Maxim Integrated Patent Applications

POWER ADAPTIVE DUAL MODE CARD EMULATION SYSTEM FOR NFC AND RFID APPLICATION

Granted: June 1, 2017
Application Number: 20170155429
An adaptive dual mode card emulation system (in Card Emulation Mode or PICC design) within an NFC device is disclosed to solve the strong field power delivering issue and also achieve longer communication range. The NFC device may be a NFC tag or an electronic device (such as a smartphone) operated in a card emulation mode. The NFC device comprises an antenna used for wireless communication. The adaptive dual mode card emulation system comprises a passive load modulation (PLM) module, an…

ORIENTATION AWARE AUDIO SOUNDSTAGE MAPPING FOR A MOBILE DEVICE

Granted: January 26, 2017
Application Number: 20170026772
A mobile device with orientation aware audio mapping capability is disclosed. The mobile device has an aux speaker, a loud speaker, a sensor for device orientation detection, and a processor (or processors) coupled to the sensor and the speakers. Depending on the device orientation, the processor sends a mapped audio output to the speakers. The mapped audio output may be a mono audio signal or a stereo audio signal. The stereo audio output signal may be a stereo audio output signal with…

SYSTEMS AND METHODS FOR AUTHENTICATION BASED ON PHYSICALLY UNCLONABLE FUNCTIONS

Granted: January 5, 2017
Application Number: 20170005811
Presented are systems, devices, and methods for reliably authenticating asymmetric cryptography-based ICs based on Physically Unclonable Functions (PUFs) that are immune to reverse engineering. Various embodiments of the invention enhance the level of security in IC architectures without the need to connect to a remote certification authority, thereby, eliminating shortfalls associated with online authentication. Certain embodiments accomplish this by using a PUF-generated secure private…

MOBILE PERSONAL POINT-OF-SALE TERMINAL

Granted: September 22, 2016
Application Number: 20160275478
A customer mobile personal point-of-sale terminal (CMPPT) includes a Point-Of-Sale (POS) sleeve portion that slidingly engages, and couples to, a cellular telephone. The cellular telephone is used to communicate encrypted information between a financial transaction verification entity (FTVE) and the POS sleeve portion. The sleeve portion includes a mechanism for reading in a merchant account number at the point-of-sale, and for communicating in a secure encrypted fashion with the FTVE…

SYSTEMS AND METHODS FOR OPERATING SECURE ELLIPTIC CURVE CRYPTOSYSTEMS

Granted: September 22, 2016
Application Number: 20160277178
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 detection, lattice attacks, and first real operation detection. Various embodiments of the invention provide resistance against side-channel attacks, such as sample power analysis, caused by…

BACKWARD COMPATIBLE SYSTEM AND METHOD FOR USING 4P AUDIO JACK TO PROVIDE POWER AND SIGNAL TO HEADSET WITH ACTIVE NOISE CANCELLATION

Granted: August 25, 2016
Application Number: 20160249127
A backward compatible system and method for using 4P audio jack in an electronic device to provide power and signal to headset with active noise cancellation (ANC) as well as accessories that require an external power are disclosed. The method involves automatically deciding at the electronic device accessory type after accessory insertion detected and choosing proper accessory communication mode based at least on the decided accessory type and accessory input signal. The accessory…

MICRO-GYROSCOPE FOR DETECTING MOTIONS

Granted: June 23, 2016
Application Number: 20160178374
The invention relates to a micro-gyroscope for detecting motions relative to an X and/or Y and Z axis, particularly as a 3D, 5D, or 6D sensor. Sample masses are disposed uniformly about an anchor and can be driven radially relative to the central anchor. Anchor springs are disposed to attach the sample masses to a substrate, and these sample masses can be deflected both radially within and out of the X-Y plane. A sensor mass is disposed on one-of the sample masses by means of sensor…

MICROMECHANICAL CORIOLIS RATE OF ROTATION SENSOR

Granted: June 16, 2016
Application Number: 20160169676
A micromechanical Coriolis rate of rotation sensor for detecting a rate of rotation, comprising a substrate, a measurement axis, a detection axis, and a drive axis, each disposed orthogonally to each other and a first and a second driving mass disposed in a plane parallel to the substrate. Each driving mass being rotatably connected to the substrate by means of a central suspension. The two central suspensions being disposed along the detection axis. Drive electrodes generate rotary…

TEMPERATURE COMPENSATED REAL-TIME CLOCK

Granted: April 28, 2016
Application Number: 20160116515
A temperature compensated real-time clock systems and methods can include: measuring a temperature with a temperature sensor; detecting a temperature dependent frequency from an oscillator; inputting the temperature and determining a temperature estimate for the oscillator with an infinite impulse response filter; and determining a compensation factor, for the oscillator.

TAMPER DETECTION SYSTEMS AND METHODS FOR INDUSTRIAL & METERING DEVICES NOT REQUIRING A BATTERY

Granted: April 7, 2016
Application Number: 20160098918
Embodiments of the invention prevent unauthorized access to electronic systems by providing an enclosure with improved intrusion detection around sensitive areas of a secured electronic system. Certain embodiments eliminate the need for constant battery power and yet provide uninterrupted high-security supervision at the device perimeter such that even following a power down event it is possible to determine whether a device has been tampered with, so that appropriate action can be…

SYSTEMS AND METHODS FOR ENHANCING CONFIDENTIALITY VIA LOGIC GATE ENCRYPTION

Granted: April 7, 2016
Application Number: 20160099714
Presented are systems and methods that allow hardware designers to protect valuable IP and information in the hardware domain in order to increase overall system security. In various embodiments of the invention this is accomplished by configuring logic gates of existing logic circuitry based on a key input. In certain embodiments, a logic function provides results that are dependent not only on input values but also on an encrypted logic key that determines connections for a given logic…

THREE PHASES CONTROLLER FOR BUCK-BOOST REGULATORS

Granted: March 31, 2016
Application Number: 20160094125
Systems, devices and methods using three separate switching phases for a buck-boost regulator are disclosed. The regulator may operate in a boost mode, a buck mode or in a buck-boost mode. The output voltage remains constant through mode changes and the ripple voltage is well-controlled. If the input voltage is lower than the output voltage by a first threshold, the regulator operates in boost (step-up) mode. If the input voltage is higher than the output voltage by a second threshold,…

SECURE MEMORIES USING UNIQUE IDENTIFICATION ELEMENTS

Granted: March 24, 2016
Application Number: 20160087795
Various embodiments of the invention relate to secure systems and modules, and more particularly, to systems, devices and methods of generating and applying identification elements uniquely associated with memory, memory mapping and encrypted storage. These unique identification elements provide an improved, statistically random source from which keys and memory mappings may be derived. The application of these keys across various architectures result in an improvement in the security of…

SYSTEMS AND METHODS FOR MANAGING CRYPTOGRAPHIC KEYS IN A SECURE MICROCONTROLLER

Granted: March 10, 2016
Application Number: 20160072628
The present invention relates to key management in a secure microcontroller, and more particularly, to systems, devices and methods of automatically and transparently employing logic or physical address based keys that may also be transferred using dedicated buses. A cryptographic engine translates a logic address to at least one physical address, and processes a corresponding data word based on at least one target key. The target key is selected from a plurality of keys based on the…

Micro-Gyroscope and Method for Operating a Micro-Gyroscope

Granted: February 11, 2016
Application Number: 20160040990
A micro-gyroscope for determining a rate of rotation about a Z-axis includes a substrate and two sensor devices each of which comprises at least one drive mass, at least one anchor, drive elements, at least one sensor mass and sensor elements. The drive mass is mounted linearly displaceably in the direction of an X-axis, and can be driven in an oscillatory manner with respect to the X-axis. The sensor mass is coupled to the drive mass by means of springs. The sensor mass is displaceable…

Gyroscope Shock and Disturbance Detection Circuit

Granted: February 11, 2016
Application Number: 20160040991
The invention relates to integrated circuits, and more particularly, to systems, devices and methods of integrating a gyro sensing circuit with a gyroscope to detect a shock or a disturbance, and accurately differentiate rotation-based sense signals from noises introduced by the shock or disturbance. The gyro sensing circuit may be implemented in a differential or non-differential demodulation scheme, and comprises at least one demodulation unit and a peak detector. The at least one…

DETECTING AND THWARTING BACKSIDE ATTACKS ON SECURED SYSTEMS

Granted: February 11, 2016
Application Number: 20160042199
Security devices for protecting ICs from backside security attacks. A security device includes an N? well formed in a substrate, a P+ center disposed in the central region of the N? well, and a P+ ring surrounding the N? well. To prevent latchup, a pair of inner and outer N+ rings is formed in the N? well. When a current source is applied to the P+ center, the current flows through a portion of the substrate and is picked up by the P+ ring. When an attacker mills the substrate or makes a…

MICRO RATE OF ROTATION SENSOR AND METHOD FOR OPERATING A MICRO RATE OF ROTATION SENSOR

Granted: February 4, 2016
Application Number: 20160033275
The present invention relates to a method for operating a rotation sensor for detecting a plurality of rates of rotation about orthogonal axes (x,y,z). The rotation sensor comprises a substrate, driving masses, X-Y sensor masses, and Z sensor masses. The driving masses are driven by drive elements to oscillate in the X-direction. The X-Y sensor masses are coupled to the driving masses, and driven to oscillate in the X-Y direction radially to a center. When a rate of rotation of the…

MEMS Gyroscope for Determining Rotational Movements about an X, Y, and/or Z Axis

Granted: January 28, 2016
Application Number: 20160025492
The invention relates to a MEMS gyroscope for detecting rotational motions about an x-, y-, and/or z-axis, in particular a 3-D sensor, containing a substrate, several, at least two, preferably four, drive masses (2) that are movable radially with respect to a center and drive elements (7) for the oscillating vibration of the drive masses (2) in order to generate Coriolis forces on the drive masses (2) in the event of rotation of the substrate about the x-, y-, and/or z-axis. The…

METHOD AND APPARATUS FOR SENSING CAPACITANCE VALUE AND CONVERTING IT INTO DIGITAL FORMAT

Granted: January 28, 2016
Application Number: 20160025786
A capacitive sensing system are configured to sense a capacitance value and convert the sensed capacitance value to a digital format. The capacitive sensing system provides good selectivity and immunity to noise and interference, which can be further enhanced by enabling spread spectrum excitation. In some embodiments, the capacitive sensing system utilizes a sinusoidal excitation signal that results in low electromagnetic emissions, limited to narrow frequency band. In some embodiments,…