Texas Instruments Corporation

Mounir Fares

Irfan Azam Chaudhry

Baher S Haroun

Rahmi Hezar

Ajay Kumar

Ching-Yuh Tsay

Halil Kiper

Alexander Bugeja

Abdellatif Bellaouar

Eric G Soenen

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

Three-level digital-to-analog converter

An averaging circuit includes: input signal nodes for providing input signals ; a multiplexing circuit coupled to the input signal nodes for switching between the input signals to create a time waveform; a low pass filter coupled to an output of the multiplexing circuit for filtering the time waveform to create an average signal; and an average replication circuit coupled to an output of the low pass filter

Circuit for precise measurement of the average value of the outputs of multiple circuit unit elements

A segmented digital-to-analog converter includes: upper segments , and ; a thermometer decoder ; a randomizing circuit coupled between the thermometer decoder and the upper segments , and for randomizing an output of the thermometer decoder ; a divider location selector circuit coupled between the randomizing circuit and the upper segments , and for choosing a selected segment from the upper segments , and ; and lower segments coupled to the selected segment.

Segmented high speed and high resolution digital-to-analog converter

A skewless differential switching circuit uses skewless switching elements to convert complementary signals with skew into complementary output signals with minimal time skew between the output signals and with equalized rise and fall times of the output signals for minimum harmonic distortion.

Skewless differential switching scheme for current-mode digital-to-analog converters

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Murphy, TX, United States of America

Mounir Fares