A Low In-Band Radiation Superregenerative Oscillator

• Published in: IEEE transactions on circuits and systems. II, Express briefs Express briefs, 2013-06, Vol.60 (6), p.307-310
• Main Authors: Palà Schönwälder, Pere, Bonet Dalmau, Jordi, Moncunill Geniz, Francesc Xavier, Águila López, Francisco del, Giralt Mas, Ma. Rosa
• Format: Article
• Language: English
• Subjects: Enginyeria de la telecomunicació; Envelope detectors; Frequencies of oscillating systems; Frequency measurement; Frequency modulation; Freqüències de sistemes oscil·lants; Low power; Oscillator reradiation; Processament del senyal; Radio; Radio receiver; Receivers; Receivers and reception; Receptors i recepció; Ràdio; Sensitivity; Superregenerative (SR) receiver; Voltage-controlled oscillators; Àrees temàtiques de la UPC
• ISSN: 1549-7747; 1558-3791
• DOI: 10.1109/TCSII.2013.2258254

This brief describes a superregenerative (SR) voltage-controlled oscillator as a building block for SR receivers where most of the oscillator spectrum components are outside the reception frequency band. This allows overcoming one of the main drawbacks of SR receivers, i.e., the potential interference to nearby receivers operating at the same frequency due to oscillator reradiation. We perform a qualitative analysis of the solution of the circuit equations, describe the most relevant parameters for design, and provide some numerical simulation results. Experimental results on a proof-of-concept implementation validating the described principle and a discussion of the observed behavior are provided.