Systems and methods for operating secure elliptic curve cryptosystems
Granted: November 9, 2021
Patent Number:
11171780
Various embodiments of the invention implement countermeasures designed to withstand attacks by potential intruders who seek partial or full retrieval of elliptic curve secrets by using Various embodiments of the invention implement countermeasures designed to withstand attacks by potential intruders who seek partial or full retrieval of elliptic curve secrets by using known methods that exploit system vulnerabilities, including elliptic operation differentiation, dummy operation…
Physiological condition determination system
Granted: November 9, 2021
Patent Number:
11166799
A physiological condition determination system and method can include: attaching a tag to animal tissue; emitting light into the animal tissue; detecting a first optical signal; extracting a first measurement of peripheral capillary oxygen saturation from the first optical signal; qualifying the first measurement of peripheral capillary oxygen saturation as a baseline; detecting a second optical signal with the optical sensor; extracting a second measurement of peripheral capillary…
Dynamic debuzzer for speakers
Granted: October 19, 2021
Patent Number:
11153684
The implementations describe a method and a system to perform the method to reduce buzzing in a speaker by obtaining a signal having an audio content, determining a first value of spectral density of the audio content at a first resonance frequency, the first resonance frequency associated with a mechanical motion of at least one member of a speaker assembly, determining a second value of spectral density of the audio content at a second resonance frequency, the second resonance…
Heart rate and blood oxygen monitoring system
Granted: October 12, 2021
Patent Number:
11141075
An integrated circuit device includes an insulating body provided with a number of electrically conductive leads and having a surface provided with a red LED aperture, an IR LED aperture and a photodetector aperture. The insulating body also includes an optical isolator optically separating the photodetector aperture from the red LED aperture and the IR LED aperture. A red LED is aligned with the red LED aperture, an IR LED is aligned with the IR LED aperture, and a photodetector is…
Management of low frequency components of an audio signal at a mobile computing device
Granted: October 5, 2021
Patent Number:
11140483
A mobile computing device includes a digital signal processor, a first speaker having a first sensitivity and a second speaker having a second sensitivity, where the second sensitivity is greater than the first sensitivity. The digital signal processor includes an audio signal manager that is configured to receive an audio signal having first and second channel signals, partition the first channel signal into a first high frequency signal and a first low frequency signal, partition the…
Integrated standard-compliant data acquisition device
Granted: September 28, 2021
Patent Number:
11130406
An integrated standard-compliant data acquisition device includes an electrically insulating package including a plurality of conductive leads and an integrated circuit (IC) disposed within the electrically insulating package and electrically coupled to at least some of the plurality of conductive leads. The IC includes a first multiplexer (MUX), a second MUX, a third MUX, an analog-to-digital converter (ADC), a plurality of registers, a fourth MUX, control logic, and communication…
Pin encoded mode selection system
Granted: September 21, 2021
Patent Number:
11128094
A method and apparatus can include: audio interface pins coupled to swappable connections including a BCLK, an LRCLK, a DIN, and a DOUT; a BCLK determiner configured to identify the BCLK as the swappable connection with a highest frequency; an LRCLK determiner configured to: measure cycle lengths, compare the cycle lengths to a pre-defined multiple, identify the LRCLK as the swappable connections, and output an association between the LRCLK and one of the audio interface pins; and a mode…
Method for in situ calibration of implantable sensors
Granted: September 14, 2021
Patent Number:
11116429
A subcutaneous sensor system includes a sensor, a plurality of reservoirs, a plurality of pumps, a mixer provided with a plurality of mixer inlets and a mixer outlet, and a controller having an input coupled to the sensor output and a plurality of control outputs coupled to the plurality of pumps and the mixer. In certain embodiments, the system further includes an enclosure for the reservoirs, the pumps, the mixer and the controller, e.g. in the form of a skin patch or in the form of an…
Systems and methods for masking RSA operations
Granted: September 7, 2021
Patent Number:
11115210
Presented are systems and methods for protecting secret data that is stored in memory to prevent unauthorized access and data manipulation. Various embodiments may be applied to hide or mask an RSA exponent used for public key cryptography and stored in a cryptographic hardware block that uses a non-erasable working memory for computations. In certain embodiments, masking RSA exponents is accomplished by a two-step process that combines a specifically calculated, random and secret value…
Systems and methods for asymmetric image splitter with line mark memory
Granted: September 7, 2021
Patent Number:
11115623
Described herein are systems and methods that provide for implement an asymmetric image splitter engine that may reduce the memory requirements. In one or more embodiments, a method may comprise receiving a multi-streaming video comprising super-frame video images, where each super-frame video images includes a first video image and a second video image, and where the height of the first video image is higher than the second video image. The vertical asymmetry of the second video image…
Encryption-based security protection for processors
Granted: August 31, 2021
Patent Number:
RE48716
Methods, systems, and arrangements enable increased security for a processor, including by implementing block encryption. The block may include multiple instructions and/or operations to be executed by the processor. The block may also include multiple bytes that are read into the processor byte by byte. Once a block-wide encrypted buffer has been filled from an external memory source, the block may be decrypted using an encryption algorithm (e.g., the Data Encryption Standard (DES), the…
Multi-level switching power converters including bypass transistors and associated methods
Granted: August 10, 2021
Patent Number:
11088620
A multi-level switching power converter includes a string of N upper transistors and a string of N lower transistors, where N is an integer greater than one. The N upper transistors are electrically coupled in series between a first power node and a switching node, and the N lower transistors are electrically coupled in series between the switching node and a reference node. The multi-level switching power converter further includes N?1 flying capacitors, an inductor, a bypass…
Ultrasound sub-array receiver beamformer
Granted: August 10, 2021
Patent Number:
11086002
An ultrasound method and apparatus can include: transducer elements arranged in a sub-array for generating analog signals based on a return signal detected by the transducer elements during a receive interval; analog delay lines including individual delays unique to each of the transducer elements and calculated based on a linear delay slope for delaying the analog signals; an analog to digital converter for converting the analog signals to a digital signal; a digital beamformer with a…
Method and apparatus for driving a piezoelectric transducer with stored charge recovery
Granted: August 3, 2021
Patent Number:
11081635
A piezo driver system including a driver including a switching amplifier coupling a power port to a driver port, a battery coupled to the power port, a piezo device coupled to the driver port, where the switching amplifier provides a filtered driver signal to the driver port and returns stored charge from the piezo device to the battery. A method for driving a piezo device includes multiplying an input signal by an oscillator signal to provide a control signal, controlling a switching…
Device and method for temperature correction using a proximity sensor in a non-contact thermopile thermometer
Granted: July 20, 2021
Patent Number:
11067452
A temperature measurement device having a thermopile temperature sensor and a proximity sensor, a mobile temperature measurement device, and a method for determining a corrected temperature with a temperature measurement device are described. In an implementation, a temperature measurement device includes a semiconductor device; a thermopile temperature sensor disposed on the semiconductor device, where the thermopile temperature sensor is configured to receive radiation from an object;…
Battery cell analyzer
Granted: July 13, 2021
Patent Number:
11061076
An integrated circuit device includes a controller, a voltage source coupled to the controller, a voltage sampler coupled to the controller, a low current detector coupled to the controller; and memory coupled to the controller, where memory includes code segments executable by the controller for: (a) measuring a cell voltage to determine an initial voltage; (b) holding the cell voltage at the initial voltage using a power source; and (c) determining the leakage current of the cell by…
Systems and methods for gate driver with field-adjustable UVLO
Granted: July 6, 2021
Patent Number:
11056875
Systems and methods for gate driver with field-adjustable undervoltage lockout (UVLO) are disclosed. A gate driver system comprises a control circuit and a driver circuit. The driver circuit incorporates a field-adjustable UVLO, a control logic, and an inverter. The level of the field-adjustable UVLO is adjustable by an external circuit, which can be a resistor based voltage divider. By setting the UVLO level externally adjustable and by moving a reference ground to the external voltage…
Method and apparatus for controlling a multichannel TDM device
Granted: June 15, 2021
Patent Number:
11038611
A method for developing TDM data with embedded control data includes obtaining signal data and control data, formatting the signal data and the control data into a plurality of channels of a DIN signal, and transmitting the DIN signal on one line of a 3-bit TDM bus. A multichannel input device includes a control extractor receptive to the three-bit TDM bus and operative to extract CNTL data from the DIN data, a DAI receptive to the 3-bit TDM bus and the channel select input and operative…
System and method for reducing power consumption in an audio system by disabling filter elements based on signal level
Granted: June 15, 2021
Patent Number:
11036462
An audio system includes a digital audio interface, a first filter stage, a second filter stage, a controller, and a first path selector. The controller is communicatively coupled to the digital audio interface and configured to determine whether an audio signal received at the digital audio interface is below a first signal threshold. The controller selects one of a first signal path that passes through the first and second filter stages and a second signal path that bypasses the first…
Software intellectual property protection systems and methods for embedded platforms
Granted: June 1, 2021
Patent Number:
11023567
Presented are software intellectual property (IP) protection systems and methods that prevent potential attackers as well as customers from having access to plain text versions of both library source code and binary code. Potential attackers are prevented from reusing the software on other platforms. The protection mechanism does not impact the functionality or the performance of the library itself and does not interfere with existing software update mechanisms or application developer…
