Patents by Inventor Edward Perry Jordan
Edward Perry Jordan 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: 9716479Abstract: The present disclosure provides an amplifier and associated methods of operations. An exemplary amplifier an input terminal; an output terminal; a first virtual ground node; a second virtual ground node; an operational amplifier coupled with the input terminal and the output terminal; a resistive input section coupled with an input of the operational amplifier; and a resistive feedback section coupled with an output of the operational amplifier. The resistive input section includes a fixed input resistor coupled with the input terminal and the first virtual ground node, and a switchable input resistor segment coupled with the fixed input resistor in parallel. The resistive feedback section includes a fixed feedback resistor coupled with the output terminal and the first virtual ground node, and a switchable feedback resistor segment coupled with the fixed feedback resistor in parallel.Type: GrantFiled: February 8, 2013Date of Patent: July 25, 2017Assignee: ANALOG DEVICES, INC.Inventor: Edward Perry Jordan
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Patent number: 8912845Abstract: An integrated circuit includes a radio frequency (RF) amplifier having a trifilar transformer coupled to a gain device in two negative feedback paths. The trifilar transformer includes a first winding, a second winding and a third winding, a first dielectric core is disposed between the first winding and the second winding, and a second dielectric core is disposed between the second winding and the third winding. A first winding ratio between the first winding and the second winding combined with a second winding ratio between the second winding and the third winding affects a total gain of the RF amplifier. In a specific embodiment, the gain device is a transistor, the first winding is coupled to a base of the transistor, the second winding is coupled to a collector of the transistor, and the third winding is coupled to an emitter of the transistor.Type: GrantFiled: January 7, 2013Date of Patent: December 16, 2014Assignee: Analog Devices, Inc.Inventor: Edward Perry Jordan
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Patent number: 8890598Abstract: The present disclosure provides an attenuator and associated methods of operations. An exemplary attenuator includes an input terminal, an output terminal, a voltage reference terminal, a first attenuation segment coupled with the input terminal and the output terminal, and a second attenuation segment coupled with the first attenuation segment and the voltage reference terminal. The attenuator further includes at least two switches coupled with the input terminal and the output terminal in parallel with the first attenuation segment, where at least some of the at least two switches have an associated voltage control terminal. For example, the attenuator includes a first switch and a second switch coupled with the input terminal and the output terminal in parallel with the first attenuation segment, wherein a first voltage control terminal is coupled with the first switch and a second voltage control terminal is coupled with the second switch.Type: GrantFiled: January 25, 2013Date of Patent: November 18, 2014Assignee: Analog Devices, Inc.Inventor: Edward Perry Jordan
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Publication number: 20140225673Abstract: The present disclosure provides an amplifier and associated methods of operations. An exemplary amplifier an input terminal; an output terminal; a first virtual ground node; a second virtual ground node; an operational amplifier coupled with the input terminal and the output terminal; a resistive input section coupled with an input of the operational amplifier; and a resistive feedback section coupled with an output of the operational amplifier. The resistive input section includes a fixed input resistor coupled with the input terminal and the first virtual ground node, and a switchable input resistor segment coupled with the fixed input resistor in parallel. The resistive feedback section includes a fixed feedback resistor coupled with the output terminal and the first virtual ground node, and a switchable feedback resistor segment coupled with the fixed feedback resistor in parallel.Type: ApplicationFiled: February 8, 2013Publication date: August 14, 2014Applicant: ANALOG DEVICES, INC.Inventor: Edward Perry Jordan
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Publication number: 20140210538Abstract: The present disclosure provides an attenuator and associated methods of operations. An exemplary attenuator includes an input terminal, an output terminal, a voltage reference terminal, a first attenuation segment coupled with the input terminal and the output terminal, and a second attenuation segment coupled with the first attenuation segment and the voltage reference terminal. The attenuator further includes at least two switches coupled with the input terminal and the output terminal in parallel with the first attenuation segment, where at least some of the at least two switches have an associated voltage control terminal. For example, the attenuator includes a first switch and a second switch coupled with the input terminal and the output terminal in parallel with the first attenuation segment, wherein a first voltage control terminal is coupled with the first switch and a second voltage control terminal is coupled with the second switch.Type: ApplicationFiled: January 25, 2013Publication date: July 31, 2014Applicant: ANALOG DEVICES, INC.Inventor: Edward Perry Jordan
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Publication number: 20140191800Abstract: An integrated circuit includes a radio frequency (RF) amplifier having a trifilar transformer coupled to a gain device in two negative feedback paths. The trifilar transformer includes a first winding, a second winding and a third winding, a first dielectric core is disposed between the first winding and the second winding, and a second dielectric core is disposed between the second winding and the third winding. A first winding ratio between the first winding and the second winding combined with a second winding ratio between the second winding and the third winding affects a total gain of the RF amplifier. In a specific embodiment, the gain device is a transistor, the first winding is coupled to a base of the transistor, the second winding is coupled to a collector of the transistor, and the third winding is coupled to an emitter of the transistor.Type: ApplicationFiled: January 7, 2013Publication date: July 10, 2014Applicant: Analog Devices, Inc.Inventor: Edward Perry Jordan
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Patent number: 7230410Abstract: Current source embodiments are provided which generate an output current pulse whose initial and terminal slew rates are enhanced with initial and terminal generators that respectively provide an initial current pulse at initiation of the command signal and a terminal current pulse at termination of the command signal. Current source embodiments also include a correction generator that inserts correction currents to substantially correct Lambda current errors in the current sources.Type: GrantFiled: September 28, 2004Date of Patent: June 12, 2007Assignee: Analog Devices, Inc.Inventor: Edward Perry Jordan
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Patent number: 6674382Abstract: Line drivers are provided that are suitable for driving communication cables (e.g., in Data Over Cable Service Interface Specification (DOCSIS) certified systems) without the need for output drivers and their size, power-consumption, noise and signal-distortion penalities. These line drivers directly couple switched current mirrors to a transformer's input winding to simultaneously provide currents in response to a differential input signal and a digital command signal and drive the load impedance to thereby realize a corresponding signal gain.Type: GrantFiled: October 16, 2002Date of Patent: January 6, 2004Assignee: Analog Devices, Inc.Inventor: Edward Perry Jordan
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Patent number: 6653961Abstract: Mulitplying digital-to-analog converters (MDACs) are provided that reduce signal distortion without significantly raising current demand. These goals are achieved with input structures that lower input impedances and enhance the driving of nonlinear capacitances that are generally presented by the DAC portion of these devices.Type: GrantFiled: October 16, 2002Date of Patent: November 25, 2003Assignee: Analog Devices, Inc.Inventors: Royal A. Gosser, Edward Perry Jordan
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Patent number: 6597207Abstract: Verniers are provided that substantially eliminate DC offset signals as they convert a differential input signal Sin to a differential output signal Sout with a conversion gain that corresponds to a digital command signal. The verniers are especially suited for use with multiplying digital-to-analog converters (MDACs) in communication systems. An exemplary use is forming line drivers to drive load impedances (e.g., coaxial cables).Type: GrantFiled: October 16, 2002Date of Patent: July 22, 2003Assignee: Analog Devices, Inc.Inventors: Edward Perry Jordan, Royal A. Gosser
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Patent number: 6556075Abstract: Amplifier systems and methods are provided which closely approximate a constant output impedance and a constant quiescent output signal during forward and reverse modes of operation. The systems can be realized with small, inexpensive components that are compatible with integrated-circuit fabrication processes. A system embodiment includes a signal amplifier, a feedback path that is coupled across at least part of the signal amplifier to reduce its impedance, a reverse amplifier which is coupled to drive at least a feedback portion of the feedback path and a signal generator which controls operational timing of the signal amplifier and reverse amplifier. Another system embodiment includes an error-current canceler that cancels error currents of the signal amplifier with substantially equal and opposite correction currents.Type: GrantFiled: August 24, 2001Date of Patent: April 29, 2003Assignee: Analog Devices, Inc.Inventor: Edward Perry Jordan
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Patent number: 6529078Abstract: Transimpedance amplifiers are provided that generate low-distortion output voltage signals with simple, inexpensive structures that are compatible with integrated-circuit fabrication processes. The amplifiers include a current processor and a complementary output stage. The processor provides in-phase upper and lower current signals in response to a differential input current signal and differentially alters respective first and second amplitudes of these signals in response to a common-mode input current signal. The complementary output stage has upper and lower transistors that provide the output voltage signal in respective response to the upper and lower current signals and with distortion that is reduced by the altered first and second amplitudes.Type: GrantFiled: August 22, 2001Date of Patent: March 4, 2003Assignee: Analog Devices, Inc.Inventors: Royal A. Gosser, Edward Perry Jordan