Patents by Inventor Tsvetomir P. Petrov

Tsvetomir P. Petrov 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).

  • Distributed supply current switch circuits for enabling individual power domains
    Patent number: 8063664
    Abstract: An integrated circuit includes multiple power domains. Supply current switch circuits (SCSCs) are distributed across each power domain. When a signal is present on a control node within a SCSC, the SCSC couples a local supply bus of the power domain to a global supply bus. An enable signal path extends through the SCSCs so that an enable signal can be propagated down a chain of SCSCs from control node to control node, thereby turning the SCSCs on one by one. When the domain is to be powered up, a control circuit asserts an enable signal that propagates down a first chain of SCSCs. After a programmable amount of time, the control circuit asserts a second enable signal that propagates down a second chain. By spreading the turning on of SCSCs over time, large currents that would otherwise be associated with coupling the local and global buses together are avoided.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: November 22, 2011
    Assignee: QUALCOMM Incorporated
    Inventors: Lew G Chua-Eoan, Matthew L Severson, Sorin A Dobre, Tsvetomir P Petrov, Rajat Goel
  • DISTRIBUTED SUPPLY CURRENT SWITCH CIRCUITS FOR ENABLING INDIVIDUAL POWER DOMAINS
    Publication number: 20100097101
    Abstract: An integrated circuit includes multiple power domains. Supply current switch circuits (SCSCs) are distributed across each power domain. When a signal is present on a control node within a SCSC, the SCSC couples a local supply bus of the power domain to a global supply bus. An enable signal path extends through the SCSCs so that an enable signal can be propagated down a chain of SCSCs from control node to control node, thereby turning the SCSCs on one by one. When the domain is to be powered up, a control circuit asserts an enable signal that propagates down a first chain of SCSCs. After a programmable amount of time, the control circuit asserts a second enable signal that propagates down a second chain. By spreading the turning on of SCSCs over time, large currents that would otherwise be associated with coupling the local and global buses together are avoided.
    Type: Application
    Filed: December 18, 2009
    Publication date: April 22, 2010
    Applicant: QUALCOMM INCORPORATED
    Inventors: Lew G. Chua-Eoan, Matthew Levi Severson, Sorin Adrian Dobre, Tsvetomir P. Petrov, Rajat Goel
  • Distributed supply current switch circuits for enabling individual power domains
    Patent number: 7659746
    Abstract: An integrated circuit includes multiple power domains. Supply current switch circuits (SCSCs) are distributed across each power domain. When a signal is present on a control node within a SCSC, the SCSC couples a local supply bus of the power domain to a global supply bus. An enable signal path extends through the SCSCs so that an enable signal can be propagated down a chain of SCSCs from control node to control node, thereby turning the SCSCs on one by one. When the domain is to be powered up, a control circuit asserts an enable signal that propagates down a first chain of SCSCs. After a programmable amount of time, the control circuit asserts a second enable signal that propagates down a second chain. By spreading the turning on of SCSCs over time, large currents that would otherwise be associated with coupling the local and global buses together are avoided.
    Type: Grant
    Filed: September 16, 2005
    Date of Patent: February 9, 2010
    Assignee: QUALCOMM, Incorporated
    Inventors: Lew G. Chua-Eoan, Matthew Levi Severson, Sorin Adrian Dobre, Tsvetomir P. Petrov, Rajat Goel