We present the first 90-nm digital CMOS RF power amplifier. This PA contains a large array of NMOS switches, and performs a direct digital-to-RF-amplitude conversion, filtering and buffering in a fully-integrated GSM/EDGE transmitter. Power control is fully digital. 40% efficiency is obtained at 10-dBm output power from 1.4 V and it occupies 0.005 mm/sup 2/.
We present a novel approach for built-in self-testing (BIST) of an RF wireless transmitter. This approach, based on fully-digital hardware and on software algorithms, allows the testing of the transmitter's analog/RF circuitry while providing low-cost replacements for the costly traditional RF tests. The testing approach is structural in nature and… (More)
—A new broadcast format is presented for the atomic-clock time-code signal broadcast by the National Institute of Standards of Technology (NIST) from station WWVB in Fort Collins, Colorado. The new broadcast format, based on BPSK modulation that is added to the existing amplitude-modulation (AM), offers many new features and provides several orders of… (More)
WWVB is a broadcast station, operated by the National Institute of Standards and Technology, which has been broadcasting time information to radio-controlled clocks (RCC) throughout the continental US since 1965. The transmitted information includes the year (excluding the century), day, hour, minute, and notifications for leap seconds and for daylight… (More)
—We propose a new multirate architecture of an all-digital PLL (ADPLL) featuring phase/frequency modulation capability. While the ADPLL approach has already proven its benefits of power dissipation and cost reduction through the discrete-time operation and full RF-SoC integration in nanoscale CMOS, the coarse discretization of the phase detector function… (More)