Patents by Inventor David S Clarke
David S Clarke 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: 11942516Abstract: Disclosed herein are quantum dot devices, as well as related computing devices and methods. For example, in some embodiments, a quantum dot device may include: a quantum well stack; a first gate above the quantum well stack, wherein the first gate includes a first gate metal and a first gate dielectric; and a second gate above the quantum well stack, wherein the second gate includes a second gate metal and a second gate dielectric, and the first gate is at least partially between a portion of the second gate and the quantum well stack.Type: GrantFiled: March 25, 2022Date of Patent: March 26, 2024Assignee: Intel CorporationInventors: Nicole K. Thomas, Ravi Pillarisetty, Kanwaljit Singh, Hubert C. George, David J. Michalak, Lester Lampert, Zachary R. Yoscovits, Roman Caudillo, Jeanette M. Roberts, James S. Clarke
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Patent number: 9167377Abstract: A method and apparatus is disclosed to compensate for overshoot and/or undershoot in a transmission sequence by shaping the transmission sequence according to a shaping envelope to lengthen its rise time and/or fall time to provide a modified transmission sequence. The shaping envelope may represent a trigonometric function, a polynomial function, a piecewise function or any other function that lengthens the rise time and/or the fall time of the transmission sequence. The modified transmission sequence adjusts an impedance of an antenna to load modulate a carrier wave that is inductively coupled to it.Type: GrantFiled: September 5, 2014Date of Patent: October 20, 2015Assignee: Broadcom CorporationInventor: David S. Clarke
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Publication number: 20140378053Abstract: A method and apparatus is disclosed to compensate for overshoot and/or undershoot in a transmission sequence by shaping the transmission sequence according to a shaping envelope to lengthen its rise time and/or fall time to provide a modified transmission sequence. The shaping envelope may represent a trigonometric function, a polynomial function, a piecewise function or any other function that lengthens the rise time and/or the fall time of the transmission sequence. The modified transmission sequence adjusts an impedance of an antenna to load modulate a carrier wave that is inductively coupled to it.Type: ApplicationFiled: September 5, 2014Publication date: December 25, 2014Applicant: Broadcom CorporationInventor: David S. CLARKE
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Patent number: 8831515Abstract: A method and apparatus is disclosed to compensate for overshoot and/or undershoot in a transmission sequence by shaping the transmission sequence according to a shaping envelope to lengthen its rise time and/or fall time to provide a modified transmission sequence. The shaping envelope may represent a trigonometric function, a polynomial function, a piecewise function or any other function that lengthens the rise time and/or the fall time of the transmission sequence. The modified transmission sequence adjusts an impedance of an antenna to load modulate a carrier wave that is inductively coupled to it.Type: GrantFiled: October 12, 2011Date of Patent: September 9, 2014Assignee: Broadcom CorporationInventor: David S. Clarke
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Patent number: 8761666Abstract: A method and apparatus is disclosed to compensate for overshoot and/or undershoot in a transmission sequence by shaping the transmission sequence according to a shaping envelope to lengthen its rise time and/or fall time to provide a modified transmission sequence. The shaping envelope may represent a trigonometric function, a polynomial function, a piecewise function or any other function that lengthens the rise time and/or the fall time of the transmission sequence. The modified transmission sequence adjusts an impedance of an antenna to load modulate a carrier wave that is inductively coupled to it.Type: GrantFiled: October 12, 2011Date of Patent: June 24, 2014Assignee: Broadcom CorporationInventor: David S. Clarke
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Patent number: 8725070Abstract: A method and apparatus is disclosed to compensate for overshoot and/or undershoot in a transmission sequence by shaping the transmission sequence according to a shaping envelope to lengthen its rise time and/or fall time to provide a modified transmission sequence. The shaping envelope may represent a trigonometric function, a polynomial function, a piecewise function or any other function that lengthens the rise time and/or the fall time of the transmission sequence. The modified transmission sequence adjusts an impedance of an antenna to load modulate a carrier wave that is inductively coupled to it.Type: GrantFiled: October 12, 2011Date of Patent: May 13, 2014Assignee: Broadcom CorporationInventor: David S. Clarke
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Publication number: 20130095752Abstract: A method and apparatus is disclosed to compensate for overshoot and/or undershoot in a transmission sequence by shaping the transmission sequence according to a shaping envelope to lengthen its rise time and/or fall time to provide a modified transmission sequence. The shaping envelope may represent a trigonometric function, a polynomial function, a piecewise function or any other function that lengthens the rise time and/or the fall time of the transmission sequence. The modified transmission sequence adjusts an impedance of an antenna to load modulate a carrier wave that is inductively coupled to it.Type: ApplicationFiled: October 12, 2011Publication date: April 18, 2013Applicant: BROADCOM CORPORATIONInventor: David S. CLARKE
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Publication number: 20130084802Abstract: A near field communication (NFC) device operating in a tag emulator mode, including a controller to output a control signal to control operation of a transistor, a waveform shaper to shape the control signal and to generate a shaped signal by increasing a rise time and a fall time of the control signal, and the transistor to receive the shaped signal and to output a switching waveform to drive an antenna of the NFC device.Type: ApplicationFiled: September 30, 2011Publication date: April 4, 2013Applicant: Broadcom CorporationInventor: David S. Clarke
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Patent number: 6667342Abstract: Compounds of formula (I), pharmaceutically acceptable salts or in vivo hydrolysable esters thereof, wherein: Ring X is phenyl or a six membered heteroaryl ring containing one or two ring nitrogens where said nitrogens are optionally oxidised to form the N-oxide; R1 and R2 are substituents as defined within; R3 and R4 are defined within and are alkyl or halo alkyl or together form a halocycloalkyl ring; R5 is a substituent as defined within; Y—Z is a linking group as defined within; are useful in the production of a elevation of PDH activity in a warm-blooded animal such as a human being. Pharmaceutical compositions, methods and processes for preparation of compounds of formula (I) are described.Type: GrantFiled: August 22, 2000Date of Patent: December 23, 2003Assignee: Astrazeneca ABInventors: David S Clarke, Jeremy N Burrows, Paul Ro Whittamore, Roger J Butlin, Thorsten Nowak
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Patent number: 5874862Abstract: A phase-locked loop employing a charge pump 7 for synthesizing RF channels permits a low supply voltage to be used by using two amplifier stages 5a, 5b, between the charge pump and a VCO4. Stage 5a may be a high impedance common emitter pair of complementary transistors allowing a wide voltage swing. Stage 5b may be an operational amplifier with resistive feedback to provide gain less than unity and a low impedance output to provide feedback around a loop filter 6 to source the current from charge pump 7 entering an inverting input of stage 5a. Alternatively, stages 5a, 5b may be reversed.Type: GrantFiled: March 31, 1997Date of Patent: February 23, 1999Assignee: Plessey Semiconductors LimitedInventors: David S Clarke, Ian G. Fobbester
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Patent number: 5157341Abstract: A phase detector for a phase locked loop frequency synthesizer, in which frequency-divided signals from a variable frequency oscillator and a reference oscillator are used to trigger respective ramp waveform generators, and a sample pulse generator is arranged to be responsive to the reference ramp waveform to provide sample pulses centered at the mid-point of that ramp waveform to respective sample and hold circuits, the relative phases of the ramp waveforms being determined from the sampled and held voltages.Type: GrantFiled: August 10, 1990Date of Patent: October 20, 1992Assignee: Plessey Overseas LimitedInventors: Ian G. Fobbester, David S. Clarke