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An LC-VCO-based MDLL is presented in a fractional-N frequency synthesizer to extend its frequency multiplication factor and performance. By employing the proposed MUXs in the LC-VCO, it increases the loop bandwidth (BW) from 3MHz to 15MHz (nearly 0.4fREF) as well as flicker noise suppression. Moreover, the re-quantized delta-sigma modulator (DSM) is combined with the prototype in order to reduce spurious...
We introduce a new approach to measure spin waves on-chip and describe the design of an ultra-wideband Low-Noise Amplifier (LNA) implemented in a readout circuitry for characterization of the spin wave devices. The LNA shows a gain of 22.6 dB in the frequency range between 9.7 GHz and 43.3 GHz. The minimum Noise Figure (NF) is 5.3 dB at 22.75 GHz. Simulations were performed with 65 nm CMOS technology...
A low power 77GHz receiver, suitable to be used in a FM-CW Automotive Radar has been designed using a 1P6M 65nm RFCMOS process. It has been implemented using a direct conversion architecture. The 77GHz signal generation block generates a FM-CW signal that pre-drives the external PA with a power level of -4.5dBm and also works as a Local Oscillator (LO) signal in the downconversion mixer. The ladder...
Focusing on circuit routing which is a very critical design step in mm-Waves range, this work proposes a systematic modeling of layout parasitic elements thus fitting measurement and simulation results. Scalable models of extra-device routing elements based on 3D EM software simulations are developed. Two building blocks are so designed and implemented in a 130 nm BiCMOS technology. A two stage cascode...
A 2 GHz CMOS VCO, employing noise cancellation to eliminate flicker noise up-conversion, has been fabricated in 0.35 mum CMOS. An overall phase noise reduction of 10 dB has been measured with the proposed technique, and phase noise of -121.6 dBc/Hz@500 kHz offset has been achieved. The VCO core consumes 2.8 mA under 2.4V supply and occupies an area of 0.7 mmtimes0.8 mm. The proposed VCO measured FOM...
The next generation of wireless communication is a ubiquitous radio system concept, providing wireless access from short-range to wide-area, with one single reconfigurable and adaptive system for all envisaged radio environments. This paper presents the design approach of RCO (reconfigurable concurrent oscillator) that simultaneously generates two or more signals of different frequencies that eliminate...
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