Tirdad Sowlati

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Raja Pullela, Shahrzad Tadjpour, Dmitriy Rozenblit, William Domino, Thomas Obkircher, Mohamed El Said, Bala Ramachandran, Tirdad Sowlati, Darioush Agahi, WeiHong Chen, Dean A. Badillo, Masoud Kahrizi, Jaleh Komaili, Stephane Wloczysiak, Utku Seckin, Yun-Young Choi, Hasan Akyol, Martin Vadkerti, Amir Mahjoob, Hamid Firouzkouhi, Daniel Shum, Rajendra(More)
A fully integrated 60GHz CMOS PA with a PSAT of 22.6dBm is presented. To our knowledge, this is the highest reported PSAT at mm-waves in standard CMOS. To achieve a high power level, 32 differential PAs are combined through a network of transmission lines, Wilkinson combiners, and a multi-port argyle transformer. This method of combining minimizes loss(More)
This paper presents four novel interconnect based capacitors with 2 to 3 times the capacitance density of a conventional metal sandwich capacitor and with self-resonant frequencies above 20 GHz, suitable for low power RF applications. Unlike the conventional capacitor, the capacitance density of these structures increases with the scaling of the technology.(More)
Clustering and multi-core transformer coupling techniques are presented to improve phase noise, tuning range, and reliability of a mm-wave VCO. A proofof-concept design targeting the WiGig protocol is shown. Each cluster of VCOs covers one channel resulting in better phase noise performance. Multicores of VCOs with uncorrelated noise are combined using(More)
An EDGE transmitter using a nonlinear GSM type PA is presented. It is based on a polar loop architecture that employs separate feedback control of the amplitude and the phase of the output signal. With this approach, the problems with AM-to-PM as well as AM-to-AM of the nonlinear PA are essentially eliminated. There is no mode change between GMSK and EDGE,(More)