Patents by Inventor Lawrence H. Edelson
Lawrence H. Edelson 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: 10283970Abstract: In an example, a circuit for controlling at least two electronic switches in a parallel configuration between a power supply and a load. The circuit includes a control circuit to generate first and second control signals to control first and second electronic switches of the at least two electronic switches, and establish a conduction sequence of the first and second electronic switches using the first and second control signals. The circuit includes a detection circuit configured to detect a current flowing through a control terminal of the first electronic switch during a transition portion, wherein the circuit is configured to adjust the first control signal and establish the second portion of the conduction sequence in response to the detected current.Type: GrantFiled: July 11, 2016Date of Patent: May 7, 2019Assignee: Analog Devices, Inc.Inventors: Lawrence H. Edelson, Michael Daly, Marcus O'Sullivan
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Publication number: 20180013294Abstract: In an example, a circuit for controlling at least two electronic switches in a parallel configuration between a power supply and a load. The circuit includes a control circuit to generate first and second control signals to control first and second electronic switches of the at least two electronic switches, and establish a conduction sequence of the first and second electronic switches using the first and second control signals. The circuit includes a detection circuit configured to detect a current flowing through a control terminal of the first electronic switch during a transition portion, wherein the circuit is configured to adjust the first control signal and establish the second portion of the conduction sequence in response to the detected current.Type: ApplicationFiled: July 11, 2016Publication date: January 11, 2018Inventors: Lawrence H. Edelson, Michael Daly, Marcus O'Sullivan
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Patent number: 9252757Abstract: A voltage-controlled oscillator (VCO) comprises a supply voltage node, configured to receive a supply voltage, a VCO output capacitor, configured to provide an oscillating output voltage across the capacitor, a discharge switch configured to discharge the capacitor according to an oscillation frequency of the oscillating output voltage, and a comparator circuit configured to provide, to a control terminal of the discharge switch, a control signal that is determined based on a comparison of the output voltage and a specified threshold voltage. The oscillating output voltage includes a pulse having a ramp slope that is determined as a function of a magnitude of the supply voltage, and is capable of being adjusted independently of the oscillation frequency.Type: GrantFiled: July 23, 2013Date of Patent: February 2, 2016Assignee: Analog Devices, Inc.Inventors: Hio Leong Chao, Lawrence H. Edelson
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Patent number: 9154130Abstract: A circuit to detect states of a signal is provided. The circuit comprises an input node to receive an input signal. A state detection circuit detects a state of the input signal and generates a detection signal. The state corresponds to at least one of three states. Furthermore, the detection signal generated by the state detection circuit has a level based on the detected state of the input signal. A logic discriminator circuit generates first and second state signals based at least partly on the level of the detection signal. A clock detection circuit generates a clock signal based at least partly on a sequence of logic transitions of the first and second state signals.Type: GrantFiled: September 26, 2014Date of Patent: October 6, 2015Assignee: Analog Devices, Inc.Inventors: Lawrence H. Edelson, Enrique Romero Pintado
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Publication number: 20150200666Abstract: A circuit to detect states of a signal is provided. The circuit comprises an input node to receive an input signal. A state detection circuit detects a state of the input signal and generates a detection signal. The state corresponds to at least one of three states. Furthermore, the detection signal generated by the state detection circuit has a level based on the detected state of the input signal. A logic discriminator circuit generates first and second state signals based at least partly on the level of the detection signal. A clock detection circuit generates a clock signal based at least partly on a sequence of logic transitions of the first and second state signals.Type: ApplicationFiled: September 26, 2014Publication date: July 16, 2015Inventors: Lawrence H. Edelson, Enrique Romero Pintado
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Publication number: 20150028924Abstract: A voltage-controlled oscillator (VCO) comprises a supply voltage node, configured to receive a supply voltage, a VCO output capacitor, configured to provide an oscillating output voltage across the capacitor, a discharge switch configured to discharge the capacitor according to an oscillation frequency of the oscillating output voltage, and a comparator circuit configured to provide, to a control terminal of the discharge switch, a control signal that is determined based on a comparison of the output voltage and a specified threshold voltage. The oscillating output voltage includes a pulse having a ramp slope that is determined as a function of a magnitude of the supply voltage, and is capable of being adjusted independently of the oscillation frequency.Type: ApplicationFiled: July 23, 2013Publication date: January 29, 2015Inventors: Hio Leong Chao, Lawrence H. Edelson
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Patent number: 8581440Abstract: An adaptive phase offset controller for use with a switching power converter having first and second channels. The controller includes a discriminator which detects a ‘critical condition’ in which a switching signal for the first channel transitions during a critical time interval so as to give rise to crosstalk that can corrupt the operation of the second channel's control circuit. When the discriminator detects a critical condition, a phase offset circuit offsets the phase of the first channel's switching signals, such that subsequent transitions occur outside of the critical time interval. A second discriminator and phase offset circuit are preferably employed to detect critical conditions which can give rise to crosstalk that can corrupt the operation of the first channel's control circuit.Type: GrantFiled: August 25, 2010Date of Patent: November 12, 2013Assignee: Analog Devices, Inc.Inventors: Lawrence H. Edelson, Michael P. Daly, Trey Roessig
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Patent number: 8035538Abstract: A sigma-delta converter suitable for measuring a photocurrent comprises an input node adapted to receive a current to be measured (Imeas), a capacitor connected to the input node, a clocked comparator coupled to the input node and to a reference voltage Vref at respective inputs, and a switchable current source connected to the input node which conducts a reference current Iref when switched on. The converter is arranged in a sigma-delta configuration, with the current source switched on to pull down the voltage (VCMP) at the input node when the comparator output toggles due to VCMP increasing above Vref, and to be switched off when the comparator output toggles due to VCMP falling below Vref, such that the comparator output comprises a digital bitstream which varies with Imeas.Type: GrantFiled: December 16, 2009Date of Patent: October 11, 2011Assignee: Analog Devices, Inc.Inventors: Lawrence H. Edelson, Michael P. Daly, Trey A. Roessig
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Publication number: 20110049986Abstract: An adaptive phase offset controller for use with a switching power converter having first and second channels. The controller includes a discriminator which detects a ‘critical condition’ in which a switching signal for the first channel transitions during a critical time interval so as to give rise to crosstalk that can corrupt the operation of the second channel's control circuit. When the discriminator detects a critical condition, a phase offset circuit offsets the phase of the first channel's switching signals, such that subsequent transitions occur outside of the critical time interval. A second discriminator and phase offset circuit are preferably employed to detect critical conditions which can give rise to crosstalk that can corrupt the operation of the first channel's control circuit.Type: ApplicationFiled: August 25, 2010Publication date: March 3, 2011Inventors: Lawrence H. EDELSON, Michael P. Daly, Trey Roessig
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Publication number: 20100097257Abstract: A sigma-delta converter suitable for measuring a photocurrent comprises an input node adapted to receive a current to be measured (Imeas), a capacitor connected to the input node, a clocked comparator coupled to the input node and to a reference voltage Vref at respective inputs, and a switchable current source connected to the input node which conducts a reference current Iref when switched on. The converter is arranged in a sigma-delta configuration, with the current source switched on to pull down the voltage (VCMP) at the input node when the comparator output toggles due to VCMP increasing above Vref, and to be switched off when the comparator output toggles due to VCMP falling below Vref, such that the comparator output comprises a digital bitstream which varies with Imeas .Type: ApplicationFiled: December 16, 2009Publication date: April 22, 2010Inventors: Lawrence H. EDELSON, Michael P. DALY, Trey A. ROESSIG
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Patent number: 7659840Abstract: A sigma-delta converter suitable for measuring a photocurrent comprises an input node adapted to receive a current to be measured (Imeas), a capacitor connected to the input node, a clocked comparator coupled to the input node and to a reference voltage Vref at respective inputs, and a switchable current source connected to the input node which conducts a reference current Iref when switched on. The converter is arranged in a sigma-delta configuration, with the current source switched on to pull down the voltage (VCMP) at the input node when the comparator output toggles due to VCMP increasing above Vref, and to be switched off when the comparator output toggles due to VCMP falling below Vref, such that the comparator output comprises a digital bitstream which varies with Imeas.Type: GrantFiled: February 15, 2008Date of Patent: February 9, 2010Assignee: Analog Devices, Inc.Inventors: Lawrence H. Edelson, Michael P. Daly, Trey A. Roessig
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Publication number: 20090207061Abstract: A sigma-delta converter suitable for measuring a photocurrent comprises an input node adapted to receive a current to be measured (Imeas), a capacitor connected to the input node, a clocked comparator coupled to the input node and to a reference voltage Vref at respective inputs, and a switchable current source connected to the input node which conducts a reference current Iref when switched on. The converter is arranged in a sigma-delta configuration, with the current source switched on to pull down the voltage (VCMP) at the input node when the comparator output toggles due to VCMP increasing above Vref, and to be switched off when the comparator output toggles due to VCMP falling below Vref, such that the comparator output comprises a digital bitstream which varies with Imeas.Type: ApplicationFiled: February 15, 2008Publication date: August 20, 2009Inventors: Lawrence H. Edelson, Michael P. Daly, Trey A. Roessig