An 11-Mb/s 2.1-mW Synchronous Superregenerative Receiver at 2.4 GHz

Abstract

This paper presents a low-voltage low-power high-speed superregenerative receiver operating in the 2.4-GHz industrial-scientific-medical band. The receiver uses an architecture in which, thanks to the presence of a phase-locked loop, the quench oscillator is operated synchronously with the received data at a quench frequency equal to the data rate. This mode of operation has several benefits. Firstly, the traditional problem of poor selectivity in this type of receiver is to a large extent overcome. Secondly, considerably higher data rates can be achieved than with classical receivers. Thirdly, the bit envelope can be matched to the superregenerative oscillator, which improves sensitivity. The receiver includes an RF front end optimized to support high quench frequencies at low supply voltages, responding to today's increasing demand for high speed and low power consumption. The prototype implemented is very simple and achieves a data rate of 11 Mb/s with a current consumption of 1.75 mA at a supply voltage of 1.2 V-an excellent tradeoff between cost, performance, and power consumption.

On the human body communications: wake-up receiver design and channel characterization

“…Therefore, if transconductance changes slowly during the sampling period, good selectivity will be achieved. A selectivity of the receiver is higher if data rate equals to the quench frequency [46]. However, to match quench frequency with data rate, one needs to enable accurate synchronization between a transmitter and a receiver.…”

Inexpensive Interferometer for Low Frequency Radio Astronomy

“…In (8), the first term applies to the contribution of the galaxy itself, whereas the second term is due to extragalactic noise, which is assumed to be spatially uniform.…”

“…The proposed interferometer employs two superregenerative receivers deployed for low frequency radio astronomy applications. According to [8], the super-regenerative receiver has a reduced cost and a low power consumption. The receiver prototype is a hybrid model of software-defined radio (SDR), because its output signal is at audio frequency, and also due the interferometer correlation is performed by software.…”

Ultra Wideband Impulse Radio Superregenerative Reception

“…4, the input signal is sampled synchronously at a rate of one sample per bit (Moncunill et al, 2007a). Thus, the required quench frequency is much lower than in a classical receiver, and therefore, the selectivity is significantly higher.…”

“…The pulsating nature of SR receivers, and the fact that they are sensitive to the input signal in a small fraction of the quench period-and therefore, exhibit large reception bandwidths-makes them ideal for UWB IR signal reception. Furthermore, Gaussian pulses are not only optimum signals for SR receivers operated in the slope-controlled state (Moncunill et al, 2007a), but they, and their derivatives (e.g. Gaussian monopulse; first derivative of Gaussian; Mexican hat, second derivative of Gaussian; and Gaussian doublet) are among the most widely used signals for UWB IR (Ghavami et al, 2004;Opperman et al, 2004).…”