Patents by Inventor Gopinath Maasi
Gopinath Maasi 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: 9191124Abstract: An opto-isolator with a correction circuit is disclosed. The correction circuit is configured to make adjustments for degradation of the light source of the opto-isolator. The correction circuit may comprise a photodetector for detecting degradation of the light source of the opto-isolator. When the light source degrades below a predetermined level, the correction circuit may be configured to make adjustments.Type: GrantFiled: October 25, 2012Date of Patent: November 17, 2015Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.Inventors: Gopinath Maasi, Thiam Siew Tay, Soo Kiang Ho, Peng Siang Seet
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Patent number: 8853658Abstract: An optoelectronic device is disclosed. The optoelectronic device may be employed as a single or multi-channel opto-coupler that electrically isolates one circuit from another circuit. The opto-coupler may include one or more folded leads that establish an enhanced isolation gap. The enhanced isolation gap may include an interruption in the insulation of the opto-coupler between the light source and the light detector. In addition, this interruption may further include a efficiency enhancer, or lens, to direct light emitted from the light source. Accordingly, the creepage distance and operational voltages of the opto-coupler can be increased while maintaining high efficiency levels.Type: GrantFiled: August 8, 2012Date of Patent: October 7, 2014Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.Inventors: Gopinath Maasi, Gary Tay
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Publication number: 20140119739Abstract: An opto-isolator with a correction circuit is disclosed. The correction circuit is configured to make adjustments for degradation of the light source of the opto-isolator. The correction circuit may comprise a photodetector for detecting degradation of the light source of the opto-isolator. When the light source degrades below a predetermined level, the correction circuit may be configured to make adjustments.Type: ApplicationFiled: October 25, 2012Publication date: May 1, 2014Applicant: Avago Technologies General IP (Singapore) Pte. LtdInventors: Gopinath Maasi, Thiam Siew Tay, Soo Kiang Ho, Peng Siang Seet
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Publication number: 20140119691Abstract: An optoelectronic device is disclosed. The optoelectronic device may be employed as a single or multi-channel opto-coupler that electrically isolates one circuit from another circuit. The opto-coupler may include one or more light guides that facilitate an efficient transfer of optical signals from a light source to a light detector.Type: ApplicationFiled: October 29, 2012Publication date: May 1, 2014Applicant: Avago Technologies General IP (Singapore) Pte. Ltd.Inventors: Gary Tay, Premkumar Jeromerajan, Gopinath Maasi
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Publication number: 20140042344Abstract: An optoelectronic device is disclosed. The optoelectronic device may be employed as a single or multi-channel opto-coupler that electrically isolates one circuit from another circuit. The opto-coupler may include one or more folded leads that establish an enhanced isolation gap. The enhanced isolation gap may include an interruption in the insulation of the opto-coupler between the light source and the light detector. In addition, this interruption may further include a efficiency enhancer, or lens, to direct light emitted from the light source. Accordingly, the creepage distance and operational voltages of the opto-coupler can be increased while maintaining high efficiency levels.Type: ApplicationFiled: August 8, 2012Publication date: February 13, 2014Applicant: Avago Technologies General IP (Singapore) Pte. LtdInventors: Gopinath Maasi, Gary Tay
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Publication number: 20130313447Abstract: An optoelectronic device is disclosed. The optoelectronic device may be employed as a single or multi-channel opto-coupler that electrically isolates one circuit from another circuit. The opto-coupler may include one or more light guides and an insulative tape that helps define a shape of the one or more light guides.Type: ApplicationFiled: August 5, 2013Publication date: November 28, 2013Applicant: Avago Technologies General IP (Singapore) Pte. Ltd.Inventors: Thiam Siew Gary Tay, Premkumar Jeromerajan, Gopinath Maasi
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Patent number: 8577190Abstract: An optocoupler having an optical transmitter die, an optical receiver die, a light guide, a limiting element and a body is disclosed. The light guide is confined to upper portion of the body by using the limiting element. In one embodiment, the limiting element is a dielectric tape. In yet another embodiment, the limiting element is a pre-molded plastic attached to the lead frame via non-conductive epoxy. The use of the limiting element yields light guides having consistent shape.Type: GrantFiled: December 7, 2011Date of Patent: November 5, 2013Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.Inventors: Gary Tay Thiam Siew, Gopinath Maasi
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Patent number: 8571360Abstract: An optocoupler with a light guide defining element is presented. The light guide defining element has at least one cavity configured to define the shape of the light guide formed by a transparent encapsulant encapsulating the optical transmitter and receiver dies. The transparent encapsulant in liquid form may be injected into the cavity prior to a curing process to harden the encapsulant into a light guide with a predetermined shape. The cavity of the light guide element may be defined by a reflective surface having micro-optics formed thereon. A multichannel optocoupler with multiple transmitter and/or receiver dies having such light guide defining element is also presented. The light guide defining element may have a single cavity enveloping all the optical transmitter or receiver dies, or a multiple cavities by having a pair of transmitter and receiver dies inside each cavity.Type: GrantFiled: November 12, 2010Date of Patent: October 29, 2013Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.Inventors: Thiam Siew Gary Tay, Gopinath Maasi
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Patent number: 8563337Abstract: A semiconductor device and methods of manufacturing the same are disclosed. Specifically, methods and devices for manufacturing optocouplers are disclosed. Even more specifically, methods and devices that deposit one or more encapsulant materials on optocouplers are disclosed. The encapsulant material may include silicone and the devices used to deposit the silicone may be configured to simultaneously deposit the silicone on different sides of the optocoupler, thereby reducing manufacturing steps and time.Type: GrantFiled: October 24, 2011Date of Patent: October 22, 2013Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.Inventors: Premkumar Jeromerajan, Gopinath Maasi, Tay Thiam Siew Gary
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Publication number: 20130181232Abstract: Various embodiments of methods and devices are provided for an optocoupler comprising an optically reflective compound comprising silicone and inner and outer surfaces. A molding compound surrounds and encapsulates at least portions of the outer surfaces of the optically reflective compound to form an enclosure. A surface functional coating layer is provided in the optically reflective compound to promote adhesion and increase breakdown voltages between inner walls of the enclosure and the outer surfaces of the optically reflective compound.Type: ApplicationFiled: January 17, 2012Publication date: July 18, 2013Applicant: Avago Technologies ECBU IP (Singapore) Pte. Ltd.Inventors: Premkumar Jeromerajan, Gopinath Maasi, Gary Tay Thiam Siew
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Publication number: 20130102096Abstract: A semiconductor device and methods of manufacturing the same are disclosed. Specifically, methods and devices for manufacturing optocouplers are disclosed. Even more specifically, methods and devices that deposit one or more encapsulant materials on optocouplers are disclosed. The encapsulant material may include silicone and the devices used to deposit the silicone may be configured to simultaneously deposit the silicone on different sides of the optocoupler, thereby reducing manufacturing steps and time.Type: ApplicationFiled: October 24, 2011Publication date: April 25, 2013Applicant: AVAGO TECHNOLOGIES ECBU IP (SINGAPORE) PTE. LTD.Inventors: Premkumar Jeromerajan, Gopinath Maasi, Tay Thiam Siew Gary
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Patent number: 8412006Abstract: An optocoupler with optical transmitter and receiver dies attached to a single conductive pad is presented. One of the optical transmitter and receiver dies may be attached directly to the conductive pad, while the other one of the optical transmitter and receiver dies may be attached to the conductive pad by means of three layers of materials comprising an isolation layer sandwiched between two attachment layers. A multi-channel optocoupler with multiple transmitter and/or receiver dies is also presented, in which one of the optical transmitter and receiver dies may be attached directly to the conductive pad. The other optical transmitter or receiver dies may be attached to the conductive pad by means of three layers of materials comprising an isolation layer sandwiched between two attachment layers.Type: GrantFiled: March 23, 2010Date of Patent: April 2, 2013Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.Inventors: Thiam Siew Gary Tay, Gopinath Maasi
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Publication number: 20120076455Abstract: An optocoupler having an optical transmitter die, an optical receiver die, a light guide, a limiting element and a body is disclosed. The light guide is confined to upper portion of the body by using the limiting element. In one embodiment, the limiting element is a dielectric tape. In yet another embodiment, the limiting element is a pre-molded plastic attached to the lead frame via non-conductive epoxy. The use of the limiting element yields light guides having consistent shape.Type: ApplicationFiled: December 7, 2011Publication date: March 29, 2012Applicant: Avago Technologies ECBU IP (Singapore) Pte. Ltd.Inventors: Gary Tay Thiam Siew, Gopinath Maasi
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Publication number: 20110235974Abstract: An optocoupler with optical transmitter and receiver dies attached to a single conductive pad is presented. One of the optical transmitter and receiver dies may be attached directly to the conductive pad, while the other one of the optical transmitter and receiver dies may be attached to the conductive pad by means of three layers of materials comprising an isolation layer sandwiched between two attachment layers. A multi-channel optocoupler with multiple transmitter and/or receiver dies is also presented, in which one of the optical transmitter and receiver dies may be attached directly to the conductive pad. The other optical transmitter or receiver dies may be attached to the conductive pad by means of three layers of materials comprising an isolation layer sandwiched between two attachment layers.Type: ApplicationFiled: March 23, 2010Publication date: September 29, 2011Inventors: Thiam Siew Gary Tay, Gopinath Maasi