Title :
Analysis of limit-cycle oscillations in a log-domain filter
Author :
Fox, Robert ; Ferrer, Enrique
Author_Institution :
Dept. of Electr. & Comput. Eng., Florida Univ., Gainesville, FL, USA
Abstract :
A circuit is presented for a class-AB fully differential log-domain parallel resonator. If floating rather than shunt capacitive loads are used, the circuit can be triggered into steady-state limit-cycle oscillations by large-enough transient input stimuli. The nature of the instability is explored. Transient analysis in SPICE is used to locate the separatrix between stable-equilibrium-point-seeking and limit-cycle-seeking regions of state space
Keywords :
SPICE; active filters; circuit analysis computing; limit cycles; resonators; state-space methods; transient analysis; SPICE; class-AB fully differential log-domain parallel resonator; floating capacitive loads; limit-cycle-seeking; log-domain filter; separatrix; stable-equilibrium-point-seeking; state space; steady-state limit-cycle oscillations; transient analysis; transient input stimuli; Bipolar transistors; Capacitors; Circuits; Gyrators; Limit-cycles; Resonator filters; Shunt (electrical); Signal processing; Transconductors; Voltage;
Conference_Titel :
Circuits and Systems, 1998. ISCAS '98. Proceedings of the 1998 IEEE International Symposium on
Conference_Location :
Monterey, CA
Print_ISBN :
0-7803-4455-3
DOI :
10.1109/ISCAS.1998.704099
