Qualcomm Incorporated

Osama Elhadidy

Bhushan Shanti Asuri

Ashok Swaminathan

Nitz Saputra

Ibrahim Ramez Chamas

Bo Yang

Mohamed Abouzied

Peter Gazzerro

Methods and apparatus for filtering a signal using a current-mode filter circuit implementing source degeneration. An example filter circuit generally includes an input node; an output node; a power supply node; a first transistor comprising a drain coupled to the input node; a second transistor comprising a drain coupled to the output node and comprising a gate coupled to a gate of the first transistor; a capacitive element coupled between the drain of the first transistor and the power supply node; a first resistive element coupled between the drain and the gate of the first transistor; a first source degeneration element coupled between a source of the first transistor and the power supply node; and a second source degeneration element coupled between a source of the second transistor and the power supply node.

Wideband current-mode low-pass filter circuits

Certain aspects provide a circuit for frequency conversion. The circuit includes first mixer circuitry coupled to a load circuit and having a first mixer configured to generate a first portion of a frequency-converted differential signal to be provided to the load circuit based on first differential input signals and second differential input signals, and a second mixer configured to generate a second portion of the frequency-converted differential signal based on third differential input signals and fourth differential input signals. The circuit also includes second mixer circuitry coupled to another load circuit and having a third mixer configured to generate a first portion of another frequency-converted differential signal based on the first differential input signals and the fourth differential input signals, and a fourth mixer configured to generate a second portion of the other frequency-converted differential signal based on the third differential input signals and the second differential input signals.

Bandtilt correction using combined signal and image passive mixers

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San Diego, CA, United States of America

Osama Elhadidy