Patents by Inventor Arup Polley
Arup Polley 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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Publication number: 20160293834Abstract: Described examples include graphene Hall sensors, magnetic sensor systems and methods for sensing a magnetic field using an adjustable gate voltage to adapt the Hall sensor magnetic field sensitivity according to a control input for environmental or process compensation and/or real-time adaptation for balancing power consumption and minimum detectable field performance. The graphene Hall sensor gate voltage can be modulated and the sensor output signal can be demodulated to combat flicker or other low frequency noise. Also, graphene Hall sensors can be provided with capacitive coupled contacts for reliable low impedance AC coupling to instrumentation amplifiers or other circuits using integral capacitance.Type: ApplicationFiled: April 1, 2015Publication date: October 6, 2016Applicant: Texas Instruments IncorporatedInventors: Arup Polley, Archana Venugopal, Robert Reid Doering, Luigi Colombo
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Publication number: 20160235313Abstract: The circuitry of an optical receiver reduces the ambient DC component and the pleth DC component to leave a pleth signal with substantially only a pleth AC component. The circuitry also provides gain control and can provide transmit power control to change the range of the pleth AC component to occupy a desired input range of an analog-to-digital converter.Type: ApplicationFiled: August 27, 2015Publication date: August 18, 2016Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: Ajit Sharma, Sriram Narayanan, Srinath Mathur Ramaswamy, Arup Polley, Seung Bae Lee, Wen Li
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Patent number: 9397685Abstract: Described examples include low power analog front end circuits for sensing repeating signal waveforms, including a first sampling circuit to sample an input signal, an analog detector circuit to provide a detector output signal representing a feature of the input signal, a second sampling circuit to sample the detector output signal, and a control circuit to control a sample rate or other analog front end operating parameter at least partially according to the sampled detector output signal, and to selectively enable and disable the analog detector circuit at least partially according to a model representing an expected repeating waveform of the input signal.Type: GrantFiled: July 23, 2015Date of Patent: July 19, 2016Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Sriram Narayanan, Srinath Mathur Ramaswamy, Arup Polley, Ajit Sharma
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Patent number: 9319059Abstract: The silicon real estate required for the semiconductor fabrication of a calibrated capacitor-based successive approximation register (SAR) analog-to-digital converter (ADC) (100) is substantially reduced by using a number of shared capacitors (SC1-SCs?1) which are used as calibration capacitors when operating in a calibration mode and as bit capacitors when operating in a normal mode.Type: GrantFiled: June 6, 2015Date of Patent: April 19, 2016Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Ajit Sharma, Seung Bae Lee, Srinath Mathur Ramaswamy, Sriram Narayanan, Arup Polley
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Patent number: 9148159Abstract: An analog-to-digital converter (ADC) includes a first comparator, a second comparator, and a decision timing comparison logic unit. The first comparator is configured to output a first output voltage and the second comparator is configured to output a second output voltage during a same binary algorithmic iteration of the ADC. The decision timing comparison logic unit is configured to identify a first polarity of the first output voltage and a second polarity of the second output voltage and, if the first polarity is equivalent to a second polarity, to insert at least one redundant capacitor for a next binary algorithmic iteration of the ADC.Type: GrantFiled: March 13, 2014Date of Patent: September 29, 2015Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Ajit Sharma, Seung Bae Lee, Srinath M. Ramaswamy, Sriram Narayanan, Arup Polley
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Publication number: 20150263744Abstract: An analog-to-digital converter (ADC) includes a first comparator, a second comparator, and a decision timing comparison logic unit. The first comparator is configured to output a first output voltage and the second comparator is configured to output a second output voltage during a same binary algorithmic iteration of the ADC. The decision timing comparison logic unit is configured to identify a first polarity of the first output voltage and a second polarity of the second output voltage and, if the first polarity is equivalent to a second polarity, to insert at least one redundant capacitor for a next binary algorithmic iteration of the ADC.Type: ApplicationFiled: March 13, 2014Publication date: September 17, 2015Applicant: Texas Instruments IncorporatedInventors: Ajit Sharma, Seung Bae Lee, Srinath M. Ramaswamy, Sriram Narayanan, Arup Polley
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Publication number: 20140368944Abstract: A circuit includes an input that receives a current that increases as a tunneling current sensor moves closer to a media. A high gain path is operatively coupled to the input to amplify the received current as a first amplified output. The first amplified output increases until a saturation threshold is attained for the high gain path. Further increases in the received current beyond the saturation threshold are diverted from the input as an overflow current. A low gain path is operatively coupled to the input to amplify the overflow current as a second amplified output. The second amplified output increases with the overflow current as the tunneling current sensor continues to move closer to the media.Type: ApplicationFiled: June 3, 2014Publication date: December 18, 2014Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: ARUP POLLEY, Pankaj Pandey, Bryan Bloodworth
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Patent number: 8896950Abstract: A circuit includes an input that receives a current that increases as a tunneling current sensor moves closer to a media. A high gain path is operatively coupled to the input to amplify the received current as a first amplified output. The first amplified output increases until a saturation threshold is attained for the high gain path. Further increases in the received current beyond the saturation threshold are diverted from the input as an overflow current. A low gain path is operatively coupled to the input to amplify the overflow current as a second amplified output. The second amplified output increases with the overflow current as the tunneling current sensor continues to move closer to the media.Type: GrantFiled: June 3, 2014Date of Patent: November 25, 2014Assignee: Texas Instruments IncorporatedInventors: Arup Polley, Pankaj Pandey, Bryan Bloodworth
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Patent number: 8710904Abstract: Apparatus and methods disclosed herein implement a MOS resistor using the current channel of a MOS transistor. The MOS resistance R(DS) is dependent upon MOS transistor geometry and nominal gate voltage. MOS resistor terminal-to-gate voltages are averaged and applied to the MOS transistor gate such as to maintain the MOS resistor terminal voltage to current ratio, resulting in a substantially constant R(DS). R(DS) is also compensated for temperature and process variations by adjusting gate voltages via negative feedback methods.Type: GrantFiled: December 27, 2012Date of Patent: April 29, 2014Assignee: Texas Instruments IncorporatedInventor: Arup Polley
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Publication number: 20140049314Abstract: Apparatus and methods disclosed herein implement a MOS resistor using the current channel of a MOS transistor. The MOS resistance R(DS) is dependent upon MOS transistor geometry and nominal gate voltage. MOS resistor terminal-to-gate voltages are averaged and applied to the MOS transistor gate such as to maintain the MOS resistor terminal voltage to current ratio, resulting in a substantially constant R(DS). R(DS) is also compensated for temperature and process variations by adjusting gate voltages via negative feedback methods.Type: ApplicationFiled: December 27, 2012Publication date: February 20, 2014Applicant: TEXAS INSTRUMENTS INCORPORATEDInventor: Arup Polley
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Patent number: 8508876Abstract: A data storage system for detecting a location of a head relative to a magnetic media is described. This system comprises arms, a preamplifier circuit coupled to the arms for controlling the arms, a proximity sensing system positioned within the preamplifier circuit, the proximity sensing system comprising: an input stage for transmitting an input sense signal; a programmable gain stage coupled to receive the input sense signal and operative for transmitting a gain signal in response to receiving the input sense signal; a multiplexer coupled to receive the gain signal and at least one control signal, the multiplexer operative for transmitting a multiplexed signal; a detector coupled to receive the multiplexed signal and a second control signal, the detector operative for transmitting an output signal; wherein an amplitude associated with the output signal enables detecting the location of the head.Type: GrantFiled: December 12, 2012Date of Patent: August 13, 2013Assignee: Texas Instruments IncorporatedInventors: Arup Polley, Rajarshi Mukhopadhyay, Reza Sharifi, Mark A. Wolfe
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Patent number: 8369190Abstract: A data storage system for detecting a location of a head relative to a magnetic media is described. This system comprises arms, a preamplifier circuit coupled to the arms for controlling the arms, a proximity sensing system positioned within the preamplifier circuit, the proximity sensing system comprising: an input stage for transmitting an input sense signal; a programmable gain stage coupled to receive the input sense signal and operative for transmitting a gain signal in response to receiving the input sense signal; a multiplexer coupled to receive the gain signal and at least one control signal, the multiplexer operative for transmitting a multiplexed signal; a detector coupled to receive the multiplexed signal and a second control signal, the detector operative for transmitting an output signal; wherein an amplitude associated with the output signal enables detecting the location of the head.Type: GrantFiled: April 4, 2011Date of Patent: February 5, 2013Assignee: Texas Instruments IncorporatedInventors: Arup Polley, Rajarshi Mukhopadhyay, Reza Sharifi, Mark A. Wolfe
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Publication number: 20120250484Abstract: A data storage system for detecting a location of a head relative to a magnetic media is described. This system comprises arms, a preamplifier circuit coupled to the arms for controlling the arms, a proximity sensing system positioned within the preamplifier circuit, the proximity sensing system comprising: an input stage for transmitting an input sense signal; a programmable gain stage coupled to receive the input sense signal and operative for transmitting a gain signal in response to receiving the input sense signal; a multiplexer coupled to receive the gain signal and at least one control signal, the multiplexer operative for transmitting a multiplexed signal; a detector coupled to receive the multiplexed signal and a second control signal, the detector operative for transmitting an output signal; wherein an amplitude associated with the output signal enables detecting the location of the head.Type: ApplicationFiled: April 4, 2011Publication date: October 4, 2012Inventors: Arup Polley, Rajarshi Mukhopadhyay, Reza Sharifi, Mark A. Wolfe