Patents by Inventor Russell J. Fagg
Russell J. Fagg 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: 8781430Abstract: Exemplary embodiments of the invention disclose receiver baseband filtering. In an exemplary embodiment, the filter device may comprise a continuous-time filter and a discrete-time filter operably coupled to the continuous time-filter. The discrete-time filter may include a passive infinite impulse response filter operably coupled between the continuous-time filter and an amplifier. The discrete-time filter may also include an active infinite impulse response filter operably coupled between an output of the amplifier and an input of the amplifier. The discrete-time filter may be configured to combine an output of the active infinite impulse response filter and an output of the passive infinite impulse response filter to form a composite signal. Furthermore, the amplifier may be configured to receive and amplify the composite signal.Type: GrantFiled: June 29, 2009Date of Patent: July 15, 2014Assignee: QUALCOMM IncorporatedInventor: Russell J. Fagg
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Patent number: 8487670Abstract: A frequency divider involves a plurality of Injection-locked Ring Oscillators (ILRO). A first ILRO includes a pair of cross-coupled N-channel transistors, a pair of load resistors, an integrating capacitor, and a current injection circuit. The drain of each transistor is coupled to the gate of the other transistor. Each load resistor couples the drain of each transistor to a circuit voltage source. The integrating capacitor couples the sources of each transistor. The current injection circuit alternately opens and closes a path from the source of each transistor to circuit ground in response to an oscillatory input signal of a first frequency. In response, the voltage state at the drain of each transistor is alternately latched and toggled, generating a differential pair of oscillating signals frequency divided by two. A first and second ILRO driven in antiphase generate two differential output signals in phase quadrature.Type: GrantFiled: September 3, 2009Date of Patent: July 16, 2013Assignee: QUALCOMM, IncorporatedInventor: Russell J. Fagg
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Patent number: 8212592Abstract: Techniques for generating quadrature signals from a local oscillator signal, wherein the generated quadrature signals have a frequency half of the local oscillator frequency. In an exemplary embodiment, two oscillators, e.g., injection locked oscillators, are provided, each oscillator having a load, a cross-coupled transistor pair, an integrating capacitor, and current injection transistors. A differential pair is coupled to the leads of each of the integrating capacitors, and the drains of the differential pair are coupled to the outputs of the other oscillator to help increase the slew rate of the output voltages of the other oscillator. The inputs to the differential pair may be first amplified to improve the gain of the differential pair. In another exemplary embodiment, the power consumption of the differential pair may be reduced by operating them in a discontinuous mode, e.g., by coupling the source voltages of the differential pair to corresponding delayed versions of the drain voltages.Type: GrantFiled: December 8, 2009Date of Patent: July 3, 2012Assignee: QUALCOMM, IncorporatedInventor: Russell J. Fagg
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Publication number: 20110050296Abstract: A frequency divider involves a plurality of Injection-locked Ring Oscillators (ILRO). A first ILRO includes a pair of cross-coupled N-channel transistors, a pair of load resistors, an integrating capacitor, and a current injection circuit. The drain of each transistor is coupled to the gate of the other transistor. Each load resistor couples the drain of each transistor to a circuit voltage source. The integrating capacitor couples the sources of each transistor. The current injection circuit alternately opens and closes a path from the source of each transistor to circuit ground in response to an oscillatory input signal of a first frequency. In response, the voltage state at the drain of each transistor is alternately latched and toggled, generating a differential pair of oscillating signals frequency divided by two. A first and second ILRO driven in antiphase generate two differential output signals in phase quadrature.Type: ApplicationFiled: September 3, 2009Publication date: March 3, 2011Applicant: QUALCOMM IncorporatedInventor: Russell J. Fagg
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Publication number: 20110043291Abstract: Techniques for generating quadrature signals from a local oscillator signal, wherein the generated quadrature signals have a frequency half of the local oscillator frequency. In an exemplary embodiment, two oscillators, e.g., injection locked oscillators, are provided, each oscillator having a load, a cross-coupled transistor pair, an integrating capacitor, and current injection transistors. A differential pair is coupled to the leads of each of the integrating capacitors, and the drains of the differential pair are coupled to the outputs of the other oscillator to help increase the slew rate of the output voltages of the other oscillator. The inputs to the differential pair may be first amplified to improve the gain of the differential pair. In another exemplary embodiment, the power consumption of the differential pair may be reduced by operating them in a discontinuous mode, e.g., by coupling the source voltages of the differential pair to corresponding delayed versions of the drain voltages.Type: ApplicationFiled: December 8, 2009Publication date: February 24, 2011Applicant: QUALCOMM INCORPORATEDInventor: Russell J. Fagg
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Publication number: 20100327965Abstract: Exemplary embodiments of the invention disclose receiver baseband filtering. In an exemplary embodiment, the filter device may comprise a continuous-time filter and a discrete-time filter operably coupled to the continuous time-filter. The discrete-time filter may include a passive infinite impulse response filter operably coupled between the continuous-time filter and an amplifier. The discrete-time filter may also include an active infinite impulse response filter operably coupled between an output of the amplifier and an input of the amplifier. The discrete-time filter may be configured to combine an output of the active infinite impulse response filter and an output of the passive infinite impulse response filter to form a composite signal. Furthermore, the amplifier may be configured to receive and amplify the composite signal.Type: ApplicationFiled: June 29, 2009Publication date: December 30, 2010Applicant: QUALCOMM IncorporatedInventor: Russell J. Fagg
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Patent number: 7218951Abstract: A single continuous closed-loop power control feedback system provides seamless power control for a power amplifier and also enables an AM signal to be injected into the power amplifier through the power amplifiers' control port. The AM signal is developed by an I/Q modulator and supplied to a comparator located in the power control loop. By using leakage from the power amplifier as feedback to a phase locked loop during initial power amplifier power ramp-up, the single continuous closed-loop power control system provides continuous feedback to the phase locked loop during the entire power amplification ramp-up period and eliminates the need for multiple feedback loops.Type: GrantFiled: July 6, 2004Date of Patent: May 15, 2007Assignee: Skyworks Solutions, Inc.Inventors: Dmitriy Rozenblit, Morten Damgaard, Russell J. Fagg, William J. Domino
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Patent number: 7099636Abstract: A single continuous closed-loop power control feedback system provides seamless power control for a power amplifier and also enables an AM signal to be injected into the power amplifier through the power amplifiers' control port. The AM signal is developed by an I/Q modulator and supplied to a comparator located in the power control loop. By using leakage from the power amplifier as feedback to a phase locked loop during initial power amplifier power ramp-up, the single continuous closed-loop power control system provides continuous feedback to the phase locked loop during the entire power amplification ramp-up period and eliminates the need for multiple feedback loops.Type: GrantFiled: March 18, 2003Date of Patent: August 29, 2006Assignee: Skyworks Solutions, Inc.Inventors: Dmitriy Rozenblit, Morten Damgaard, Russell J. Fagg, William J. Domino
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Publication number: 20040248528Abstract: A single continuous closed-loop power control feedback system provides seamless power control for a power amplifier and also enables an AM signal to be injected into the power amplifier through the power amplifiers' control port. The AM signal is developed by an I/Q modulator and supplied to a comparator located in the power control loop. By using leakage from the power amplifier as feedback to a phase locked loop during initial power amplifier power ramp-up, the single continuous closed-loop power control system provides continuous feedback to the phase locked loop during the entire power amplification ramp-up period and eliminates the need for multiple feedback loops.Type: ApplicationFiled: July 6, 2004Publication date: December 9, 2004Applicant: Sonny TrinhInventors: Dmitriy Rozenblit, Morten Damgaard, Russell J. Fagg, William J. Domino
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Publication number: 20040198270Abstract: A single continuous closed-loop power control feedback system provides seamless power control for a power amplifier and also enables an AM signal to be injected into the power amplifier through the power amplifiers' control port. The AM signal is developed by an I/Q modulator and supplied to a comparator located in the power control loop. By using leakage from the power amplifier as feedback to a phase locked loop during initial power amplifier power ramp-up, the single continuous closed-loop power control system provides continuous feedback to the phase locked loop during the entire power amplification ramp-up period and eliminates the need for multiple feedback loops.Type: ApplicationFiled: March 18, 2003Publication date: October 7, 2004Applicant: Skyworks Solutions, Inc.Inventors: Dmitriy Rozenblit, Morten Damgaard, Russell J. Fagg, William J. Domino
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Patent number: 6801784Abstract: A single continuous closed-loop power control feedback system provides seamless power control/for a power amplifier and also enables an AM signal to be injected into the power amplifier through the power amplifiers' control port. The AM signal is developed by an I/Q modulator and supplied to a comparator located in the power control loop.Type: GrantFiled: November 2, 2000Date of Patent: October 5, 2004Assignee: Skyworks Solutions, Inc.Inventors: Dmitriy Rozenblit, Morten Damgaard, Russell J. Fagg, William J. Domino