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).
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Patent number: 9287209Abstract: 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: GrantFiled: December 28, 2011Date of Patent: March 15, 2016Assignee: Broadcom CorporationInventors: Agnes Neves Woo, Pascal Tran, Akira Ito, Guang-Jye Shiau, Chao-Yang Lu, Jung Wang
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Publication number: 20130113077Abstract: 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: ApplicationFiled: December 28, 2011Publication date: May 9, 2013Applicant: Broadcom CorporationInventors: Agnes Neves WOO, Pascal Tran, Akira Ito, Guang-Jye Shiau, Chao-Yang Lu, Jung Wang
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Patent number: 8289046Abstract: 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: GrantFiled: June 30, 2011Date of Patent: October 16, 2012Assignee: Broadcom CorporationInventors: Joseph Aziz, Andrew Chen, Derek Tam, Ark-Chew Wong, Agnes Neves Woo, Marcel Lugthart
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Patent number: 8049278Abstract: 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: GrantFiled: October 10, 2008Date of Patent: November 1, 2011Assignee: Broadcom CorporationInventor: Agnes Neves Woo
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Publication number: 20110254584Abstract: 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: ApplicationFiled: June 30, 2011Publication date: October 20, 2011Applicant: BROADCOM CORPORATIONInventors: Joseph Aziz, Andrew Chen, Derek Tam, Ark-Chew Wong, Agnes Neves Woo, Marcel Lugthart
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Patent number: 7982491Abstract: 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: GrantFiled: April 8, 2009Date of Patent: July 19, 2011Assignee: Broadcom CorporationInventors: Joseph Aziz, Andrew Chen, Derek Tam, Ark-Chew Wong, Agnes Neves Woo, Marcel Lugthart
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Patent number: 7920366Abstract: 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: GrantFiled: February 26, 2009Date of Patent: April 5, 2011Assignee: Broadcom CorporationInventors: Chun-Ying Chen, Agnes Neves Woo
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Publication number: 20100259340Abstract: 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: ApplicationFiled: April 8, 2009Publication date: October 14, 2010Applicant: BROADCOM CORPORATIONInventors: Joseph Aziz, Andrew Chen, Derek Tam, Ark-Chew Wong, Agnes Neves Woo, Marcel Lugthart
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Publication number: 20090161276Abstract: 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: ApplicationFiled: February 26, 2009Publication date: June 25, 2009Applicant: Broadcom CorporationInventors: Chun-Ying CHEN, Agnes Neves Woo
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Patent number: 7505238Abstract: 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: GrantFiled: July 6, 2005Date of Patent: March 17, 2009Inventors: Agnes Neves Woo, Chun-Ying Chen
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Publication number: 20090045464Abstract: 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: ApplicationFiled: October 10, 2008Publication date: February 19, 2009Applicant: Broadcom CorporationInventor: Agnes Neves Woo
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Patent number: 7439592Abstract: 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: GrantFiled: August 8, 2005Date of Patent: October 21, 2008Assignee: Broadcom CorporationInventor: Agnes Neves Woo