Title :
Supercritical stability in a sonar receiver circuit
Author :
Tapson, Jonathan
Author_Institution :
Dept. of Electr. Eng., Cape Town Univ., Rondebosch
Abstract :
We describe a simple circuit, inspired by the human auditory system, which allows controllable supercritical stability in a sonar receiver. The receiver is held on the threshold of self-oscillation when signal levels are low. The effect is to improve the sensitivity and SNR for small and subthreshold signals, at the cost of some bandwidth, while providing unchanged bandwidth and sensitivity at higher signal levels
Keywords :
acoustic receivers; circuit stability; network topology; sonar; human auditory system; self-oscillation threshold; sonar receiver circuit; subthreshold signals; supercritical stability; Auditory system; Bandwidth; Bifurcation; Circuit stability; Control systems; Feedback circuits; Humans; RLC circuits; Sonar; Transducers;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1692719
