Qualcomm Incorporated

Eunyung Sung

Shahin Mehdizad Taleie

Peter J Shah

Dongwon Seo

Behnam Sedighi

Ashok Swaminathan

Nitz Saputra

Guoqing Miao

Honghao Ji

Gerrit Groenewold

A current digital-to-analog converter includes a binary current-generating section configured to generate a binary-weighted current based on a first set of control signals; a unary current-generating section configured to generate a unary-weighted current based on a second set of control signals; and a current combining circuit configured to add or subtract a reference current and a current generated by a current source of the unary current-generating section using the binary-weighted current.

Apparatus and method for measuring current source mismatches in current-steering DAC by re-using R2R network

A switched-capacitor DC blocking amplifier is disclosed. In an embodiment, an integrated circuit is provided that includes an amplifier having an amplifier input and an amplifier output, a capacitor connected to the amplifier input and configured to receive an input signal, and a switched capacitor circuit coupled to provide a resistance between the amplifier input and the amplifier output. In one implementation, the switched capacitor circuit is configured with a feed forward circuit to reduce aliasing. In another implementation, the switched capacitor circuit includes a switched impedance circuit to reduce noise.

Switched-capacitor DC blocking amplifier

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San Diego, CA, United States of America

Eunyung Sung