Texas Instruments Corporation

Mediatek Singapore Pte. Ltd.

Halil Kiper

Baher S Haroun

Rahmi Hezar

Ajay Kumar

Mounir Fares

Srinath Mathur Ramaswamy

Gangadhar Burra

Ayman Shabra

Charles Guo Lin

Yuanying Deng

Burak Kelleci

A system for processing a signal includes a detector configured to detect a two-level stream of bits; a converter configured to generate a three-level control signal based on two adjacent values within the two-level stream of bits; and a switch configured to determine which of three different paths to couple a current source to based on a value of the three-level control signal. Thus, based on adjacent values of the output stream a three-level control signal is generated which controls coupling of the current source to one of three different paths. This type of three-level digital-to-analog converter can be, for example, part of the feedback loop of an analog-to-digital converter. Similar techniques can also be utilized in a multi-segment digital-to-analog converter in which each segment of the DAC is controlled by a 3-level control signal and the DAC is implement using PMOS devices. The current source for each DAC segment is diverted to ground, the M-node, or the P-node depending on the value of the 3-level control signal.

Two adjacent bit values switching current source between three paths

A reconfigurable analog-to-digital (ADC) modulator structure that includes a plurality of ADC structures being coupled to each other through their respective noise quantization transfer functions. Each ADC structure receives as input an analog signal and each ADC structure outputting a plurality of first output signals. An adder module receives the first output signals and performs addition on the first output signals and generates a second output signal. A division module receives the second output signal and performs division on the second output signal by a predetermined factor.

Reconfigurable delta-sigma modulator ADC using noise coupling

Three-level digital-to-analog converter

A low noise amplifier in an integrated circuit, the circuit having a digital portion and an analog portion on a common substrate, the digital portion having at least one clocking frequency, includes an input configured to receive a signal at a tuned frequency and an output circuit. The output circuit is configurable to operate in either a single-ended mode or a pseudo differential-ended mode, wherein the output circuit is configured in the pseudo differential-ended mode when the tuned frequency is substantially similar to the at least one clocking frequency or one of its harmonics and otherwise configured in the single-ended mode.

Receiver dynamically switching to pseudo differential mode for SOC spur reduction

An adaptive digital pre-distortion block is used to cancel device nonlinearities to improve the overall linearity of a Delta-Sigma DAC system. In particular, the pre-distortion block may be implemented all in digital components and utilize programmable registers that change the pre-distortion transfer function either statically or dynamically, or both. Static changes can be for variation in process corners during production, whereas, dynamic changes can be used to correct nonlinear changes that can occur from environmental reasons such as voltage, temperature, aging and device stress.

Adaptive digital audio pre-distortion in an audio digital to analog converter

Growing community of inventors

Somerville, MA, United States of America

Halil Kiper