Analysis and Design of Digitally Controllable Oscillators
- Research field:mmW Circuit Design, RFIC Design
- Type:Master Thesis
There is growing interest in oscillators with a wide frequency tuning range, e.g. for high data-rate communications or imaging applications with high resolution. In classic Voltage-Controlled Oscillators (VCOs), wide tuning ranges can be achieved through analog tuning of large-sized varactors, but at the cost of an increased phase noise due to a high tuning sensitivity (VCO gain). One approach to reduce the VCO gain is to employ a bank of binary-weighted capacitors with digital controllability for coarse tuning of the frequency, while a single small-sized varactor can be used for continuous fine tuning.
The aim of this thesis is to design a digitally controllable oscillator for millimeter-wave applications in a SiGe BiCMOS technology. The task includes schematic simulations and the layout design.
Theoretical analysis will be focused on digital frequency tuning
Design and Simulation of the circuits in a state-of-the-art SiGe BiCMOS technology with industry-standard RFIC Design Tools (ADS, Cadence Virtuoso)
Requirements: Good understanding of circuits (e.g. ES, RFE or RFICS)
Language: German or English