An ESD clamp is connected between the second node and a ground. An ESD discharge current is shunted through the ESD protection circuit and through the ESD clamp during a positive I/O ESD event. The inductor can be chosen to tune out a parasitic capacitance of the ESD clamp. The inductor can also block high frequency signals between the I/O pad and the external power supply, thereby minimizing the parasitic capacitance of the diode of the ESD protection circuit at high frequency.
    Type: Grant
    Filed: July 6, 2005
    Date of Patent: March 17, 2009
    Inventors: Agnes Neves Woo, Chun-Ying Chen
  • Publication number: 20090045464
    Abstract: An ESD device includes a low doped well connected to a first contact and a diffusion area connected to a second contact. A substrate between the low doped well and the diffusion area has a dopant polarity that is opposite a dopant polarity of the low doped well and the diffusion area. A distance between the low doped well and the diffusion area determines a triggering voltage of the ESD device. A depletion region is formed between the low doped well and the substrate when a reverse bias voltage is applied to the ESD device. A current discharging path is formed between the first contact and the second contact when the depletion region comes in to contact with the diffusion area. The substrate is biased by a connection to the second contact. Alternatively, an additional diffusion area with the same dopant polarity, connected to a third contact, biases the substrate.
    Type: Application
    Filed: October 10, 2008
    Publication date: February 19, 2009
    Applicant: Broadcom Corporation
    Inventor: Agnes Neves Woo
  • Patent number: 7439592
    Abstract: An ESD device includes a low doped well connected to a first contact and a diffusion area connected to a second contact. A substrate between the low doped well and the diffusion area has a dopant polarity that is opposite a dopant polarity of the low doped well and the diffusion area. A distance between the low doped well and the diffusion area determines a triggering voltage of the ESD device. A depletion region is formed between the low doped well and the substrate when a reverse bias voltage is applied to the ESD device. A current discharging path is formed between the first contact and the second contact when the depletion region comes in to contact with the diffusion area. The substrate is biased by a connection to the second contact. Alternatively, an additional diffusion area with the same dopant polarity, connected to a third contact, biases the substrate.
    Type: Grant
    Filed: August 8, 2005
    Date of Patent: October 21, 2008
    Assignee: Broadcom Corporation
    Inventor: Agnes Neves Woo