Effects of quench discretization on superregenerative oscillators

The performance of superregenerative receivers is strongly influenced by the quench signal and it is a well-known fact that specific quench shapes may optimize certain parameters. Using a frequency-domain approach, in this paper we investigate the effects that the discretization of the quench signal has on relevant parameters such as the envelope, the frequency response of the receiver or the instantaneous frequency of the supperregenerative oscillator. The effects of different amounts of quench filtering are also investigated. One of the main consequences of quench discretization is the presence of secondary lobes in the frequency response, located at multiples of the sampling frequency.