Patents by Inventor Clyde Washburn
Clyde Washburn 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: 8902202Abstract: A subsystem, system and method for sensing an input object relative to a sensing region of an ultrasound sensor device are disclosed herein. In one embodiment, a subsystem for sensing an input object relative to a sensing region of an ultrasound sensor device includes a circuit, a switch coupled to an output of the circuit, and an integrating capacitor coupled to the output of the circuit. The circuit has an input for receiving a resulting signal comprising positive and negative polarities, the resulting signal having effects indicative of the input object relative to the sensing region. The integrating capacitor is also coupled to a substantially constant voltage source and to the switch. The circuit is operable to output a rectified signal to the first integrating capacitor indicative of the input object relative to a sensing region.Type: GrantFiled: April 18, 2014Date of Patent: December 2, 2014Assignee: Synaptics, IncorporatedInventors: Jeffrey A. Small, Clyde Washburn
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Patent number: 8847899Abstract: An input device processing system comprises a sensor module that transmits a first transmitter signal with a transmitter electrode and receives a resulting signal with a receiver electrode. The first transmitter signal comprises a first transmitter frequency, and the resulting signal comprises effects corresponding to the first transmitter signal. A demodulation module demodulates the resulting signal to produce a first signal (e.g., an upper sideband signal) and a second signal (a lower sideband signal), selectably determines a first measurement of a change in capacitive coupling between the transmitter electrode and the receiver electrode based on at least one of the first and second signals, and determines positional information for an input object based on the first measurement.Type: GrantFiled: September 15, 2011Date of Patent: September 30, 2014Assignee: Synaptics IncorporatedInventors: Clyde Washburn, Eric Bohannon, Imre Knausz, Kirk Hargreaves
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Publication number: 20140225873Abstract: A subsystem, system and method for sensing an input object relative to a sensing region of an ultrasound sensor device are disclosed herein. In one embodiment, a subsystem for sensing an input object relative to a sensing region of an ultrasound sensor device includes a circuit, a switch coupled to an output of the circuit, and an integrating capacitor coupled to the output of the circuit. The circuit has an input for receiving a resulting signal comprising positive and negative polarities, the resulting signal having effects indicative of the input object relative to the sensing region. The integrating capacitor is also coupled to a substantially constant voltage source and to the switch. The circuit is operable to output a rectified signal to the first integrating capacitor indicative of the input object relative to a sensing region.Type: ApplicationFiled: April 18, 2014Publication date: August 14, 2014Applicant: SYNAPTICS INCORPORATEDInventors: Jeffrey A. SMALL, Clyde WASHBURN
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Patent number: 8797094Abstract: Embodiments of the invention generally provide generating a ZTC current using resistors that may be integrated into an IC, even if these resistors vary with temperature. Specifically, instead of applying a bandgap voltage across a ZTC resistor, the bandgap voltage may be applied to a temperature-dependent resistor to generate a first current that varies (either proportionally or complementary) with temperature. Additionally, a second current may be generated which compensates for the temperature variance of the first current. If the two currents change in the same manner relative to temperature (i.e., the respective slopes of the currents are the same when the underlying circuit elements are exposed to the same temperature variations), the difference between the currents remains constant. Thus, subtracting the two currents, regardless of the current temperature, results in a ZTC current—i.e., a current that is independent of temperature variations.Type: GrantFiled: March 8, 2013Date of Patent: August 5, 2014Assignee: Synaptics IncorporatedInventors: Clyde Washburn, Eric Scott Bohannon, Brian Mott
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Patent number: 8743080Abstract: A processing system includes transmitter module, receiver module, and a demodulating module. The transmitter module comprises transmitter circuitry and is configured to simultaneously transmit a first transmitter signal with a first transmitter electrode and a second transmitter signal with a second transmitter electrode. The first transmitter signal includes a combination of a first heterodyne frequency and a carrier frequency. The second transmitter signal comprises a combination of a second heterodyne frequency and the carrier frequency. The receiver module comprise receiver circuitry and is configured to receive a first resulting signal with a receiver electrode, wherein the first resulting signal comprises first effects corresponding to the first transmitter signal and second effects corresponding to the second transmitter signal.Type: GrantFiled: June 27, 2011Date of Patent: June 3, 2014Assignee: Synaptics IncorporatedInventors: Kirk Hargreaves, Adam Schwartz, Joseph Kurth Reynolds, Clyde Washburn
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Patent number: 8730204Abstract: An input device processing system comprises a sensor module that transmits a first transmitter signal with a transmitter electrode and receives a resulting signal with a receiver electrode. The first transmitter signal comprises a first transmitter frequency, and the resulting signal comprises effects corresponding to the first transmitter signal. A demodulation module demodulates the resulting signal to produce a first signal (e.g., an upper sideband signal) and a second signal (a lower sideband signal), selectably determines a first measurement of a change in capacitive coupling between the transmitter electrode and the receiver electrode based on at least one of the first and second signals, and determines positional information for an input object based on the first measurement.Type: GrantFiled: September 15, 2011Date of Patent: May 20, 2014Assignee: Synaptics IncorporatedInventors: Clyde Washburn, Eric Bohannon, Imre Knausz, Kirk Hargreaves
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Patent number: 8711128Abstract: A subsystem, system and method for sensing an input object relative to a sensing region of an ultrasound sensor device are disclosed herein. In one embodiment, a subsystem for sensing an input object relative to a sensing region of an ultrasound sensor device includes a circuit, a switch coupled to an output of the circuit, and an integrating capacitor coupled to the output of the circuit. The circuit has an input for receiving a resulting signal comprising positive and negative polarities, the resulting signal having effects indicative of the input object relative to the sensing region. The integrating capacitor is also coupled to a substantially constant voltage source and to the switch. The circuit is operable to output a rectified signal to the first integrating capacitor indicative of the input object relative to a sensing region.Type: GrantFiled: November 4, 2011Date of Patent: April 29, 2014Assignee: Synaptics IncorporatedInventors: Jeffrey A. Small, Clyde Washburn
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Patent number: 8391352Abstract: A method and apparatus by which ATSC-receiver-compatible digital TV signals may be generated without most of the discrete and/or high-complexity components required by the ATSC specification, through the use of a precomputation of digital filter coefficients that consolidates multiple functions into a single step, and through the derivation of multiple required carrier frequencies using a single oscillator circuit. The resulting design meets all requirements of the ATSC specification, reducing significantly the cost of the necessary signal-processing functions, and in a manner compatible with the VLSI (very-large-scale-integrated) circuit technologies of the field.Type: GrantFiled: May 13, 2008Date of Patent: March 5, 2013Assignee: Integre Technologies, Inc.Inventor: Clyde Washburn
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Publication number: 20120326910Abstract: A processing system includes transmitter module, receiver module, and a demodulating module. The transmitter module comprises transmitter circuitry and is configured to simultaneously transmit a first transmitter signal with a first transmitter electrode and a second transmitter signal with a second transmitter electrode. The first transmitter signal includes a combination of a first heterodyne frequency and a carrier frequency. The second transmitter signal comprises a combination of a second heterodyne frequency and the carrier frequency. The receiver module comprise receiver circuitry and is configured to receive a first resulting signal with a receiver electrode, wherein the first resulting signal comprises first effects corresponding to the first transmitter signal and second effects corresponding to the second transmitter signal.Type: ApplicationFiled: June 27, 2011Publication date: December 27, 2012Applicant: SYNAPTICS INCORPORATEDInventors: Kirk Hargreaves, Adam Schwartz, Joseph Kurth Reynolds, Clyde Washburn
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Publication number: 20120111119Abstract: A subsystem, system and method for sensing an input object relative to a sensing region of an ultrasound sensor device are disclosed herein. In one embodiment, a subsystem for sensing an input object relative to a sensing region of an ultrasound sensor device includes a circuit, a switch coupled to an output of the circuit, and an integrating capacitor coupled to the output of the circuit. The circuit has an input for receiving a resulting signal comprising positive and negative polarities, the resulting signal having effects indicative of the input object relative to the sensing region. The integrating capacitor is also coupled to a substantially constant voltage source and to the switch. The circuit is operable to output a rectified signal to the first integrating capacitor indicative of the input object relative to a sensing region.Type: ApplicationFiled: November 4, 2011Publication date: May 10, 2012Applicant: Synaptics IncorporatedInventors: Jeffrey A. Small, Clyde Washburn
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Publication number: 20120068949Abstract: An input device processing system comprises a sensor module that transmits a first transmitter signal with a transmitter electrode and receives a resulting signal with a receiver electrode. The first transmitter signal comprises a first transmitter frequency, and the resulting signal comprises effects corresponding to the first transmitter signal. A demodulation module demodulates the resulting signal to produce a first signal (e.g., an upper sideband signal) and a second signal (a lower sideband signal), selectably determines a first measurement of a change in capacitive coupling between the transmitter electrode and the receiver electrode based on at least one of the first and second signals, and determines positional information for an input object based on the first measurement.Type: ApplicationFiled: September 15, 2011Publication date: March 22, 2012Applicant: SYNAPTICS INCORPORATEDInventors: Clyde Washburn, Eric Bohannon, Imre Knausz, Kirk Hargreaves
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Publication number: 20120068966Abstract: An input device processing system comprises a sensor module that transmits a first transmitter signal with a transmitter electrode and receives a resulting signal with a receiver electrode. The first transmitter signal comprises a first transmitter frequency, and the resulting signal comprises effects corresponding to the first transmitter signal. A demodulation module demodulates the resulting signal to produce a first signal (e.g., an upper sideband signal) and a second signal (a lower sideband signal), selectably determines a first measurement of a change in capacitive coupling between the transmitter electrode and the receiver electrode based on at least one of the first and second signals, and determines positional information for an input object based on the first measurement.Type: ApplicationFiled: September 15, 2011Publication date: March 22, 2012Applicant: SYNAPTICS INCORPORATEDInventors: Clyde Washburn, Eric Bohannon, Imre Knausz, Kirk Hargreaves
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Patent number: 7860189Abstract: Disclosed are hybrid heterodyne transmitters and receivers for use in communications systems, or other systems, and the corresponding methods for hybrid heterodyne transmitting and receiving. A heterodyne receiver for converting a continuous time modulated signal to a discrete time digital baseband signal includes a sigma-delta modulator. The sigma-delta modulator is a sigma-delta analog-to-digital converter constructed and arranged to receive a modulated signal at an RF carrier frequency and provide a quantized output at a first intermediate frequency. The heterodyne receiver may also include a digital mixer constructed and arranged to receive a data stream quantized by the sigma-delta analog-to-digital converter and receive a signal at a second mixing frequency. The digital mixer then provides digital signals representative of a baseband signal suitable for digital signal processing.Type: GrantFiled: August 19, 2005Date of Patent: December 28, 2010Assignee: Intrinsix CorporationInventors: Eugene M. Petilli, Brian Jadus, Clyde Washburn, John M. Alvermann
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Publication number: 20090284663Abstract: A method and apparatus by which ATSC-receiver-compatible digital TV signals may be generated without most of the discrete and/or high-complexity components required by the ATSC specification, through the use of a precomputation of digital filter coefficients that consolidates multiple functions into a single step, and through the derivation of multiple required carrier frequencies using a single oscillator circuit. The resulting design meets all requirements of the ATSC specification, reducing significantly the cost of the necessary signal-processing functions, and in a manner compatible with the VLSI (very-large-scale-integrated) circuit technologies of the field.Type: ApplicationFiled: May 13, 2008Publication date: November 19, 2009Applicant: Integre Technologies, LLCInventor: Clyde Washburn
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Publication number: 20070001748Abstract: A bandgap reference voltage generating circuit includes a proportional to absolute temperature (PTAT) voltage generating means generating a PTAT voltage. A complementary to absolute temperature (CTAT) voltage generating means generates a CTAT voltage. A temperature coefficient determining means interconnects the PTAT voltage generating means and the CTAT voltage generating means.Type: ApplicationFiled: September 8, 2006Publication date: January 4, 2007Inventor: Clyde Washburn
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Patent number: 7113025Abstract: A bandgap reference voltage generating circuit includes a proportional to absolute temperature (PTAT) voltage generating means generating a PTAT voltage. A complementary to absolute temperature (CTAT) voltage generating means generates a CTAT voltage. A temperature coefficient determining means interconnects the PTAT voltage generating means and the CTAT voltage generating means.Type: GrantFiled: July 7, 2004Date of Patent: September 26, 2006Assignee: Raum Technology Corp.Inventor: Clyde Washburn
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Publication number: 20060111074Abstract: Disclosed are hybrid heterodyne transmitters and receivers for use in communications systems, or other systems, and the corresponding methods for hybrid heterodyne transmitting and receiving. A heterodyne receiver for converting a continuous time modulated signal to a discrete time digital baseband signal includes a sigma-delta modulator. The sigma-delta modulator is a sigma-delta analog-to-digital converter constructed and arranged to receive a modulated signal at an RF carrier frequency and provide a quantized output at a first intermediate frequency. The heterodyne receiver may also include a digital mixer constructed and arranged to receive a data stream quantized by the sigma-delta analog-to-digital converter and receive a signal at a second mixing frequency. The digital mixer then provides digital signals representative of a baseband signal suitable for digital signal processing.Type: ApplicationFiled: August 19, 2005Publication date: May 25, 2006Inventors: Eugene Petilli, Brian Jadus, Clyde Washburn, John Alvermann
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Publication number: 20050231270Abstract: A bandgap reference voltage generating circuit includes a proportional to absolute temperature (PTAT) voltage generating means generating a PTAT voltage. A complementary to absolute temperature (CTAT) voltage generating means generates a CTAT voltage. A temperature coefficient determining means interconnects the PTAT voltage generating means and the CTAT voltage generating means.Type: ApplicationFiled: July 7, 2004Publication date: October 20, 2005Inventor: Clyde Washburn
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Patent number: 6606007Abstract: A circuit and method are disclosed herein for a crystal oscillator, wherein the Q of the resonant network is not reduced through the loading effects of the oscillator's resistive bias network. The oscillator is configured as an operational transconductance amplifier (OTA) coupled to the resonant network. The OTA creates a negative resistance, which compensates for energy lost to resistance within the resonant network, thereby sustaining oscillation at the resonant frequency. Instead of using bias resistors to set and maintain the operating point of the oscillator, another OTA (with a high output impedance) injects a current into the resonant network to bias the oscillator. Advantageously, this technique avoids the reduction in Q that occurs when bias resistors are connected across the high effective parallel resistance of the resonant crystal. The higher Q benefits frequency stability and phase jitter characteristics of the oscillator.Type: GrantFiled: July 31, 2001Date of Patent: August 12, 2003Assignee: LSI Logic CorporationInventor: Clyde Washburn
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Patent number: 6593825Abstract: An oscillator provides output signals over a range of oscillating frequencies includes an resonant circuit, at least one active circuit device operatively coupled to the resonant circuit to supply energy to the resonant circuit, and at least one unidirectional device coupled to the active circuit device. The unidirectional device permits current to flow between the active circuit device and the resonant circuit when the active circuit device adds energy to the resonant circuit, and impedes a drain of energy from the resonant circuit due to increased output signal amplitude.Type: GrantFiled: September 6, 2001Date of Patent: July 15, 2003Assignee: LSI Logic CorporationInventor: Clyde Washburn